阅读说明：本技术 射频开关装置及多端口线阵列天线测试系统 (Radio frequency switch device and multi-port line array antenna test system ) 是由 黄建军 于 2021-06-30 设计创作，主要内容包括：本发明公开一种射频开关装置及多端口线阵列天线测试系统。其中,射频开关装置应用于多端口线阵列天线测试系统,线阵列天线包括多个阵列单元,多端口线阵列天线测试系统包括矢量网络分析仪、外部终端和探头,射频开关装置包括开关控制信号接入端和开关阵列,开关阵列的第一输入端与矢量网络分析仪的第一端口电连接,开关阵列的的第二输入端与矢量网络分析仪的第二端口电连接,开关阵列具有多个输出端,其一输出端与探头电连接,其余输出端与多个阵列单元的端口电连接。本发明提高线阵列S参数和辐射参数检测的效率。(The invention discloses a radio frequency switch device and a multi-port linear array antenna test system. The radio frequency switch device is applied to a multi-port line array antenna test system, the line array antenna comprises a plurality of array units, the multi-port line array antenna test system comprises a vector network analyzer, an external terminal and a probe, the radio frequency switch device comprises a switch control signal access end and a switch array, a first input end of the switch array is electrically connected with a first port of the vector network analyzer, a second input end of the switch array is electrically connected with a second port of the vector network analyzer, the switch array is provided with a plurality of output ends, an output end of the switch array is electrically connected with the probe, and other output ends are electrically connected with ports of the array units. The invention improves the efficiency of detecting the S parameter and the radiation parameter of the line array.)

1. A radio frequency switching device for use in a multi-port line array antenna test system, the line array antenna including a plurality of array elements, the multi-port line array antenna test system including a vector network analyzer, an external terminal and a probe moving along the direction of the line array antenna for receiving radiation signals output by the line array antenna in different directions, the radio frequency switching device comprising:

the switch control signal access end is used for accessing an S parameter test switch signal, a radiation parameter test switch signal and a probe starting signal;

a switch array, a first input end of which is electrically connected with a first port of the vector network analyzer, a second input end of which is electrically connected with a second port of the vector network analyzer, the switch array having a plurality of output ends, one of which is electrically connected with the probe, and the other of which is electrically connected with ports of the plurality of array units;

the switch array is used for sequentially conducting the paths between the ports of any two array units and the first port and the second port of the vector network analyzer according to the S parameter test switch signal when the S parameter test switch signal is received;

the switch array is further used for conducting a path between a second port of the vector network analyzer and the probe when the probe starting signal is received; and when the radiation parameter test switch signal is received, switching the on-off between the first port of the vector network analyzer and the plurality of linear array units periodically according to the radiation parameter test switch signal.

2. The radio frequency switch apparatus of claim 1, wherein the vector network analyzer is configured to output a synchronous signal corresponding to the synchronous output when outputting the test signal, and further comprising a synchronous control circuit, an output terminal of the synchronous control circuit being connected to the controlled terminal of the switch array, an input terminal of the synchronous control circuit being connected to the synchronous terminal of the vector network analyzer, the synchronous control circuit being configured to be connected to the external terminal in a wired communication manner;

the synchronous control circuit is used for stopping receiving the synchronous signal when receiving a channel switching instruction sent by the external terminal and outputting a corresponding S parameter test switch signal according to the channel switching instruction;

the synchronous control circuit is also used for outputting a probe starting signal when a channel switching instruction sent by the external terminal is not received; and outputting a corresponding radiation parameter test switch signal according to the period of the synchronous signal output by the vector network analyzer so as to control the switch array to periodically switch the on-off between the first port of the vector network analyzer and the plurality of linear array units.

3. The radio frequency switching device of claim 2, wherein the array units are grouped in pairs, wherein the switch array comprises a plurality of groups of switch units and a probe switch;

each group of the switch units comprises a first input switch, a second input switch and an output switch;

the controlled ends of the first input switch, the second input switch and the output switch are all electrically connected with the synchronous control circuit;

the input end of the first input switch is electrically connected with the first port of the vector network analyzer, and the input end of the second input switch is electrically connected with the second port of the vector network analyzer;

the output switch is provided with a first input end, a second input end, a first output end and a second output end, and the output switch conducts a path between the first input end and the first output end and a path between the second input end and the second output end under the condition of not triggering; the output switch conducts a path between the first input end and the second output end and conducts a path between the second input end and the first output end under the condition of being triggered;

the output end of the first input switch is connected with the first input end of the output switch, the output end of the second input switch is connected with the second input end of the output switch, the first output end of the output switch is electrically connected with the port of one array unit of a group of array units, and the second output end of the output switch is electrically connected with the port of the other array unit of the group of array units;

the input end of the probe switch is electrically connected with the second port of the vector network analyzer, the output end of the probe switch is electrically connected with the probe, and the controlled end of the probe switch is electrically connected with the synchronous control circuit.

4. The radio frequency switching device according to claim 3, wherein the first input switch is an electronic switch, and a plurality of the first input switches may be integrated into one electronic switch; the second input switch, the output switch and the probe switch are all mechanical switches, and the probe switch and the plurality of second input switches can be integrated into one mechanical switch.

5. A multi-port line array antenna test system comprising a vector network analyzer, an external terminal, a probe, a drive assembly, a position detection device and a radio frequency switch device as claimed in any one of claims 1 to 4;

the radio frequency switch device is electrically connected with the vector network analyzer, the probe and the linear array antenna respectively;

the vector network analyzer is electrically connected with the radio frequency switch device and is used for being in communication connection with the external terminal;

the probe is electrically connected with the radio frequency switch device and is also in driving connection with the driving component;

the driving assembly is used for being in communication connection with the external terminal;

the position detection device is used for being in communication connection with the external terminal;

the external terminal is used for outputting a channel switching instruction to the radio frequency switch device when performing the linear array antenna S parameter test; controlling the vector network analyzer to output a test signal to carry out S parameter test on the linear array antenna and transmitting an S parameter test result back to the external terminal;

the external terminal is further used for controlling the vector network analyzer to send a test signal to the line array antenna when the line array antenna radiation parameter test is carried out; the driving assembly is controlled to drive the probe to move within a preset range, so that the probe receives radiation signals emitted by the line array antenna within the preset range to different positions and outputs the radiation signals to the vector network analyzer; controlling the position detection device to detect the position of the probe and returning a position detection signal to the external terminal;

the vector network analyzer is further configured to obtain field intensity data of the radiation signals emitted to different positions by the line array antenna in the preset range, and upload the field intensity data to the external terminal, so that the external terminal generates near-field intensity distribution data of the line array antenna according to the position detection signal and the field intensity data of the radiation signals emitted to different positions by the line array antenna in the preset range.

6. The multi-port array antenna test system of claim 5, wherein the multi-port array antenna test system further comprises a polarizer;

the polarizer is electrically connected with the probe and is used for being in communication connection with the external terminal, and the polarization of the probe is changed according to the control of the external terminal when the radiation parameter detection is carried out on the linear array antenna, so that the probe receives radiation signals of different polarizations sent by the linear array antenna in the preset test area to different positions.

7. The multi-port line array antenna test system of claim 6, wherein the predetermined range has a first position and a second position, the length direction of the line array antenna being coincident with the direction from the first position to the second position; the drive assembly includes:

a guide rail extending in the direction of the first and second positions;

the transmission part is arranged on the guide rail, and the probe and the polarizer are arranged on the transmission part;

the driving piece is used for being in communication connection with the external terminal, and the driving piece is used for driving the transmission piece to move on the guide rail under the control of the external terminal.

8. The multi-port line array antenna test system of claim 7, wherein the vector network analyzer is further configured to output a plurality of sets of the test signals simultaneously, each set of the test signals corresponding to one of the synchronization signals, each set of the test signals including radio frequency signals of a plurality of frequencies, the radio frequency signals of the frequencies having the same duration;

the multi-port linear array antenna test system also comprises a synchronization device which is respectively and electrically connected with the vector network analyzer and the position detection device; the synchronization device is used for being in communication connection with the external terminal;

the synchronous device is used for storing a position detection signal currently detected by the position detection device and transmitting the position detection signal to an external terminal when the radiation parameter is detected and the rising edge of the synchronous signal corresponding to each group of test signals; and when the falling edge of the synchronous signal corresponding to each group of test signals is detected, storing the position detection signal currently detected by the position detection device and uploading the position detection signal to an external terminal so that the external terminal can synchronize the field intensity data of the radiation signal output by the vector network analyzer corresponding to the position detection signal output by the position detection device.

9. The multi-port line array antenna testing system of claim 8, further comprising a dark room;

the probe, the polarizer, the driving assembly, the position detection device, the radio frequency switch device and the synchronization device are all arranged in the darkroom; the inner wall of the darkroom is provided with a top surface and a plurality of peripheral side surfaces connected with the top surface, and the top surface and at least one peripheral side surface are provided with wave-absorbing materials.

Technical Field

The invention relates to the field of mobile communication, in particular to a radio frequency switch device and a multi-port linear array antenna test system.

Background

In the process of producing the line array antenna of the base station, the performance of the line array antenna leaving the factory needs to be detected, the line array antenna test is often divided into an S parameter test and a radiation parameter test, but the line array antenna is often multi-port, when the S parameter is tested, a vector network analyzer for testing is often only provided with two ports, when the test is carried out, the repeated port connection change is troublesome, secondly, when the radiation parameter is tested, the line array antenna of each port needs to be tested independently, a probe for collecting radiation signals needs to repeatedly go back and forth within a preset detection range for multiple times to receive the radiation parameters radiated by the array units of different ports, and the test time is greatly prolonged. In addition, if the testing of the S parameter is completed, the port wiring needs to be changed and the radiation parameter needs to be tested, so that the testing speed of the S parameter and the radiation parameter of the factory wire array antenna is integrally reduced.

Disclosure of Invention

The invention mainly aims to provide a radio frequency switch device and a multi-port line array antenna test system, aiming at improving the efficiency of detecting line array S parameters and radiation parameters.

In order to achieve the above object, the present invention provides a radio frequency switch device applied to a multi-port line array antenna test system, where a line array antenna includes a plurality of array units, the multi-port line array antenna test system includes a vector network analyzer, an external terminal, and a probe moving along the direction of the line array antenna for receiving radiation signals output by the line array antenna in different directions, and the radio frequency switch device includes:

the switch control signal access end is used for accessing an S parameter test switch signal, a radiation parameter test switch signal and a probe starting signal;

a switch array, a first input end of which is electrically connected with a first port of the vector network analyzer, a second input end of which is electrically connected with a second port of the vector network analyzer, the switch array having a plurality of output ends, one of which is electrically connected with the probe, and the other of which is electrically connected with ports of the plurality of array units;

the switch array is used for sequentially conducting the paths between the ports of any two array units and the first port and the second port of the vector network analyzer according to the S parameter test switch signal when the S parameter test switch signal is received;

the switch array is further used for conducting a path between a second port of the vector network analyzer and the probe when the probe starting signal is received; and when the radiation parameter test switch signal is received, switching the on-off between the first port of the vector network analyzer and the plurality of linear array units periodically according to the radiation parameter test switch signal.

Optionally, the vector network analyzer is configured to output a synchronous signal corresponding to the test signal, and the radio frequency switch device further includes a synchronous control circuit, an output end of the synchronous control circuit is connected to the controlled end of the switch array, an input end of the synchronous control circuit is connected to the synchronous end of the vector network analyzer, and the synchronous control circuit is configured to be in wired communication connection with the external terminal;

the synchronous control circuit is used for stopping receiving the synchronous signal when receiving a channel switching instruction sent by the external terminal and outputting a corresponding S parameter test switch signal according to the channel switching instruction;

the synchronous control circuit is also used for outputting a probe starting signal when a channel switching instruction sent by the external terminal is not received; and outputting a corresponding radiation parameter test switch signal according to the period of the synchronous signal output by the vector network analyzer so as to control the switch array to periodically switch the on-off between the first port of the vector network analyzer and the plurality of linear array units.

Optionally, the array units are grouped into one group two by two, and the switch array includes multiple groups of switch units and a probe switch;

each group of the switch units comprises a first input switch, a second input switch and an output switch;

the controlled ends of the first input switch, the second input switch and the output switch are all electrically connected with the synchronous control circuit;

the input end of the first input switch is electrically connected with the first port of the vector network analyzer, and the input end of the second input switch is electrically connected with the second port of the vector network analyzer;

the output switch is provided with a first input end, a second input end, a first output end and a second output end, and the output switch conducts a path between the first input end and the first output end and a path between the second input end and the second output end under the condition of not triggering; the output switch conducts a path between the first input end and the second output end and conducts a path between the second input end and the first output end under the condition of being triggered;

the output end of the first input switch is connected with the first input end of the output switch, the output end of the second input switch is connected with the second input end of the output switch, the first output end of the output switch is electrically connected with the port of one array unit of a group of array units, and the second output end of the output switch is electrically connected with the port of the other array unit of the group of array units;

the input end of the probe switch is electrically connected with the second port of the vector network analyzer, the output end of the probe switch is electrically connected with the probe, and the controlled end of the probe switch is electrically connected with the synchronous control circuit.

Optionally, the first input switch is an electronic switch, and a plurality of the first input switches may be integrated into one electronic switch; the second input switch, the output switch and the probe switch are all mechanical switches, and the probe switch and the plurality of second input switches can be integrated into one mechanical switch.

Optionally, the multi-port line array antenna test system comprises a vector network analyzer, an external terminal, a probe, a drive assembly, a position detection device and the radio frequency switch device of any one of claims 1-5;

the radio frequency switch device is electrically connected with the vector network analyzer, the probe and the linear array antenna respectively;

the vector network analyzer is electrically connected with the radio frequency switch device and is used for being in communication connection with the external terminal;

the probe is electrically connected with the radio frequency switch device and is also in driving connection with the driving component;

the driving assembly is used for being in communication connection with the external terminal;

the position detection device is used for being in communication connection with the external terminal;

the external terminal is used for outputting a channel switching instruction to the radio frequency switch device when performing the linear array antenna S parameter test; controlling the vector network analyzer to output a test signal to carry out S parameter test on the linear array antenna and transmitting an S parameter test result back to the external terminal;

the external terminal is further used for controlling the vector network analyzer to send a test signal to the line array antenna when the line array antenna radiation parameter test is carried out; the driving assembly is controlled to drive the probe to move within a preset range, so that the probe receives radiation signals emitted by the line array antenna within the preset range to different positions and outputs the radiation signals to the vector network analyzer; controlling the position detection device to detect the position of the probe and returning a position detection signal to the external terminal;

the vector network analyzer is further configured to obtain field intensity data of the radiation signals emitted to different positions by the line array antenna in the preset range, and upload the field intensity data to the external terminal, so that the external terminal generates near-field intensity distribution data of the line array antenna according to the position detection signal and the field intensity data of the radiation signals emitted to different positions by the line array antenna in the preset range.

Optionally, the multi-port array antenna test system further comprises a polarizer;

the polarizer is electrically connected with the probe and is used for being in communication connection with the external terminal, and the polarization of the probe is changed according to the control of the external terminal when the radiation parameter detection is carried out on the linear array antenna, so that the probe receives radiation signals of different polarizations sent by the linear array antenna in the preset test area to different positions.

Optionally, the preset range has a first position and a second position, and the length direction of the line array antenna is consistent with the direction from the first position to the second position; the drive assembly includes:

a guide rail extending in the direction of the first and second positions;

the transmission part is arranged on the guide rail, and the probe and the polarizer are arranged on the transmission part;

the driving piece is used for being in communication connection with the external terminal, and the driving piece is used for driving the transmission piece to move on the guide rail under the control of the external terminal.

Optionally, the vector network analyzer is further configured to output a plurality of synchronization signals correspondingly and synchronously when outputting a plurality of sets of test signals, where each set of test signal corresponds to one synchronization signal, each set of test signal includes radio frequency signals of a plurality of frequencies, and the durations of the radio frequency signals of the frequencies are the same;

the multi-port linear array antenna test system also comprises a synchronization device which is respectively and electrically connected with the vector network analyzer and the position detection device; the synchronization device is used for being in communication connection with the external terminal;

the synchronous device is used for storing a position detection signal currently detected by the position detection device and transmitting the position detection signal to an external terminal when the radiation parameter is detected and the rising edge of the synchronous signal corresponding to each group of test signals; and when the falling edge of the synchronous signal corresponding to each group of test signals is detected, storing the position detection signal currently detected by the position detection device and uploading the position detection signal to an external terminal so that the external terminal can synchronize the field intensity data of the radiation signal output by the vector network analyzer corresponding to the position detection signal output by the position detection device.

Optionally, the multi-port line array antenna test system further comprises a darkroom;

the probe, the polarizer, the driving assembly, the position detection device, the radio frequency switch device and the synchronization device are all arranged in the darkroom; the inner wall of the darkroom is provided with a top surface and a plurality of peripheral side surfaces connected with the top surface, and the top surface and at least one peripheral side surface are provided with wave-absorbing materials.

The switch control signal access end is set to access an S parameter test switch signal, a radiation parameter test switch signal and a probe starting signal, and when a switch array receives the S parameter test switch signal, a channel between the ports of any two array units and a first port and a second port of a vector network analyzer is sequentially conducted according to the S parameter test switch signal; and when a probe starting signal is received, conducting a path between the second port of the vector network analyzer and the probe, testing a switch signal according to the radiation parameter, and periodically conducting the on-off between the first port of the vector network analyzer and the plurality of linear array units. Therefore, the S parameter and the radiation parameter of the multi-port line array antenna can be compatibly tested in the test of the multi-port line array antenna. Meanwhile, when S parameter testing is not needed, connection between the first port and the second port of the vector network analyzer and any two array units is not needed to be adjusted manually and repeatedly, and when radiation parameter testing is not needed, the probe is enabled to carry out independent testing on the array units of each port repeatedly within a preset detection range, so that testing efficiency is effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a functional block diagram of an embodiment of an RF switch apparatus according to the present invention;

FIG. 2 is a schematic circuit diagram of an embodiment of an RF switch apparatus according to the invention;

FIG. 3 is a schematic circuit block diagram of another embodiment of the RF switch apparatus of the present invention;

FIG. 4 is a schematic circuit diagram of an RF switch device according to another embodiment of the present invention;

FIG. 5 is a functional block diagram of a multi-port line array antenna test system according to an embodiment of the present invention;

FIG. 6 is a functional block diagram of another embodiment of a multi-port line array antenna test system according to the present invention;

fig. 7 shows the synchronization signal output by the vector network analyzer during operation.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Switch array	20	Synchronous control circuit
11	Switch unit	12	Probe switch
				30	Vector network analyzer	40	Probe head
50	Drive assembly	51	Guide rail
				52	Transmission member	53	Driving member
60	Position detecting device	70	Polarizer
				80	Synchronization device

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

It will be appreciated that the radio frequency switch arrangement is applicable to a multi-port line array antenna test system, the line array antenna comprising a plurality of array elements, the multi-port line array antenna test system comprising a vector network analyzer 30, an external terminal and a probe 40, the probe 40 being movable along the direction of the line array antenna for receiving radiation signals output by the line array antenna in different directions.

Referring to fig. 1, in an embodiment of the present invention, an rf switch device includes:

the switch control signal access end is used for accessing an S parameter test switch signal, a radiation parameter test switch signal and a probe 40 starting signal;

the first input end of the switch array 10 is electrically connected with the first port of the vector network analyzer 30, the second input end of the switch array 10 is electrically connected with the second port of the vector network analyzer 30, the switch array 10 is provided with a plurality of output ends, one output end of the switch array is electrically connected with the probe 40, and the other output ends of the switch array are electrically connected with the ports of the array units;

the switch array 10 is configured to sequentially turn on a path between the ports of any two array units and the first port and the second port of the vector network analyzer 30 according to the S parameter test switch signal when receiving the S parameter test switch signal;

the switch array 10 is further configured to conduct a path between the second port of the vector network analyzer 30 and the probe 40 when receiving the probe 40 start signal; and when receiving the radiation parameter test switch signal, periodically switching the on/off between the first port of the vector network analyzer 30 and the plurality of line array units according to the radiation parameter test switch signal.

It will be appreciated that a multi-port line array antenna is made up of a plurality of array elements, i.e. small antennas, each having a port to form a multi-port line array antenna. When S parameter or radiation parameter detection needs to be performed on the multi-port line array antenna, detection needs to be performed on array units of each port once.

In this embodiment, the switch control signal input terminal may be an output terminal of the control circuit of the vector network analyzer 30 and an external terminal, or may be directly controlled by the external terminal.

It should be understood that since the vector network analyzer 30 usually has only two ports, when performing the S parameter test, only two ports, i.e., two array units, in the multi-port line array antenna can be subjected to the S parameter detection.

Thus, in this embodiment, the switch array 10 may sequentially turn on the paths between the first port and the second port and any two array units according to the S parameter test switch signal, and after the vector network analyzer 30 detects the current two array units, switch on the paths between the first port and the second port and another group of array units, and perform the S parameter test until the vector network analyzer 30 completes the S parameter test on any two array units in the plurality of array units. For example, the current multi-port line array antenna is 3 ports, that is, has three array units ABC, the switch array 10 initially switches on the path between the array unit a and the first port and then switches on the path between the array unit B and the second port under the control of the S parameter test switch signal, after the S parameter test by the vector network analyzer 30 is completed, the switch array 10 maintains the path between the array unit a and the first port and switches the second port to be switched to the array unit B, so that the detection of the S parameters of any two of the three array units is completed, that is the detection of the S parameters of the three-port line array antenna is completed.

It should be understood that, in the application of the actual multi-port line array antenna testing system, the vector network analyzer 30 outputs a testing signal to the multi-port line array antenna, and the probe 40 moves within a preset range (the preset range is set correspondingly for the user to detect the radiation angle according to the requirement) so as to collect the radiation signal radiated by the multi-port line array antenna and transmit the radiation signal back to the vector network analyzer 30, so that the vector network analyzer 30 detects the field intensity data of the radiation signal radiated by the multi-port line array antenna to different positions according to the radiation signal, that is, the radiation parameter detection of the multi-port line array antenna.

However, as can be seen from the above, the multi-port line array antenna test has a plurality of array units, and requires a radiation parameter detection for each array unit, which requires the probe 40 to repeat the round trip multiple times within the preset range, and requires a manual switch between the first port of the vector network analyzer 30 and the plurality of array units when a round trip is taken.

For this reason, in this embodiment, when the radiation parameter is detected, the switch array 10 accesses the radiation parameter test switch signal and the probe 40 start signal through the switch control signal access terminal, so that the second port is connected to the probe 40 to receive the radiation parameter collected by the probe 40, and during the movement of the probe 40, the on/off between the first port of the vector network analyzer 30 and the plurality of array units is periodically switched. Therefore, the original complete detection of each array unit is changed into the sampling of each array unit at a certain distance. At this time, the field intensity data capable of representing the radiation parameters of the whole array unit can be collected only by ensuring that the distance between two times of sampling of each array unit is less than one half of the shortest wavelength in the radio frequency signals of all frequencies. In this way, the probe 40 is only required to be in one stroke, so that the radiated radiation signal of each array unit can be acquired, and the vector network analyzer 30 obtains the radiation parameter of each array unit, namely the radiation parameter of the multi-port line array antenna.

The switch control signal access end is set to access an S parameter test switch signal, a radiation parameter test switch signal and a probe 40 starting signal, and when the switch array 10 receives the S parameter test switch signal, a channel between the ports of any two array units and the first port and the second port of the vector network analyzer 30 is sequentially conducted according to the S parameter test switch signal; and when receiving a starting signal of the probe 40, conducting a path between the second port of the vector network analyzer 30 and the probe 40, and periodically conducting the on-off between the first port of the vector network analyzer 30 and the plurality of line array units according to the radiation parameter test switch signal. Therefore, the S parameter and the radiation parameter of the multi-port line array antenna can be compatibly tested in the test of the multi-port line array antenna. Meanwhile, when the S parameter is tested, the connection between the first port and the second port of the vector network analyzer 30 and any two array units does not need to be adjusted manually and repeatedly, and when the radiation parameter is tested, the probe 40 does not need to perform an independent test on the array unit of each port repeatedly within a preset detection range, so that the testing efficiency is effectively improved.

Referring to fig. 2, in an embodiment of the present invention, the vector network analyzer 30 is configured to output a synchronous signal corresponding to the output of the test signal, and is characterized in that the radio frequency switch apparatus further includes a synchronous control circuit 20, an output terminal of the synchronous control circuit 20 is connected to the controlled terminal of the switch array 10, an input terminal of the synchronous control circuit 20 is connected to the synchronous terminal of the vector network analyzer 30, and the synchronous control circuit 20 is configured to be connected to an external terminal in a wired communication manner;

the synchronous control circuit 20 is configured to stop receiving the synchronous signal when receiving a channel switching instruction sent by an external terminal, and output a corresponding S parameter test switch signal according to the channel switching instruction;

the synchronous control circuit 20 is further configured to output a probe 40 start signal when a channel switching instruction sent by an external terminal is not received; and outputting a corresponding radiation parameter test switch signal according to the cycle of the synchronization signal output by the vector network analyzer 30, so as to control the switch array 10 to periodically turn on the first port of the vector network analyzer 30 and the plurality of line array units.

In this embodiment, the synchronous control circuit 20 may be implemented by an MCU, a DSP (Digital Signal processor), or an FPGA (Programmable Gate Array), for example, using an STM32F103VET6 demonstration board.

In this embodiment, the synchronous control circuit 20 is configured to output a corresponding S-parameter test switch signal under the control of a channel switching instruction of an external terminal, so that the vector network analyzer 30 completes the S-parameter test on any two array units in the array units, for example, the array units have three ABC, the synchronous control circuit 20 will control the switch array 10 to conduct a path between the first port of the vector network analyzer 30 and the array unit a and a path between the second port of the vector network analyzer 30 and the array unit B under the control of the external terminal, so that the vector network analyzer 30 performs the S-parameter test on the array units a and B, and after the test is completed, the switch array 10 is controlled according to the driving of the external terminal to conduct a path between the first port of the vector network analyzer 30 and the array unit a, and to disconnect a path between the second port of the vector network analyzer 30 and the array unit B and conduct the vector network analyzer 30 to make the vector network analyzer 30 perform S parameter test on the array units a and C, and after the test is completed, under the driving of the external terminal, according to the above process, the switch array 10 is controlled to conduct the path between the first port and the array unit B and the path between the second port and the array unit C to make the vector network analyzer 30 detect the S parameter between the array unit B and the array unit C.

It should be understood that, the vector network analyzer 30 is controlled by the external terminal to start and output a plurality of sets of test signals, and simultaneously outputs a plurality of sets of synchronization signals to the outside through the synchronization port (refer to fig. 7), each set of test signals includes radio frequency signals of a plurality of frequencies, and the transmission interval of the radio frequency signals of each frequency is constant. The cycle is repeated until the output of one set of test signals by the vector network analyzer 30 is stopped at a high level of the synchronization signal, until the output of the next set of test signals by the vector network analyzer 30 is stopped at a low level of the synchronization signal, and until the output of the next set of test signals is restarted at a high level of the synchronization signal.

In this embodiment, the synchronous control circuit 20 may switch and conduct a path between the first port and the next array unit according to the synchronous signal when the synchronous signal is at a low level, for example, switch and conduct a path between the first port and the array unit a when the synchronous signal of the first group is at a high level, switch and conduct a path between the first port and the array unit B when the synchronous signal of the first group is at a low level, switch and conduct a path between the first port and the array unit C when the synchronous signal of the second group is at a low level, and switch and conduct a path between the first port and the array unit a when the synchronous signal of the third group is at a low level, and repeat in this cycle until the probe 40 finishes forming, and finishes collecting and detecting the radiation parameter of the line array antenna.

By arranging the synchronous control circuit 20, the switch array 10 can be switched and conducted by the external terminal and the vector network analyzer 30 during S parameter testing and radiation parameter testing, so that the accuracy and stability of the control of the switch array 10 are improved, and the accuracy of the radio frequency switch device in testing the S parameters and the radiation parameters of the multi-port line array antenna is ensured. In addition, because the synchronous control circuit 20 switches on the paths between the first port and different array units according to the synchronous signal and switches when the synchronous signal is at a low level, that is, the vector network analyzer 30 does not output the test signal, more accurate radiation parameter data can be detected at the probe 40, and the accuracy of the radiation parameter detection of the multi-port line array antenna is ensured.

Referring to fig. 3, the array units are grouped in pairs, wherein the array units are grouped in pairs, and wherein the switch array 10 includes a plurality of groups of switch units 11 and a probe switch 12;

each group of switching units 11 comprises a first input switch, a second input switch and an output switch;

the controlled ends of the first input switch, the second input switch and the output switch are all electrically connected with the synchronous control circuit 20;

the input end of the first input switch is electrically connected with the first port of the vector network analyzer 30, and the input end of the second input switch is electrically connected with the second port of the vector network analyzer 30;

the output switch is provided with a first input end, a second input end, a first output end and a second output end, and conducts a path between the first input end and the first output end and a path between the second input end and the second output end under the condition that the output switch is not triggered; the output switch conducts a path between the first input end and the second output end and conducts a path between the second input end and the first output end under the condition of being triggered;

the output end of the first input switch is connected with the first input end of the output switch, the output end of the second input switch is connected with the second input end of the output switch, the first output end of the output switch is electrically connected with the port of one array unit of the array units, and the second output end of the output switch is electrically connected with the port of the other array unit of the array units;

the input end of the probe switch 12 is electrically connected with the second port of the vector network analyzer 30, the output end of the probe switch 12 is electrically connected with the probe 40, and the controlled end of the probe switch 12 is electrically connected with the synchronous control circuit 20.

In this embodiment, the input switch and the output switch may be mechanical switches, such as relays, or electronic switches, such as MOS transistors, IGBT transistors, triodes, electronic switch chips (integrated with multiple electronic switches), and the like. It is understood that the mechanical switch has good radio frequency performance and low cost, but the switching times are limited, and the switching speed is slow (15-20 ms). On the contrary, the electronic switch has slightly low radio frequency performance and high cost, but almost unlimited switching life and high switching speed. It should be understood that in practical applications, when performing S-parameter detection, the switching frequency between the input switch and the output switch is not fast, whereas when performing radiation parameter test, the high level time of the synchronization signal is relatively short, so the first input switch and the switching frequency are relatively fast. Therefore, in this embodiment, the first input switches are electronic switches, and a plurality of first input switches may be integrated into one electronic switch, for example, an electronic switch chip with a single input channel and multiple output channels, and the electronic switch chip may switch the conduction paths between the input terminals and the different output terminals under the control of the external control circuit. The second input switch, the output switch and the probe switch 12 are all mechanical switches, and the probe switch 12 and a plurality of second input switches can be integrated into one mechanical switch, for example, a single-pole multi-throw type switch is adopted. Therefore, the cost is reduced while the switching speed is ensured.

In another embodiment, if the number of array elements is odd, i.e. the number of ports of the multi-port line array antenna is odd, only one set of switch elements 11 needs to be configured for the remaining one array element.

Specifically, referring to fig. 4, four array units (ABCD), two sets of switch units 11, and one probe switch 12 are exemplified. The first input switches in the two groups of switch units 11 may be integrated together, and implemented by using an electronic switch SW1 with single-channel input and double-channel output. The second input switches of the two sets of switch units 11 may be implemented with a single pole double throw switch SW2 integrated with the probe switch 12. The output switches of the first group of switch units 11 are double-pole double-throw switches SWO3 (when not triggered, for example, the control signal received by SWO3 is low level, the first input terminal 1I of SW3 is conducted with the first output terminal 1O, and the second input terminal 2I of SWO3 is conducted with the second output terminal 2O, when SW3 is triggered, for example, the control signal received by SWO3 is high level, and is switched to conduct the first input terminal 1I and the second output terminal 2O, and conduct the second input terminal 2I and the first output terminal 1O), and the output switches of the second group of switch units 11 are also double-pole double-throw switches SWO 4. The first port is connected to the input IN of SW1, the second port is connected to the input IN of SW2, the first input 1I of SWO3 is connected to the first output 1O of SW1, the first output 1O of SWO3 is connected to array cell a, the second input of SWO3 is connected to the first output 1O of SW2, the second output of SWO3 is connected to array cell B, the first input 1I of SWO4 is connected to the second output section 2O of SW1, the first output of SWO4 is connected to array cell C, the second input 2I of SWO4 is connected to the second output 2O of SW2, the second output 2O of SWO4 is connected to array cell D, and the third output 3O of SW2 is connected to probe 40. The controlled terminals of SW1, SW2, SWO3 and SWO4 are all electrically connected to the synchronization control circuit 20.

When the S parameter test is performed, the external terminal outputs a channel switching command to stop the synchronization control circuit 20 from receiving the synchronization signal. The synchronous control circuit 20 outputs an S-parameter test switch signal to control the input terminal 1N of the SW1 to be connected to the first output terminal 1O, the input terminal 1IN of the SW2 to be connected to the first output terminal 1O, the first input terminal IN of the SWO3 to be connected to the first output terminal 1O, and the second input terminal 2N of the SWO4 to be connected to the second output terminal 2O, so that the first port is connected to the array cell a and the second port is connected to the array cell B. Meanwhile, the external terminal controls the vector network analyzer 30 to start the S-parameter test, and the vector network analyzer 30 outputs a test signal through the first port according to the control of the external terminal, and receives the reflection parameter of the array cell a through the first port (S11) and the transmission parameter transmitted to the array cell B through the array cell a through the second port (S12). Then, the vector network analyzer 30 outputs the test signal through the second port, and receives the reflection parameter of the array cell B through the second port (S22) and the transmission parameter of the array cell B transmitted to the array cell a through the first port (S21). In the course of performing the S parameter test of the array unit a and the array unit B, the vector network analyzer 30 simultaneously uploads the parameters of S11, S12, S21, and S22 to the external terminal through wired communication. After the S parameter tests of the array unit a and the array unit B are completed, the external terminal outputs a channel switching command to drive the synchronous control circuit 20 to output the input terminal 1IN of the S parameter test switch signal SW2 to be switched to be connected with the second output terminal 2O, and simultaneously triggers the SWO4 to operate, so that the second input terminal 2N of the SWO4 is switched to be connected with the first output terminal 1O, and the first input terminal 1N of the SWO4 is switched to be connected with the second output terminal 2O, so that the first port is connected with the array unit a, and the second port is connected with the array unit C. Meanwhile, the external terminal controls the vector network analyzer 30 to perform the S parameter test as described above, and after the S parameter tests of the array unit a and the array unit C are completed. And repeating the implementation process, and sequentially enabling the first port and the second port to be communicated with the array unit A, the array unit B, the array unit A, the array unit C, the array unit A, the array unit D, the array unit B, the array unit C, the array unit B, the array unit D, the array unit C and the array unit D, so as to complete the test of the S parameter.

And when the radiation parameter test is carried out, the external terminal does not output a channel switching instruction. At this time, the synchronization control circuit 20 switches the input terminal IN of the start signal SW2 of the output probe 40 to be connected to the third output terminal 3O when receiving the synchronization signal, so as to connect the second port to the probe 40. Meanwhile, the synchronous control circuit 20 outputs the radiation parameter test switch signal to control the input terminal IN of the SW1 to be connected to the first output terminal 1O and the first input terminal IN of the SWO3 to be connected to the first output terminal IO to turn on the path between the first port and the array unit a when the first group of synchronous signals is at a high level according to the synchronous signal (refer to fig. 7). At this time, the synchronization signal is in a high level state, the vector network analyzer 30 outputs a test signal to the array unit a, and the probe 40 collects a radiation signal radiated by the array unit a during the moving process and outputs the radiation signal to the second port of the vector network analyzer 30, so that the vector network analyzer 30 detects field intensity data of the radiation signal and transmits the field intensity data back to the external terminal.

At the low level of the first group of synchronization signals, the synchronization control circuit 20 outputs a control signal to the SWO3 to trigger the SWO3 to switch, so that the first input terminal IN of the SWO3 is switched to be connected with the second output terminal 2O, and the second input terminal 2N of the SWO3 is switched to be connected with the first output terminal 1O, thereby turning on the path between the first port and the array cell B. Then, when the synchronization signal of the second group returns to the high level, the vector network analyzer 30 outputs the test signal to the array unit B again, and the probe head 40 detects the test signal radiated from the array unit a during the movement. When the sync signal of the second group is at low level, the sync control circuit 20 controls the input terminal IN of the SW1 to switch to be connected to the second output terminal 2O, and the first input terminal IN of the SWO4 to be connected to the first output terminal IO, thereby turning on the path between the first port and the array cell C, and repeating the above radiation parameter test procedure when the sync signal of the third group is at high level, and then activates the SWO4 when the sync signal of the third group is at low level, thereby switching the first input terminal IN of the SWO4 to be connected to the second output terminal 2O, and switching the second input terminal 2N of the SWO4 to be connected to the first output terminal 1O, thereby turning on the path between the first port and the array cell D, and repeating the above radiation parameter test procedure when the sync signal of the fourth group is at high level. At this time, when the synchronizing signal of the fourth group is at a low level, the first port and the array unit a are turned on, and the above process is repeated, and the on-off state between the first port of the vector network analyzer 30 and the plurality of line array units is periodically switched until the multi-port line array antenna test system finishes the detection of the radiation parameters.

Through the arrangement, the radio frequency switch device can realize the test of the S parameter and the radiation parameter of the compatible line array antenna, has simple circuit structure and lower cost, is easy to be suitable for the test of the S parameter and the radiation parameter of the multi-port line array antenna, and improves the test efficiency.

Referring to fig. 5, the present invention also provides a multi-port line array antenna test system, which includes a vector network analyzer 30, an external terminal, a probe 40, a driving assembly 50, a position detecting device 60, and a radio frequency switching device as described in any one of the above;

the radio frequency switch device is respectively and electrically connected with the vector network analyzer 30, the probe 40 and the linear array antenna;

the vector network analyzer 30 is electrically connected with the radio frequency switch device, and the vector network analyzer 30 is used for being in communication connection with an external terminal;

the probe 40 is electrically connected with the radio frequency switch device, and the probe 40 is also in driving connection with the driving assembly 50;

the driving assembly 50 is used for being in communication connection with an external terminal;

the position detection device 60 is used for being in communication connection with the external terminal;

in this embodiment, the external terminal may be a computer or the like. The vector network analyzer 30, the probe 40, the driving component 50 and the position detection device 60 can be internally provided with a wireless communication module, and establish communication connection with an external terminal through wireless communication networks such as WIFI, 4G/5G, a local area network and a wireless network, so as to realize data transmission and control; and communication connection CAN be established with an external terminal through a communication cable according to wired communication protocols such as RS485, RS233 and CAN, so that data transmission and control are realized.

In this embodiment, the position detection device 60 may be a positioning detection device such as a grating, a magnetic grating, an encoder, or a radar detection device, and may directly detect the coordinate position of the probe 40 within a preset range. The position detecting device 60 may also be implemented by an encoder, the driving assembly 50 may include a guide rail 51, the guide rail 51 is disposed along the length direction of the line array antenna, the stroke of the guide rail 51 is a preset range, and the probe 40 may be driven by the driving assembly 50 to move on the guide rail 51. The encoder can detect the current position of the probe 40 moving on the guide rail 51 and report to the external terminal. The external terminal can calculate the position of the probe 40 relative to the line array antenna, for example, the angle of the probe 40 relative to the center position of the line array antenna, according to the parameter preset by the user, for example, the height of the probe 40 from the line array antenna, where the angle is the different radiation angle of the line array antenna on the vertical main tangent plane (the vertical tangent plane of the axis position in the line array antenna) because the current probe 40 is located right above the central axis of the line array antenna. The length of the preset test region may be greater than the length of the line array antenna, or may be smaller than the length of the line array antenna, so that the probe 40 may detect the radiation signal between different radiation angles according to the requirement of the user.

The external terminal is used for outputting a channel switching instruction to the radio frequency switch device when the linear array antenna S parameter test is carried out; and controlling the vector network analyzer 30 to output a test signal to perform S parameter test on the line array antenna and to transmit an S parameter test result back to the external terminal.

In this embodiment, the external terminal may be a personal computer, and when a user operates the external terminal to perform S parameter detection on the prior array antenna, the external terminal outputs a channel switching instruction to the synchronous control circuit 20, so that the synchronous control circuit 20 controls the radio frequency switch device, and simultaneously controls the vector network analyzer 30 to start performing S parameter tests, and after a group of S parameter tests are completed, the synchronous control circuit 20 switches the radio frequency switch device to conduct a path between any two array units and the vector network analyzer 30 as in the above embodiment, so that the external terminal can receive S parameters of the entire line array.

The external terminal is also used for controlling the vector network analyzer 30 to send a test signal to the linear array antenna when the linear array antenna radiation parameter test is carried out; the driving component 50 is controlled to drive the probe 40 to move within a preset range, so that the probe 40 receives radiation signals emitted by the line array antenna within the preset range to different positions and outputs the radiation signals to the vector network analyzer 30; and, controlling the position detection device 60 to detect the position of the probe 40 and return a position detection signal to the external terminal;

the vector network analyzer 30 is further configured to obtain field intensity data of the radiation signals emitted by the wire array antenna in the preset range to different positions, and upload the field intensity data to the external terminal, so that the external terminal generates near-field intensity distribution data of the wire array antenna according to the position detection signal and the field intensity data of the radiation signals emitted by the wire array antenna in the preset range to different positions.

In this embodiment, the probe 40 may adopt a single probe 40, or may adopt an array of probes 40, and is configured to scan the preset test area under the driving of the driving assembly 50, and since the detection object is a line array antenna, in practical application, the probe 40 may be disposed directly above the line array antenna, for example, directly above a central axis of the line array antenna, and move along a length direction of the line array antenna. The probe 40 in motion can collect radiation signals emitted by the line array antenna to different locations and output them to the vector network analyzer 30. The vector network analyzer 30 measures a vector value of the field intensity of its radiation signal and uploads it to an external terminal.

In this embodiment, when the user operates the external terminal to detect the radiation parameters of the antenna array, the external terminal outputs a stop channel switching command to the synchronization control circuit 20. And controls the vector network analyzer 30 to start outputting test signals to the rf switching device, and controls the driving assembly 50 to drive the probe 40 to move along the length direction of the line array antenna. At this time, according to the above embodiment of the rf switch device, the rf switch device alternately turns on the path between each array unit and the vector network analyzer 30 during the low level period of the synchronization signal, so that the external terminal can simultaneously measure the radiation parameters of all the array units after the control probe 40 finishes one trip.

Through the setting, the compatible test of the S parameter and the radiation parameter of the line array antenna can be effectively realized, the whole system occupies small space, the setting cost is low, the test efficiency is high, and the accuracy of the multi-port line array antenna test can be effectively improved. So, in practical application, to the producer, need not to build the great traditional check out test set of volume again for detecting the linear array antenna of dispatching from the factory, shortened the time of detecting a linear array antenna simultaneously, improved the detection efficiency of linear array antenna, and then improved the efficiency that the linear array antenna dispatched from the factory.

Referring to fig. 5, in one embodiment of the present invention, the multi-port array antenna test system further includes a polarizer 70.

The polarizer 70 is electrically connected to the probe 40, and the polarizer 70 is used for communicating with an external terminal, and changing the polarization of the probe 40 according to external terminal control when detecting radiation parameters of the line array antenna, so that the probe 40 receives radiation signals of different polarizations emitted by the line array antenna in a preset test area to different positions.

In this embodiment, the driving component 50 is further configured to drive the scanning device to reciprocate along the length direction of the line array antenna according to the transmission signal output by the external terminal, so that the scanning device receives the radiation signals of two polarizations of the line array antenna. Because the line array antenna is often a dual-polarized line array antenna, two polarizations of the antenna need to be detected, changing the polarization of the probe 40 can be realized by adopting the polarizer 70, the polarizer 70 can adopt a polarization motor, the polarization motor can be controlled by an external terminal, after the drive assembly 50 drives the probe 40 to travel a stroke, the external terminal can control the polarization motor to change the polarization of the probe 40, and then the drive assembly 50 is controlled to drive the probe 40 to move reversely to a stroke starting point along the stroke, so that the acquisition of radiation signals of the two polarizations of the line array antenna is completed. The polarizer 70 may also adopt a dual-polarized probe 40, and if the dual-polarized probe 40 is adopted, the acquisition of two polarized radiation signals of the line array antenna can be completed in the process of one stroke.

Referring to fig. 5, in an embodiment of the invention, the predetermined range has a first position and a second position, and the length direction of the line array antenna is consistent with the direction from the first position to the second position. The driving assembly 50 includes:

a guide rail 51, the guide rail 51 extending in the direction of the first position and the second position.

The transmission member 52 is disposed on the guide rail 51, and the probe 40 and the polarizer 70 are disposed on the transmission member 52.

And a driving member 53, wherein the driving member 53 is used for being in communication connection with an external terminal, and the driving member 53 is used for driving the transmission member 52 to move on the guide rail 51 under the control of the external terminal.

In the present embodiment, the guide rail 51 is provided with a component for guiding the movement of the transmission member 52, such as a rack, a sliding groove, a cylinder, etc., and one end of the transmission member 52 may be provided with a transmission device, which is correspondingly connected with the component for guiding the movement of the transmission member 52 on the guide rail 51, such as a rotating gear disposed corresponding to the rack and a sliding block disposed corresponding to the sliding groove. The driving member 53 may be a servo motor and a servo driver, the servo driver may establish a wired communication connection with an external terminal through a wired communication network, such as an RS-233 communication network, an RS485 communication network, a CAN communication network, or may establish a wireless communication connection with an external terminal through a wireless communication network, such as a WIFI, a lan, a bluetooth, a 4G/5G communication network, and the external terminal may control the servo driver through the communication connection with the servo driver and drive the servo motor to work, so as to drive the driving member 52 to move on the guide rail 51 along the length direction of the line array antenna, thereby driving the probe 40 and the polarizer 70 disposed on the driving member 52 to move along the central axis of the line array antenna in the length direction.

Through the arrangement, the detection of the near field intensity of the radiation signals output by the different positions of the line array antenna can be realized, the occupied space is small, and the convenience and the efficiency of the detection of the radiation parameters of the prior array antenna are effectively improved.

It will be appreciated that the user can also set the distance between the probe 40 and the line array antenna, the drive 52 can be connected to the probe 40 via a metal rod, and the drive 53 can control the metal rod to move up and down in the vertical direction according to the height control signal output from the external terminal, thereby changing the distance between the probe 40 and the line array antenna.

Ideally, the external terminal receives the field intensity data of the radiation signal and correspondingly receives the position detection signal (the current radiation angle is obtained by calculation) corresponding to the field intensity data of the radiation signal, so as to form near-field intensity distribution data of the line array antenna. However, in practical application, because of delay in signal transmission and processing, the time sequence of the field intensity data of the radiation signal and the position detection signal may be misaligned, that is, the time sequence of the field intensity data of the radiation signal and the radiation angle may be misaligned, which causes the finally formed near-field intensity distribution data to be misaligned, and the test result has an error.

Referring to fig. 6, in an embodiment of the present invention, the multi-port line array antenna testing system further includes a synchronization device 80, and the synchronization device 80 is electrically connected to the vector network analyzer 30 and the position detection device 60, respectively. The synchronizer 80 is used for communication connection with an external terminal.

The synchronizer 80 is configured to store the currently detected position detection signal of the position detection device 60 and transmit the position detection signal to the external terminal at the time of the rising edge of the synchronization signal corresponding to each set of test signals during the radiation parameter detection. And, at the falling edge of the synchronizing signal corresponding to each set of test signals, storing the position detection signal currently detected by the position detection device 60 and uploading it to the external terminal, so that the external terminal synchronizes the field intensity data of the radiation signal output by the vector network analyzer 30 corresponding to the position detection signal output by the position detection device 60.

In this embodiment, the vector network analyzer 30 is further configured to output a plurality of synchronous signals correspondingly and synchronously when outputting a plurality of sets of test signals, where each set of test signals corresponds to one synchronous signal, and each set of test signals is composed of radio frequency signals with a plurality of frequencies. The frequencies in each group are of the same duration during the scan.

It should be understood that the test signal output by the vector network analyzer 30 is composed of rf signals of multiple frequencies, and the intervals of the rf signals of each frequency are also consistent. In practical use, parameters such as frequency, power and intermediate frequency bandwidth of a plurality of radio frequency signals in a set of test signals output by the vector network analyzer 30 can be set through an external terminal. The terminal can measure the time required by each group of measurement, and the time is taken as a parameter for calculating the movement speed of the scanning device, thereby ensuring that the sampling interval is less than half wavelength.

Referring to fig. 7, for example, if the total time for outputting a group of test signals is 100ms, and there are 10 frequency signals (f1-f10), the time for outputting each frequency signal is 10ms, and the vector network analyzer 30 starts to output a synchronization signal when outputting the signal with the frequency of f1, and continues to output the signal with the frequency of f 10. At this time, the network vector analyzer stops outputting the test signal to the line array antenna, which means that the synchronous signal is stopped outputting at the same time. And after a period of time, the next group of test signals are continuously output outwards, and a synchronous signal is correspondingly output in the same way. The synchronization signal is typically a pulse signal. A high level may indicate that a measurement is being made and a low level may indicate that no measurement is being made. The reverse is also possible. For simplicity of illustration, this description only uses a high level to illustrate the process as indicating that a measurement is being taken.

In the present embodiment, the synchronization device 80 is used to store the position detection signal currently detected by the position detection device 60 and upload it to the external terminal at the time of the rising edge of the synchronization signal corresponding to each set of test signals. And, at the falling edge of the synchronizing signal corresponding to each set of test signals, storing the position detection signal currently detected by the position detection device 60 and uploading it to the external terminal, so that the external terminal synchronizes the field intensity data of the radiation signal output by the vector network analyzer 30 corresponding to the position detection signal output by the position detection device 60.

Specifically, the synchronizer 80 may be implemented by an MCU (micro controller unit), a DSP (Digital Signal processing chip), or an FPGA (Field Programmable Gate Array), for example, using an STM32F103VET6 demonstration board. The synchronizer 80 is electrically connected to the vector network analyzer 30 and the position detecting device 60, respectively, and stores and uploads the current position detection signal to the external terminal at the rising edge of the synchronization signal. And storing the current position detection signal and uploading the current position detection signal to the external terminal when the synchronous signal falls.

Specifically, taking the total time of the test signal as 10ms and a total of 5 frequency signals (f1-f5) as an example, when the vector network analyzer 30 starts to operate, i.e., starts to output f1, the synchronizer 80 detects the rising edge of the synchronization signal, stores the current position detection signal, i.e., when the vector network analyzer 30 finishes outputting f5, the synchronizer 80 detects the falling edge of the synchronization signal, stores the current position signal, i.e., when the current probe 40 position is 5mm, and uploads the current position detection signal to the external terminal, i.e., the external terminal knows that the current probe 40 position is 5 mm.

Since the signals (f1-f5) with 5 frequencies are set by the external terminal, when the external terminal controls the vector network analyzer 30 to start working, the field intensity data of the 5 radiation signals received by the vector network analyzer 30 sequentially correspond to the radio-frequency signals with the frequencies of f1 to f5 output to the line array antenna by the vector network analyzer 30.

At this time, based on the information reported by the synchronizer 80, the external terminal has already determined that the position of the probe 40 is 0mm when the output of the signal of the f1 frequency is started at present, the position of the probe 40 is 5mm when the output of the signal of the f5 frequency is finished, and the interval time of the known frequencies is the same, so the vector network analyzer 30 outputs the signal of the f1 frequency when the position of the probe 40 is 1mm, outputs the signal of the f2 frequency when the position of the probe 40 is 2mm, outputs the signal of the f3 frequency when the position of the probe 40 is 3mm, outputs the signal of the f4 frequency when the position of the probe 40 is 4mm, and outputs the signal of the f5 frequency when the position of the probe 40 is 5 mm. Then, the external terminal may correspond the sequentially received field intensity data values (a-E) of the radiation signals output by the 5 vector network analyzers 30 to the positions of the 5 probes 40, that is, the field intensity value a is 1mm, the field intensity value B is 2mm, the field intensity value C is 3mm, the field intensity value D is 4mm, and the field intensity value E is 5 mm. In this way, the external terminal can match the position and field strength of the probe 40, thereby avoiding misalignment due to transmission delay.

Through the arrangement, the time sequence of the field intensity data of the radiation signals caused by signal transmission delay can be effectively prevented from being unmatched with the detection position where the current probe 40 is located, namely the radiation angle of the line array antenna, and the accuracy of the radiation parameter detection of the line array antenna is improved.

It will be appreciated that the synchronization device 80 may be directly the synchronization control circuit 20 in the rf switching device, thereby reducing the cost of system construction.

Referring to fig. 5 and 6, in an embodiment of the present invention, the multi-port line array antenna test system further includes a darkroom;

wherein, the probe 40, the polarizer 70, the driving assembly 50, the position detecting device 60, the radio frequency switch device and the synchronizing device 80 are all arranged in the darkroom; the inner wall of the darkroom is provided with a top surface and a plurality of peripheral side surfaces connected with the top surface, and the top surface and at least one peripheral side surface are provided with wave-absorbing materials.

It is to be understood that since the ambient field strength is often present in the test environment, the line array antenna needs to be placed in a dark room for testing in order to shield the ambient field strength from the test result.

In practical application, the base station antenna of 1-4 generations adopts line array antenna more, and base station antenna in the in-service use, main radiation direction is first half space, and it is less to radiate dorsad, so only need be provided with absorbing material at the top of darkroom and a side, just can satisfy the demand to line array antenna near field intensity detection accuracy.

Through the arrangement, the influence of the external electromagnetic environment can be shielded, and the accuracy of the detection of the near field strength of the linear array antenna is improved. Meanwhile, according to the practical use characteristics of the base station antenna, wave-absorbing materials can be arranged on the top surface and one side inside the darkroom, so that the system construction cost is effectively reduced.

It should be noted that, since the line array antenna detection system of the present invention is based on the multi-port line array antenna test system, the embodiments of the line array antenna detection system of the present invention include all technical solutions of all embodiments of the multi-port line array antenna test system, and the achieved technical effects are also completely the same, and are not described herein again.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.