阅读说明：本技术 一种准八木天线阵列及毫米波基站设备 (Quasi-yagi antenna array and millimeter wave base station equipment ) 是由 王世华 丁屹 邓超平 刘志勇 于 2019-04-25 设计创作，主要内容包括：本发明提供了一种准八木天线阵列及毫米波基站设备,该准八木天线阵列包括层叠且间隔设置的至少两个射频板,每个射频板设置有至少一个射频通道、以及阵列排列的至少两个准八木天线单元,且每个射频通道对应至少一个准八木天线单元。每个准八木天线单元包括与至少一个射频通道中的一个射频通道电连接的巴伦结构、与巴伦结构电连接的有源阵子、以及位于有源阵子一侧且背离巴伦结构的至少一个无源阵子。通过层叠且阵列排列形成的准八木天线阵列,扩充准八木天线阵列的工作带宽。便于天线与射频板的一体化,减小基站设备尺寸,提高准八木天线阵列的天线增益,减少传输损耗。通过加入巴伦结构以实现不平衡至平衡转换,实现准八木天线单元宽带特性。(The invention provides a quasi-yagi antenna array and millimeter wave base station equipment, wherein the quasi-yagi antenna array comprises at least two stacked and spaced radio frequency plates, each radio frequency plate is provided with at least one radio frequency channel and at least two quasi-yagi antenna units arranged in an array, and each radio frequency channel corresponds to at least one quasi-yagi antenna unit. Each quasi-yagi antenna element includes a balun structure electrically connected to one of the at least one radio frequency channels, an active array electrically connected to the balun structure, and at least one passive array located on a side of the active array facing away from the balun structure. The quasi-yagi antenna array formed by stacking and array arrangement expands the working bandwidth of the quasi-yagi antenna array. The antenna and the radio frequency board are convenient to integrate, the size of base station equipment is reduced, the antenna gain of the quasi-yagi antenna array is improved, and the transmission loss is reduced. By adding the balun structure, unbalanced-to-balanced conversion is realized, and the broadband characteristic of the quasi-yagi antenna unit is realized.)

1. A quasi-yagi antenna array, comprising:

the antenna comprises at least two radio frequency boards which are stacked and arranged at intervals, wherein each radio frequency board is provided with at least one radio frequency channel and at least two quasi-yagi antenna units which are arranged in an array mode, and each radio frequency channel corresponds to at least one quasi-yagi antenna unit;

Each quasi-yagi antenna element comprises: a balun structure electrically connected to the corresponding radio frequency channel; an active array electrically connected to the balun structure; at least one passive array located on one side of the active array and facing away from the balun structure.

2. The quasi-yagi antenna array of claim 1, wherein the balun structure comprises an impedance matching section electrically connected to the corresponding radio frequency channel and to the active array element, and a phase shifter electrically connected to the impedance matching section.

3. The quasi-yagi antenna array of claim 2, wherein the phase shifter inner edge angle is 90 ° and the phase shifter outer edge angle is 45 ° chamfer.

4. The quasi-yagi antenna array of claim 2, wherein said phase shifter is a wideband 180 ° phase shifter and said impedance matching section is a quarter-wavelength impedance matching section at an operating frequency of said quasi-yagi antenna elements.

5. The quasi-yagi antenna array according to any one of claims 1-4, wherein the length of the passive array is smaller than that of the active array, and the length of the passive array is 0.3-0.5 wavelength at the operating frequency of the quasi-yagi antenna unit;

And the distance between the active array and the passive array closest to the active array is 0.15-0.25 wavelength of the quasi-yagi antenna unit under the working frequency.

6. The quasi-yagi antenna array of claim 5, wherein each rf board comprises a plurality of conductive layers providing the at least one rf channel, and a single conductive layer providing the at least two quasi-yagi antenna elements, wherein the single conductive layer is on the same conductive layer as one of the plurality of conductive layers.

7. The quasi-yagi antenna array of claim 5, wherein the spacing between any two adjacent RF boards is 0.5-0.9 wavelength at the operating frequency of the quasi-yagi antenna element.

8. The quasi-yagi antenna array of claim 7, wherein a wedge-shaped locking strip for adjusting the distance between two adjacent rf plates is disposed between two adjacent rf plates.

9. Millimeter wave base station equipment comprising a quasi-yagi antenna array according to any of claims 1 to 8.

10. The millimeter-wave base station device of claim 9, further comprising:

a backplane connected to the at least two radio frequency boards;

The intermediate frequency plate is connected with the back plate;

the back plate, the radio frequency board with the intermediate frequency board just is used for the metallic cover of shielding, wherein, be provided with on the metallic cover and be used for the radiation window of accurate yagi antenna unit radiation.

Technical Field

The invention relates to the technical field of communication, in particular to a quasi-yagi antenna array and millimeter wave base station equipment.

Background

The 5G mobile communication system is a wide-coverage, high-capacity, multi-connection, low-delay and high-reliability network, and the millimeter wave frequency band is taken as a carrying frequency band of 5G peak flow and is an important component of a 5G spectrum strategy. The 5G millimeter wave communication system is mainly applied to large bandwidth and high capacity, and the application scene covers hot spot areas such as large stadiums, shopping malls, airplanes, railway stations and the like. The 5G millimeter wave experimental frequency band released by the Ministry of industry and communications in China is 24.25-27.5 GHz, and the bandwidth is 3.25 GHz. If the millimeter wave base station equipment uses a single antenna to cover all the 5G high-frequency experimental frequency bands in China, the requirement on bandwidth is difficult to meet.

Disclosure of Invention

The invention provides a quasi-yagi antenna array and millimeter wave base station equipment, which are used for improving the bandwidth of an antenna.

In a first aspect, the present invention provides a quasi-yagi antenna array, which includes at least two stacked and spaced radio frequency boards, each radio frequency board is provided with at least one radio frequency channel, and at least two quasi-yagi antenna units arranged in an array, where each radio frequency channel corresponds to at least one quasi-yagi antenna unit. Each quasi-yagi antenna element comprises a balun structure electrically connected with the corresponding radio frequency channel, an active array electrically connected with the balun structure, and at least one passive array positioned on one side of the active array and facing away from the balun structure.

In the above technical solution, at least one rf channel and at least two quasi-yagi antenna units electrically connected to the at least one rf channel and arranged in an array are disposed on each of at least two stacked and spaced rf boards, so as to expand the operating bandwidth of the quasi-yagi antenna array. By adopting the arrangement mode, a stacked design mode is not required, so that the antenna and the radio frequency board are convenient to integrate, and the size of the base station equipment is reduced. The mode of integrating a plurality of quasi-yagi antenna units arranged in an array on the radio frequency board can improve the antenna gain and the receiving sensitivity of the quasi-yagi antenna array, and a radio frequency connector is not needed to be used for connecting a radio frequency cable and an antenna, so that the transmission loss is reduced. A balun structure is added into the quasi-yagi antenna unit to realize the conversion from unbalance to balance, so that the broadband characteristic of the quasi-yagi antenna unit is realized.

In a specific embodiment, the balun structure includes an impedance matching section electrically connected to the corresponding radio frequency channel and electrically connected to the active array element, and a phase shifter electrically connected to the impedance matching section. Through the arranged impedance matching section and the phase shifter, the phase and the amplitude of each quasi-yagi antenna unit can be conveniently controlled, so that a large-scale active array antenna is formed.

In one embodiment, the inner edge angle of the phase shifter is 90 ° and the outer edge angle of the phase shifter is 45 ° cut to ensure more uniform propagation of electromagnetic energy and thus broadband characteristics.

In a specific embodiment, the phase shifter is a broadband 180 ° phase shifter, and the impedance matching section is a quarter-wavelength impedance matching section at the operating frequency of the quasi-yagi antenna unit, so that a signal transmitted from the radio frequency channel is divided into two paths of signals with equal amplitude and opposite phase to feed the active oscillator.

In a specific embodiment, the length of the passive array is smaller than that of the active array, and the length of the passive array is 0.3-0.5 wavelength of the quasi-yagi antenna unit under the working frequency. And the distance between the active array and the passive array closest to the active array is 0.15-0.25 wavelength under the working frequency of the quasi-yagi antenna unit. In one embodiment, the length of the passive array is 0.4 wavelength at the operating frequency of the quasi-yagi antenna unit, and the distance between the active array and the passive array closest to the active array is 0.2 wavelength at the operating frequency of the quasi-yagi antenna unit, so that the radiation direction of the quasi-yagi antenna unit points to the passive array.

In a specific embodiment, the number of passive elements is one.

In one embodiment, each rf channel is electrically connected to two quasi-yagi antenna elements to improve the antenna gain of the single rf channel and to compress the beamwidth.

In a specific embodiment, each rf board includes multiple conductive layers providing at least one rf channel and a single conductive layer providing at least two quasi-yagi antenna elements. The single-layer conducting layer and one conducting layer in the multiple conducting layers are located on the same conducting layer.

In a specific embodiment, the distance between any two adjacent radio frequency boards is 0.5-0.9 wavelength at the operating frequency of the quasi-yagi antenna unit.

In a specific embodiment, a wedge-shaped locking strip for adjusting the distance between two adjacent radio frequency plates is arranged between two adjacent radio frequency plates.

In a second aspect, the present invention further provides a millimeter wave base station device, where the millimeter wave base station device includes any one of the quasi-yagi antenna arrays described above. By adopting the quasi-yagi antenna array mode, the bandwidth covered by the millimeter wave base station equipment during working is expanded. By adopting the arrangement mode, a stacked design mode is not required, so that the antenna and the radio frequency board are convenient to integrate, and the size of the millimeter wave base station equipment is reduced. By adopting the mode of integrating the plurality of quasi-yagi antenna units arranged in an array on the radio frequency board, the antenna gain and the receiving sensitivity of the quasi-yagi antenna array can be improved, and a radio frequency connector is not required to be used for connecting a radio frequency cable and an antenna, so that the transmission loss is reduced.

In a specific embodiment, the millimeter wave base station device further includes a back plate connected to the at least two radio frequency boards, an intermediate frequency board connected to the back plate, and a metal cover including the back plate, the radio frequency boards, and the intermediate frequency board and used for shielding, wherein a radiation window for radiation of the quasi-yagi antenna unit is disposed on the metal cover, so as to implement connection between the radio frequency boards and the intermediate frequency board, and radiation of the quasi-yagi antenna array.

Drawings

Fig. 1 is a schematic diagram of a quasi-yagi antenna array according to an embodiment of the present invention;

fig. 2 is a top view of a radio frequency board according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a radio frequency board according to an embodiment of the present invention;

fig. 4 is a top view of a quasi-yagi antenna unit according to an embodiment of the present invention;

fig. 5 is a bottom view of a quasi-yagi antenna unit according to an embodiment of the present invention;

fig. 6 is a schematic diagram of an S parameter of a quasi-yagi antenna unit according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a card module according to an embodiment of the present invention;

FIG. 8 is a front view of a card module provided by an embodiment of the present invention;

fig. 9 is a schematic diagram of a millimeter wave base station device according to an embodiment of the present invention.

Reference numerals:

10-radio frequency board 101-first radio frequency board 102-second radio frequency board

11-multilayer conductive layer 12-single conductive layer 13-radio frequency channel

14-quasi-yagi antenna unit 15-balun structure 151-impedance matching section

1511-first impedance matching section 1512-second impedance matching section

152-phase shifter 1521-inside edge angle 1522-outside edge angle

16-active array 161-first active array 162-second active array

17-passive array 18-reflector 20-board card module

21-first frame 22-second frame 23-third frame

24-wedge locking bar 241-first wedge block 242-second wedge block

240-screw 30-back plate 40-intermediate frequency plate

50-metal shield 51-radiation window 60-quasi-yagi antenna array

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, 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.

For convenience of understanding the quasi-yagi antenna array provided in the embodiments of the present invention, an application scenario of the quasi-yagi antenna array is first described, and the quasi-yagi antenna array is applied to a wireless communication base station device to implement radiation and reception of radio waves. The yagi antenna array will be described in detail below with reference to the drawings.

Referring to fig. 1, the quasi-yagi antenna array includes at least two stacked and spaced radio frequency boards 10. In a specific arrangement, the number of the at least two radio frequency boards 10 may be at least two, such as 2, 3, 4, and the like, for example, the quasi-yagi antenna array shown in fig. 1 includes 8 radio frequency boards 10 stacked and spaced.

When each rf board 10 is specifically arranged, as shown in fig. 2, the rf board 10 includes a plurality of conductive layers 11 provided with at least one rf channel 13, wherein the number of conductive layers may be specifically at least two, such as 2 layers, 3 layers, 4 layers, and the like. As shown in fig. 2, the number of the radio frequency channels 13 disposed on the radio frequency board 10 may be at least one of 1, 2, 3, and the like, and as shown in fig. 2, 8 radio frequency channels 13 are disposed on the radio frequency board 10. In a specific setting, each radio frequency channel 13 is provided with a transmitting interface (TX) and a receiving interface (RX) for connecting with the outside, and a radio frequency link electrically connected with the transmitting interface and the receiving interface, so as to perform information interaction with the outside.

With continued reference to fig. 2, each rf board 10 further includes a single conductive layer 12 having at least two quasi-yagi antenna elements 14 disposed thereon, and the single conductive layer 12 is disposed on the same conductive layer as one of the multiple conductive layers 11. In particular, the single conductive layer 12 extends from one of the multiple conductive layers 11 to one side of the rf board 10 to form a clearance area for radiation from the quasi-yagi antenna element 14. Specifically, as shown in fig. 3, the single conductive layer 12 is located at the same conductive layer as the uppermost conductive layer (with reference to the position shown in fig. 2) of the multiple conductive layers 11, that is, the single conductive layer 12 extends from the uppermost conductive layer of the multiple conductive layers 11 to one side of the rf board 10. By adopting the above arrangement, the multilayer conductive layer 11 on the radio frequency board 10 can be used as a part of the reflection plate of the quasi-yagi antenna unit 14, so as to ensure the radiation performance of the quasi-yagi antenna array. It should be understood that the single-layer conductive layer 12 is not limited to the manner in which it is located on the same conductive layer as the uppermost conductive layer shown in fig. 2, and it may be located on the same conductive layer as any one of the conductive layers located at the lowermost layer or between the uppermost and lowermost layers.

When the quasi-yagi antenna elements 14 are specifically arranged, the number of the quasi-yagi antenna elements 14 may be specifically 2, 3, 4, or the like. As shown in fig. 2, the plurality of quasi-yagi antenna units 14 are arranged in an array, and specifically, the plurality of quasi-yagi antenna units 14 are arranged in a line on the single conductive layer 12, so as to form a planar quasi-yagi antenna array, thereby ensuring the radiation performance of the quasi-yagi antenna array. It should be understood that the array arrangement of the quasi-yagi antenna elements 14 is not limited to the in-line arrangement shown in fig. 2, and other arrangements capable of forming an array arrangement may be adopted.

As shown in fig. 2, each rf channel 13 of the rf board 10 corresponds to at least one quasi-yagi antenna element 14, and when specifically configured, each rf channel 13 is electrically connected to at least one quasi-yagi antenna element 14. Specifically, each rf channel 13 may electrically connect to at least one of the quasi-yagi antenna elements 14, specifically 1, 2, 3, and so on. As shown in fig. 2, each radio frequency channel 13 is electrically connected with 2 quasi-yagi antenna units 14, and in a specific setting, each radio frequency channel 13 is provided with a one-to-two power division network, which is respectively connected with the two corresponding quasi-yagi antenna units 14, so as to realize feeding of the two quasi-yagi antenna units 14, thereby improving the antenna gain of a single radio frequency channel 13 and compressing the beam width. Through the above arrangement, 8 rf channels 13 are arranged on each rf board 10, and each rf channel 13 corresponds to two quasi-yagi antenna units 14, so that a planar quasi-yagi antenna array formed by arranging 16 quasi-yagi antenna units 14 in an array is formed on each rf board 10. And 8 radio frequency boards 10 are stacked and arranged at intervals, so that a space quasi-yagi antenna array formed by arranging 128 quasi-yagi antenna units 14 in an array manner is formed, and a large-scale active array antenna is formed to have beam forming capability.

When each quasi-yagi antenna element 14 is specifically provided, as shown in fig. 4, the quasi-yagi antenna element 14 includes a balun structure 15 electrically connected to the corresponding radio frequency channel 13, an active array 16 electrically connected to the balun structure 15, and at least one passive array 17 located on one side of the active array 16 and facing away from the balun structure 15. The balun structure 15, the active element 16 and the passive element 17 are described in detail below.

The balun structure 15 shown in fig. 4 includes an impedance matching section 151 connected to the radio frequency path 13, and a phase shifter 152 connected to the impedance matching section 151. Specifically, the impedance matching section 151 is a quarter-wavelength impedance matching section at the operating frequency of the yagi antenna unit 14, specifically, as shown in fig. 3, the impedance matching section 151 is composed of two impedance matching sections 151, which are a first impedance matching section 1511 electrically connected to the radio frequency channel 13 and the phase shifter 152, and a second impedance matching section 1512 electrically connected to the active array 16 and the phase shifter 152. At a particular setting, the length l of the first impedance matching segment 1511₁Length l of second impedance matching section 1512₂The sum is approximately one quarter wavelength at the operating frequency of the quasi-yagi antenna element 14 to achieve adjustment of the antenna signal impedance. It should be understood that the above only illustrates one way of the impedance matching section 151, and that other ways may be employed in addition thereto. In particular, the phase shifter 152, shown in fig. 4, is specifically configured as a wideband 180 ° phase shifter to achieve phase alignment of the yagi antenna elements 14 And (6) adjusting. As shown in fig. 3, phase shifter 152 has an inner edge angle 1521 of 90 ° and an outer edge angle 1522 of 45 ° cut to ensure a more uniform propagation of electromagnetic energy and thus a broadband characteristic.

In particular arrangements of the active array 16, such as the active array 16 shown in fig. 4, which is in particular a dipole, comprising two sections electrically connected to the second impedance matching section 1512, the active array 16 comprises a first active array 161 and a second active array 162, which are symmetrically distributed, for convenience of the following description. In specific application, the feed source performs impedance conversion through the balun structure 15, and the power is divided into two paths of signals with equal amplitude and opposite phase for feeding the active array 16. Such as the passive array 17 shown in fig. 4, which is distributed on one side of the active array 16 and is spaced from the active array 16. In the specific setting, the length l of the passive array 17₃Is 0.15-0.25 wavelength under the working frequency of the quasi-yagi antenna unit 14, in particular, the length l of the passive array 17₃The wavelength may be any value between 0.15 and 0.25 wavelength, such as 0.15 wavelength, 0.18 wavelength, 0.19 wavelength, 0.20 wavelength, 0.21 wavelength, 0.22 wavelength, 0.25 wavelength, and the like, at the operating frequency of the quasi-yagi antenna unit 14. And the length of the active element 16 is greater than the length l of the passive element 17 ₃In particular, the length l of the first active array 161₄And the length l of the second active array 162₅The sum is larger than the length l of the passive array 17₃. And the spacing d between the active element 16 and the passive element 17₁Is 0.3-0.5 wavelength under the working frequency of the quasi-yagi antenna unit 14, specifically, the distance d between the active array 16 and the passive array 17₁The wavelength may be any value between 0.3 and 0.5 wavelength, such as 0.30 wavelength, 0.35 wavelength, 0.38 wavelength, 0.39 wavelength, 0.40 wavelength, 0.41 wavelength, 0.42 wavelength, 0.43 wavelength, 0.45 wavelength, 0.50 wavelength, etc., at the operating frequency of the yagi antenna unit 14. In the above scheme, the passive oscillator 17 generates an induced current under the action of the active oscillator 16 field, guides the radiation direction of electromagnetic energy, improves gain, and the passive oscillator 17 itself is also an input impedance matching unit to adjust the impedance of the antenna. It should be understood that the number of passive elements 17 is not limited to only 1 as shown in fig. 3, but rather is limited to only oneThere may be a plurality of 2, 3, 4, etc. When the number of the passive elements 17 is multiple, the passive elements 17 are arranged in sequence along the direction departing from the active element 16.

In addition, referring to fig. 5, a reflector 18 is disposed on the single-layer conductive layer 12 on the side opposite to the side on which the balun structure 15, the active element 16, and the passive element 17 are disposed (the back side of the single-layer conductive layer 12), and when the reflector 18 is specifically disposed, it is a metal plate disposed on the back side of the single-layer conductive layer 12, and forms a grounded metal surface to enhance the radiation performance of the quasi-yagi antenna unit 14.

By adopting the setting mode, the simulation and actual measurement S parameters of the quasi-yagi antenna unit 14 are shown in fig. 6 when the quasi-yagi antenna unit 14 is applied to a millimeter wave frequency band, the gain of the quasi-yagi antenna unit 14 is 5.5dBi, the working relative bandwidth exceeds 30%, and the requirements of the millimeter wave test frequency band in China are completely met.

Specifically, when at least two rf boards 10 are stacked and spaced apart from each other, as shown in fig. 1, the single-layer conductive layers 12 of the rf boards 10 are located on the same side, so that the multiple quasi-yagi antenna units 14 disposed on the single-layer conductive layers 12 are located on the same side, and a quasi-yagi antenna array composed of the multiple quasi-yagi antenna units 14 is formed. And the distance d between two adjacent radio frequency boards 10₂Specifically, the distance between two adjacent radio frequency boards 10 may be any value between 0.5 wavelength and 0.9 wavelength, such as 0.5 wavelength, 0.55 wavelength, 0.60 wavelength, 0.65 wavelength, 0.70 wavelength, 0.75 wavelength, 0.80 wavelength, 0.85 wavelength, 0.90 wavelength, and the like, at the operating frequency of the yagi antenna unit 14.

Because the millimeter wave wavelength is extremely short, the distance between the radio frequency boards 10 is narrow, in order to effectively control the distance between the radio frequency boards 10 and facilitate the assembly of the whole machine, an adjusting device for adjusting the distance between two adjacent radio frequency boards 10 is also arranged between two adjacent radio frequency boards 10. In specific setting, as shown in fig. 7, two adjacent radio frequency boards 10 in a plurality of stacked radio frequency boards 10 are firstly combined into one board card module 20, so that at least one board card module 20 respectively including two radio frequency boards 10 can be combined, and specifically, the number of the board card modules 20 that can be combined may be at least one of 1, 2, 3, and the like. When the number of the board card modules 20 is multiple, the board card modules 20 are stacked and arranged at intervals, and the distance between two adjacent radio frequency boards 10 is adjusted by adjusting the distance between two adjacent board card modules 20. For the following description, as shown in fig. 7, each board card module 20 includes a first rf board 101 and a second rf board 102 stacked together. When each board card module 20 is disposed, referring to fig. 7 and 8, first, the first rf board 101 is disposed on the first frame 21 including the first cavity, and then the second frame 22 including the second cavity is disposed on the first rf board 101, wherein the second frame 22 is provided with a through hole. The first frame 21, the first radio frequency board 101, and the second frame body 22 are then locked with screws in the reverse direction (set upward from the back surface of the first frame 21) through the through holes in the back surface of the first frame 21 (the surface located below the first frame 21 in the position of fig. 7). Then, the second rf board 102 is placed on the second frame 22, then the third frame 23 including the third cavity is placed on the second rf board 102, and the second frame 22, the second rf board 102 and the third frame 23 are fastened and fixed by screws from the front (the surface located above the third frame 23 in the position of fig. 7), so that the adjacent rf boards 10 form a board card module 20 through the first frame 21, the second frame 22 and the third frame 22. Afterwards, the two adjacent board card modules 20 are connected by using the wedge-shaped locking strip 24 in the prior art, specifically, the first wedge-shaped block 241 in the wedge-shaped locking strip 24 is fixedly connected with one board card module 20 in the two adjacent board card modules 20 in a screw fastening manner, the second wedge-shaped block 242 in the wedge-shaped locking strip 24 is fixedly connected with the other board card module 20 in the two adjacent board card modules 20 in a screw fastening manner, and when the screw 240 in the wedge-shaped locking strip 24 rotates, the phase error amplitude between the first wedge-shaped block 241 and the second wedge-shaped block 242 can be increased or decreased, so that the distance between the two adjacent board card modules 20 is adjusted, and the adjustment of the distance between the two adjacent radio frequency boards 10 is realized.

It should be understood that the above only shows one way of adjusting the device, and other ways of adjusting the distance between two adjacent rf boards 10 can be used. For example, the adjusting device includes a first housing fixedly connected to one of the two adjacent rf boards 10, and the other rf board 10 of the two adjacent rf boards 10 is fixed to a second housing by screw fastening, bonding, clamping, and the like. Mode such as screw fastening, joint and first casing fixed connection are passed through to first wedge 241 on the wedge locking strip 24, mode such as screw fastening, joint and second casing fixed connection are passed through to second wedge 242 on the wedge locking strip 24, be connected through screw rod 240 between first wedge 241 and the second wedge 242, and when rotating screw rod 240, can increase or reduce the phase error range between first wedge 241 and the second wedge 242, thereby adjust the interval between first casing and the second casing, in order to realize the adjustment of two adjacent radio frequency boards 10 interval.

In the above technical solution, at least one rf channel 13 and at least two quasi-yagi antenna units 14 electrically connected to the at least one rf channel 13 and arranged in an array are disposed on each of at least two stacked and spaced rf boards 10, so as to expand the operating bandwidth of the quasi-yagi antenna array. By adopting the arrangement mode, a stacking design mode is not required, so that the antenna and the radio frequency board 10 are convenient to integrate, and the size of the base station equipment is reduced. By integrating the plurality of quasi-yagi antenna units 14 arranged in an array on the rf board 10, the antenna gain and the receiving sensitivity of the quasi-yagi antenna array can be improved, and the rf cable and the antenna do not need to be connected by the rf connector, thereby reducing the transmission loss. The wideband characteristics of the quasi-yagi antenna element 14 are achieved by adding a balun structure 15 to the quasi-yagi antenna element 14 to achieve an unbalanced to balanced conversion.

In addition, an embodiment of the present invention further provides a millimeter wave base station device, and referring to fig. 9, the millimeter wave base station device includes any one of the quasi-yagi antenna arrays 60 described above.

In a specific setting, as shown in fig. 9, the millimeter wave base station apparatus includes a backplane 30 connected to the at least two radio frequency boards 10, and an intermediate frequency board 40 connected to the backplane 30, where the radio frequency board 10 is connected to the backplane 30, and the intermediate frequency board 40 is connected to the backplane 30, so as to implement connection between the intermediate frequency board 40 and the radio frequency board 10. As shown in fig. 9, the millimeter wave base station apparatus further includes a metal cover 50 wrapping the back plate 30, the intermediate frequency plate 40, and the quasi-yagi antenna array 60 and used for shielding, in specific arrangement, the metal cover 50 is a shell structure made of metal, and the back plate 30, the intermediate frequency plate 40, and the quasi-yagi antenna array 60 are disposed in the metal cover 50.

Fig. 9 shows a metal cover 50 on which a radiation window 51 for radiation of a quasi-yagi antenna array 60 is disposed. In particular, when the radiation window 51 is provided, as shown in fig. 9, the radiation window 51 is provided on the side of the metal cover 50 close to the quasi-yagi antenna unit 14, thereby facilitating radiation of the quasi-yagi antenna unit 14. A plate made of plastic, glass fiber reinforced plastic, or other material that does not affect the radiation of the antenna is disposed on the radiation window 51 to cover the radiation window 51, so as to protect the quasi-yagi antenna array 60 in the metal cover 50.

In the above technical solution, the bandwidth covered by the millimeter wave base station device during operation is expanded by using the quasi-yagi antenna array 60. By adopting the arrangement mode, a stacked design mode is not required, so that the antenna and the radio frequency board 10 are convenient to integrate, and the size of the millimeter wave base station equipment is reduced. By integrating a plurality of quasi-yagi antenna units 14 arranged in an array on the rf board 10, the antenna gain and the receiving sensitivity of the quasi-yagi antenna array 60 can be improved, and a rf connector is not required to connect the rf cable and the antenna, thereby reducing the transmission loss.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.