阅读说明：本技术 收发隔离电路、tdd无线收发电路和基站 (Transceiver insulation circuit, TDD wireless transceiver circuit and base station ) 是由 李洋洋 伍尚坤 于 2019-09-18 设计创作，主要内容包括：本发明涉及收发隔离电路、TDD无线收发电路和基站。其中的收发隔离电路包括第一微带线,用于传输信号发射单元输出的待发射信号；第二微带线,与第一微带线串联,用于将待发射信号传输至天线单元的公共端；第一PIN高速开关,第一端连接至第一微带线和第二微带线之间,第二端接地,使能控制端用于连接数字处理单元的使能输出端,用于根据使能电平控制第二微带线的接地状态；使能电平为数字处理单元根据TDD切换时隙输出的电平信号；第二PIN高速开关,第一端用于连接天线单元的公共端,第二端用于连接信号接收单元的输入端,使能控制端用于连接数字处理单元的使能输出端,用于根据使能电平控制信号接收单元的输入端的通断状态。提高了信号收发性能。(The present invention relates to transceiver insulation circuit, TDD wireless transceiver circuit and base stations.Transceiver insulation circuit therein includes the first microstrip line, is used for transmission the signal to be transmitted of signal transmitter unit output；Second microstrip line is connected with the first microstrip line, for signal to be transmitted to be transmitted to the common end of antenna element；First PIN high-speed switch, first end are connected between the first microstrip line and the second microstrip line, and second end ground connection, enabled control terminal is used to connect the enabled output end of digital processing element, for controlling the ground state of the second microstrip line according to enabled level；Enabled level is the level signal that digital processing element switches time slot output according to TDD；2nd PIN high-speed switch, first end is used to connect the common end of antenna element, second end is used for the input terminal of connection signal receiving unit, and enabled control terminal is used to connect the enabled output end of digital processing element, for the on off operating mode according to the input terminal for enabling level controling signal receiving unit.Improve signal transmitting and receiving performance.)

1. a kind of transceiver insulation circuit characterized by comprising

First microstrip line is used for transmission the signal to be transmitted of signal transmitter unit output；

Second microstrip line is connected with first microstrip line, for the signal to be transmitted to be transmitted to the public of antenna element End；

First PIN high-speed switch, first end are connected between first microstrip line and second microstrip line, the second termination Ground, enabled control terminal are used to connect the enabled output end of digital processing element, for micro- according to level control described second is enabled Ground state with line；The enabled level is the level signal that the digital processing element switches time slot output according to TDD；

2nd PIN high-speed switch, first end are used to connect the common end of the antenna element, and second end is received for connection signal The input terminal of unit, enabled control terminal are used to connect the enabled output end of the digital processing element, for according to described enabled Level controls the on off operating mode of the input terminal of the signal receiving unit.

2. transceiver insulation circuit according to claim 1, which is characterized in that the first PIN high-speed switch includes series connection The PIN diode D1 of reversal connection and the cathode of PIN diode D2, the PIN diode D1 and the PIN diode D2 are for connecting The enable signal end of the digital processing element, the plus earth of the PIN diode D1, the anode of the PIN diode D2 It is connected between first microstrip line and second microstrip line.

3. transceiver insulation circuit according to claim 1 or 2, which is characterized in that the 2nd PIN high-speed switch includes string Join the PIN diode D3 of reversal connection and the cathode of PIN diode D4, the PIN diode D3 and the PIN diode D4 for connecting The enable signal end of the digital processing element is connect, the anode of the PIN diode D3 connects the common end of the antenna element, The anode of the PIN diode D4 is used to connect the input terminal of the signal receiving unit.

4. a kind of TDD wireless transceiver circuit, which is characterized in that including signal transmitter unit, signal receiving unit, digital processing list Member and the described in any item transceiver insulation circuits of claims 1 to 3；

The enable signal end of the digital processing element is separately connected the signal transmitter unit, the signal receiving unit and institute The enabled control terminal of transceiver insulation circuit is stated, the signal input part of the signal transmitter unit connects the digital processing element Downlink output end, the signal output end of the signal receiving unit connect the uplink input end of the digital processing element；

The digital processing element, which is used to switch time slot according to TDD, receives list to the signal transmitter unit, the signal respectively The first and described transceiver insulation circuit output enables level, control respectively the signal transmitter unit, the signal receiving unit and The transceiver insulation circuit switches switch state with TDD switching time slot, carries out the transmitting-receiving process of signal.

5. TDD wireless transceiver circuit according to claim 4, which is characterized in that the signal transmitter unit includes digital-to-analogue Converter, the first low-pass filter, the first variable gain amplifier, modulator, the first phase locked source and power amplifier；

It is the digital analog converter, first low-pass filter, first variable gain amplifier, the modulator, described First phase locked source and the power amplifier are connected in series, and the input terminal of the digital analog converter connects the digital processing element Downlink output end；

The output end of the power amplifier connects the first microstrip line in the transceiver insulation circuit, the power amplifier Control terminal connects the enable signal end of the digital processing element, and the local oscillator input terminal of the modulator connects first locking phase The output end in source.

6. TDD wireless transceiver circuit according to claim 5, which is characterized in that the power amplifier include it is N number of, respectively The power amplifier is connected in series, and the control terminal of each power amplifier is separately connected making for the digital processing element It can signal end；The N is the positive integer more than or equal to 2.

7. TDD wireless transceiver circuit according to claim 4, which is characterized in that the signal receiving unit includes modulus Converter, the second low-pass filter, the second variable gain amplifier, frequency mixer, the second phase locked source and low-noise amplifier；

It is the analog-digital converter, second low-pass filter, second variable gain amplifier, the frequency mixer, described Second phase locked source and the low-noise amplifier are connected in series, and the output end of the analog-digital converter connects the digital processing list The uplink input end of member；

The input terminal of the low-noise amplifier connects the second microstrip line in the transceiver insulation circuit, the low noise amplification The control terminal of device connects the enable signal end of the digital processing element, the local oscillator input terminal connection described second of the frequency mixer The output end of phase locked source.

8. according to the described in any item TDD wireless transceiver circuits of claim 4 to 7, which is characterized in that it further include antenna element, The common end of the antenna element connects the second microstrip line in the transceiver insulation circuit.

9. TDD wireless transceiver circuit according to claim 8, which is characterized in that the antenna element includes bandpass filtering Device and antenna, second microstrip line are connected to the common end of the antenna by the bandpass filter.

10. a kind of base station, which is characterized in that including the described in any item TDD wireless transceiver circuits of claim 4 to 9.

Technical field

The present invention relates to fields of communication technology, more particularly to a kind of transceiver insulation circuit, TDD wireless transceiver circuit and base It stands.

Background technique

With the development of communication technology, fourth generation mobile communication technology popularization and application, the 5th third-generation mobile communication technology It has emerged and has gradually promoted.The signal modulation mode that different communication systems uses is not quite similar, from the duplex communication mould of use TDD (Time Division Duplexing, time division duplex) mode and FDD (Frequency Division can be divided into formula Duplexing, frequency division duplex) mode.In tdd mode, power amplifier used in base station not only need to export it is high-power, But also the function of damage low-noise reception circuit need to be avoided.

For the wireless receiving and transmit circuit of tdd mode, mainly using collection in traditional wireless receiving and transmit circuit The switch operating of transmission circuit is carried out at single-pole double-throw switch (SPDT), or is wirelessly received using passive ferrite toroidal device as TDD Power Generation Road is to meet the switching of operating mode.However, inventor's discovery is above-mentioned traditional wireless in realizing process of the present invention It receives and remains the poor problem of signal transmitting and receiving performance with transmit circuit.

Summary of the invention

Based on this, it is necessary to for the problems of above-mentioned traditional wireless receiving and transmit circuit, provide a kind of energy Enough significantly improve the transceiver insulation circuit of signal transmitting and receiving performance, a kind of TDD wireless transceiver circuit and a kind of base station.

To achieve the goals above, the embodiment of the present invention the following technical schemes are provided:

On the one hand, the embodiment of the present invention provides a kind of transceiver insulation circuit, comprising:

First microstrip line is used for transmission the signal to be transmitted of signal transmitter unit output；

Second microstrip line is connected with first microstrip line, for the signal to be transmitted to be transmitted to antenna element Common end；

First PIN high-speed switch, first end are connected between first microstrip line and second microstrip line, second end Ground connection, enabled control terminal are used to connect the enabled output end of digital processing element, enable level control described second for basis The ground state of microstrip line；The enabled level is the level signal that the digital processing element switches time slot output according to TDD；

2nd PIN high-speed switch, first end are used to connect the common end of the antenna element, and second end is used for connection signal The input terminal of receiving unit, enabled control terminal are used to connect the enabled output end of the digital processing element, for according to Enabled level controls the on off operating mode of the input terminal of the signal receiving unit.

The first PIN high-speed switch includes bis- pole PIN diode D1 and PIN of series connection reversal connection in one of the embodiments, The cathode of pipe D2, PIN diode D1 and PIN diode D2 are used to connect the enable signal end of digital processing element, PIN diode The plus earth of D1, the anode of PIN diode D2 are connected between the first microstrip line and the second microstrip line.

The 2nd PIN high-speed switch includes bis- pole PIN diode D3 and PIN of series connection reversal connection in one of the embodiments, The cathode of pipe D4, PIN diode D3 and PIN diode D4 are used to connect the enable signal end of digital processing element, PIN diode The common end of the anode connection antenna element of D3, the anode of PIN diode D4 are used for the input terminal of connection signal receiving unit.

On the other hand, it provides at a kind of TDD wireless transceiver circuit, including signal transmitter unit, signal receiving unit, number Manage unit and above-mentioned transceiver insulation circuit；

The enable signal end of digital processing element is separately connected signal transmitter unit, signal receiving unit and transceiver insulation electricity The enabled control terminal on road, the downlink output end of the signal input part connection digital processing element of signal transmitter unit, signal receive The uplink input end of the signal output end connection digital processing element of unit；

Digital processing element is used to switch time slot respectively to signal transmitter unit, signal receiving unit and transmitting-receiving according to TDD Isolation circuit exports enabled level, controls signal transmitter unit, signal receiving unit and transceiver insulation circuit respectively and switches with TDD Time slot switches switch state, carries out the transmitting-receiving process of signal.

In one of the embodiments, signal transmitter unit include digital analog converter, it is the first low-pass filter, first adjustable Gain amplifier, modulator, the first phase locked source and power amplifier；

Digital analog converter, the first low-pass filter, the first variable gain amplifier, modulator, the first phase locked source and power Amplifier is connected in series, the downlink output end of the input terminal connection digital processing element of digital analog converter；

The first microstrip line in the output end connection transceiver insulation circuit of power amplifier, the control terminal of power amplifier connect The enable signal end of digital processing element is connect, the local oscillator input terminal of modulator connects the output end of the first phase locked source.

Power amplifier includes N number of in one of the embodiments, and each power amplifier is connected in series, and each power is put The control terminal of big device is separately connected the enable signal end of digital processing element；N is the positive integer more than or equal to 2.

In one of the embodiments, signal receiving unit include analog-digital converter, it is the second low-pass filter, second adjustable Gain amplifier, frequency mixer, the second phase locked source and low-noise amplifier；

Analog-digital converter, the second low-pass filter, the second variable gain amplifier, frequency mixer, the second phase locked source and low noise Acoustic amplifier is connected in series, the uplink input end of the output end connection digital processing element of analog-digital converter；

The second microstrip line in the input terminal connection transceiver insulation circuit of low-noise amplifier, the control of low-noise amplifier The enable signal end of end connection digital processing element, the local oscillator input terminal of frequency mixer connect the output end of the second phase locked source.

It in one of the embodiments, further include antenna element, the common end of antenna element connects in transceiver insulation circuit The second microstrip line.

Antenna element includes bandpass filter and antenna in one of the embodiments, and the second microstrip line is filtered by band logical Wave device is connected to the common end of antenna.

Another aspect also provides a kind of base station, including above-mentioned TDD wireless transceiver circuit.

A technical solution in above-mentioned technical proposal is had the following advantages and beneficial effects:

Above-mentioned transceiver insulation circuit, TDD wireless transceiver circuit and base station, by being designed using microstrip line, PIN high-speed switch Transceiver insulation circuit, make can control in conjunction with digital processing element, so that transceiver insulation circuit can follow TDD to switch Time slot is precisely controlled the switching of transmission circuit, and provides sufficiently high transmission circuit isolation and Insertion Loss is minimum, meanwhile, it is capable to full Sufficient Linear Great Power output requires.Circuit design structure is simplified, small in size and cost is not high, be conducive to reduce applied by TDD without The volume of line transmission circuit has achieved the purpose that significantly improve signal transmitting and receiving performance.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of transceiver insulation circuit in one embodiment；

Fig. 2 is the structural schematic diagram of transceiver insulation circuit in another embodiment；

Fig. 3 is the first structure diagram of TDD wireless transceiver circuit in one embodiment；

Fig. 4 is the second structural schematic diagram of TDD wireless transceiver circuit in one embodiment；

Fig. 5 is the third structural schematic diagram of TDD wireless transceiver circuit in one embodiment；

Fig. 6 is the 4th structural schematic diagram of TDD wireless transceiver circuit in one embodiment；

Fig. 7 is the 5th structural schematic diagram of TDD wireless transceiver circuit in one embodiment.

Specific embodiment

It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not For limiting the application.

It should be noted that unless otherwise defined, all technical and scientific terms used herein and belong to this hair The normally understood meaning of bright those skilled in the art is identical.Term as used herein in the specification of the present invention It is intended merely to describe the purpose of specifically embodiment, it is not intended that in the limitation present invention.Term as used herein "and/or" Including any and all combinations of one or more related listed items.

In TDD-LTE system, using the duplex mode of time division duplex, reception and transmission channel are separated with the time. It receives and transmitting uses the different time-gap of same frequency carrier wave as the carrying of channel, time resource (namely connects in both direction Receive and transmitting) on distributed.In the system based on TDD, receiving channel and transmission channel during the work time, need into The switching of row operating mode, to meet the need of work that signal receives and emits.Moreover, signal is received in emission process, connect It receives and needs to meet certain performance requirement between channel and transmission channel, such as during transmission channel work, emit the function of signal Rate is larger, needs to avoid being leaked in receiving channel and damage the low-noise amplifier in receiving channel, it is therefore desirable to have one Fixed isolation.In addition, the performances such as link Insertion Loss of output power size, receiving channel and transmission channel that transmission channel is supported Index is also particularly important to signal transmitting and receiving.For the problem that performance present in traditional wireless receiving and transmit circuit is poor, The embodiment of the invention provides following technical schemes:

Referring to Fig. 1, in one embodiment, a kind of transceiver insulation circuit 100 is provided, including the first microstrip line 12, Second microstrip line 14, the first PIN high-speed switch 16 and the 2nd PIN high-speed switch 18.First microstrip line 12 is used for transmission signal hair Penetrate the signal to be transmitted of the output of unit 210.Second microstrip line 14 is connected with the first microstrip line 12.Second microstrip line 14 is for will be to Transmitting signal is transmitted to the common end of antenna element 230.The first end of first PIN high-speed switch 16 is connected to the first microstrip line 12 And second between microstrip line 14.The second end of first PIN high-speed switch 16 is grounded.First PIN high-speed switch 16 makes can control Hold the enabled output end for connecting digital processing element 250.First PIN high-speed switch 16 is used for according to enabling level control the The ground state of two microstrip lines 14.Enabled level is the level signal that digital processing element 250 switches time slot output according to TDD. The first end of 2nd PIN high-speed switch 18 is used to connect the common end of antenna element 230.The second of 2nd PIN high-speed switch 18 End is used for the input terminal of connection signal receiving unit 270, and the enabled control terminal of the 2nd PIN high-speed switch 18 is for connecting digital place Manage the enabled output end of unit 250.2nd PIN high-speed switch 18 is used for according to enabled level controling signal receiving unit 270 The on off operating mode of input terminal.

It is appreciated that the first microstrip line 12 and the second microstrip line 14 are the transmission of the signal to be transmitted in transmission channel Line.First microstrip line 12 and the second microstrip line 14 are quarter-wave microstrip line, real to meet required transmission characteristic Now between antenna element 230 impedance operator matching, thus effectively promotion signal emission effciency, and guarantee between transmission circuit High-isolation.First PIN high-speed switch 16 and the 2nd PIN high-speed switch 18 are the switch block that PIN diode is constituted.The One PIN high-speed switch 16 and the 2nd PIN high-speed switch 18 can be the identical switch block of structure, and it is different to be also possible to structure Switch block, for example, comprising PIN diode quantity and its different two kinds of PIN high-speed switches of circuit connecting relation, as long as It is capable of providing required signal path (i.e. transmission channel and receiving channel) and opens and closes function.

Digital processing element 250 is to be responsible for that the digital signal that uplink/downlink transmits is received and dispatched and handled in this field, And provide the circuit unit of the logic control function of receiving-transmitting chain, such as baseband processor or baseband SOC system.Signal hair Penetrating unit 210 is the place that signal conversion, modulation and other enhancing processing are carried out to the digital signal from digital processing element 250 Circuit is managed, for providing the transmitting transmission link before signal downlink wireless transmission.Antenna element 230 is that responsible radiofrequency signal is wireless Transmitting and received circuit unit, for what is transmitted after handling signal transmitter unit 210 by transceiver insulation circuit 100 Radiofrequency signal (namely signal to be transmitted) is wirelessly transmitted in the air, and for being output to reception after aerial reception radiofrequency signal Link.Signal receiving unit 270 is to be demodulated, enhanced and signal conversion processes to the radiofrequency signal that antenna element 230 exports Processing circuit, for provide signal uplink receive when radio frequency processing link.

It should be noted that dotted line shown in Fig. 1 connection indicate be that digital processing element 250 switches according to TDD when Gap generates the signal transmission signal that enabled level controls each unit respectively, and the enable signal end of digital processing element 250 can be One, it is also possible to multiple, the enable signal end of digital processing element 250 can directly or indirectly be electrically connected to the first PIN High-speed switch 16, the 2nd PIN high-speed switch 18, signal transmitter unit 210 and signal receiving unit 270.Wherein, enabled level can To be high level, it is also possible to low level, required enabled level determines when can specifically work according to each unit.TDD is cut It changes time slot to refer in tdd mode, pre-configured reiving/transmitting state switches time slot according to the actual application.

Specifically, the first PIN high-speed switch 16 and the 2nd PIN high-speed switch 18 are at number when circuit transmission signal It manages under the enabled level control that unit 250 exports, the first PIN high-speed switch 16 is disconnected by one end of the second microstrip line 14 of control Ground connection, to control transmission channel (namely 14 place link of signal transmitter unit 210, the first microstrip line 12 and the second microstrip line) It opens；2nd PIN high-speed switch 18 disconnects the connection between antenna element 230 and signal receiving unit 270, to control and receive Channel (namely 18 place link of signal receiving unit 270 and the 2nd PIN high-speed switch) is closed, and signal to be transmitted is emitted by signal Unit 210 exports, and enters antenna element 230 by transmission channel and carries out wireless transmission.Due on the transmission link of transmitting signal There is no semiconductor devices, the power that circuit can be born greatly improves and Insertion Loss is smaller.It is treated simultaneously by the 2nd PIN high-speed switch 18 Transmitting signal is isolated, and signal to be transmitted is prevented to enter receiving channel, so that the circuit devcie in receiving channel is protected, such as Low-noise amplifier.Wherein, the output of digital processing element 250 to the first PIN high-speed switch 16 enabled level, with output to the The enabled level of two PIN high-speed switches 18 can be level signal of the same race (such as be all high level or be all low level), Can be different level signal, (such as exporting to the first PIN high-speed switch 16 is high level, and the 2nd PIN high speed is given in output Switch 18 is low level), it can specifically be worked according to the first PIN high-speed switch 16 and the 2nd PIN high-speed switch 18 required Enabled level and the open and close control needs in affiliated channel are determined.

When circuit receives signal, the first PIN high-speed switch 16 and the 2nd PIN high-speed switch 18 are in digital processing element Under the enabled level control of 250 outputs, the first PIN high-speed switch 16 is grounded by one end of the second microstrip line 14 of control, thus Transmission channel is controlled to close；The connection between antenna element 230 and signal receiving unit 270 is connected in 2nd PIN high-speed switch 18 Link, to control and receive channel unlatching, the reception signal that antenna element 230 exports enters by the 2nd PIN high-speed switch 18 Receiving channel.The 2nd PIN high-speed switch 18 is directly over into receiving channel, so that signal receiving unit due to receiving signal Transmission link Insertion Loss where 270 input terminal is minimum.Meanwhile it being provided by the first PIN high-speed switch 16 and the second microstrip line 14 To the sufficiently high isolation for receiving signal, receiving signal cannot be introduced into transmission channel.

Above-mentioned transceiver insulation circuit 100, by utilizing the transceiver insulation circuit structure of microstrip line, the design of PIN high-speed switch, Make can control in conjunction with digital processing element 250, so that transceiver insulation circuit 100 can follow TDD to switch time slot, precisely Ground controls the switching of transmission circuit, and provides sufficiently high transmission circuit isolation, and Insertion Loss is minimum, can meet simultaneously linear High-power output requirement.Circuit design structure is simplified, small in size and cost is not high, is conducive to reduce applied TDD wireless receiving and dispatching The volume of circuit has achieved the purpose that significantly improve signal transmitting and receiving performance.

Referring to Fig. 2, in one embodiment, the first PIN high-speed switch 16 include series connection reversal connection PIN diode D1 and PIN diode D2.The cathode of PIN diode D1 and PIN diode D2 are used to connect the enable signal of digital processing element 250 End.The plus earth of PIN diode D1.The anode of PIN diode D2 be connected to the first microstrip line 12 and the second microstrip line 14 it Between.

It, specifically can be according to actually answering it is appreciated that the quantity for the PIN diode for including in the first PIN high-speed switch 16 Switch control rate and required isolation etc. needed for carry out flexible choice, as long as can be realized to transmission channel Open and close control, and provide needed for isolation.In addition, the quantity of the first PIN high-speed switch 16 can also spirit Selection living, can be with more than one；When selection accesses more than two first PIN high-speed switches 16, different high-speed switches exists It can be accessed in circuit by way of being connected in series and/or being connected in parallel in transmission channel, as long as can ensure logical to transmitting The open and close in road control.

Specifically, in the present embodiment, the first PIN high-speed switch 16 is constituted using two PIN diodes of series connection reversal connection, When circuit transmission signal, the enabled level (i.e. low level) of the output of digital processing element 250, it will so that PIN diode D1 It is turned off with PIN diode D2, unearthed between the first microstrip line 12 and the second microstrip line 14, signal transmitter unit 210 exports Signal to be transmitted be transmitted to the common end of antenna element 230 by two sections of microstrip lines；At this point, due to the chain for emitting signal Road does not have semiconductor devices, and the power that circuit can be born greatly improves and Insertion Loss is smaller.Meanwhile the 2nd PIN high-speed switch 18 Receiving channel is closed, signal to be transmitted hardly leaks into receiving channel, meets the guarantor of low-noise amplifier in receiving channel Shield requires.

When circuit receives signal, the enabled level (i.e. high level) of the output of digital processing element 250, it will so that PIN Diode D1 and PIN diode D2 are both turned on, so that the closing transmitting indirectly of the first microstrip line 12 and the second microstrip line 14 Channel.When the 2nd PIN high-speed switch 18 opens receiving channel and receives signal, since PIN diode D1 is grounded, PIN bis- Pole pipe D1 and PIN diode D2 can provide sufficiently high isolation with two sections of microstrip lines, so that receiving signal cannot be introduced into transmitting Channel, to realize being isolated between transmission channel and receiving channel.

Designed by the access of above-mentioned PIN diode D1 and PIN diode D2, can efficiently realize transmission channel with TDD switches the switch control of time slot, and provides sufficiently high isolation, and switch control performance is preferable.PIN diode cost is not Height, and can effectively simplify the structure of transceiver insulation circuit 100, so that the switching control efficiency of transmission circuit is obviously improved.

In one embodiment, as shown in Fig. 2, including the PIN that series connection is reversely connected about the 2nd above-mentioned PIN high-speed switch 18 Diode D3 and PIN diode D4.The cathode of PIN diode D3 and PIN diode D4 are for connecting digital processing element 250 Enable signal end.The common end of the anode connection antenna element 230 of PIN diode D3.The anode of PIN diode D4 is for connecting The input terminal of signal receiving unit 270.

It is appreciated that the quantity for the PIN diode for including in the 2nd PIN high-speed switch 18, it specifically can also be according to reality The switch control rate needed for and required isolation and Insertion Loss etc. carry out flexible choice, as long as can be realized pair The open and close of receiving channel control, and provide the performances such as required isolation and Insertion Loss.In addition, the 2nd PIN high speed The quantity of switch 18 can also be with flexible choice, can be with more than one；When selection accesses more than two 2nd PIN high-speed switches 18 When, different high-speed switches can be accessed in circuit in receiving channel by way of being connected in series and/or being connected in parallel, only Want to ensure the open and close control to receiving channel.

Specifically, in the present embodiment, same two PIN diodes using series connection reversal connection constitute the 2nd PIN high speed and open 18 are closed, when circuit transmission signal, the enabled level (being low level) of the output of digital processing element 250, it will so that PIN Diode D1 and PIN diode D2 and PIN diode D3 and PIN diode D4 are turned off, and signal transmitter unit 210 exports Signal to be transmitted be transmitted to the common end of antenna element 230 by two sections of microstrip lines；At this point, bis- pole PIN diode D3 and PIN Pipe D4 is turned off and closes receiving channel, and signal to be transmitted hardly leaks into receiving channel, meets low noise in receiving channel The protection requirement of acoustic amplifier.

When circuit receives signal, the enabled level (being high level) of the output of digital processing element 250, it will so that PIN diode D1 and PIN diode D2 are both turned on and close transmission channel, PIN diode D3 and PIN diode D4 be both turned on and Open receiving channel.When receiving channel opens and receives signal, PIN diode D1 and PIN diode D2, with two sections of microstrip lines It can provide sufficiently high isolation, so that receiving signal cannot be introduced into transmission channel, PIN diode can then be passed through by receiving signal D3 and PIN diode D4 enter receiving channel, to realize being isolated between transmission channel and receiving channel.

Designed by the access of above-mentioned PIN diode D3 and PIN diode D4, can efficiently realize receiving channel with TDD switches the switch control of time slot, and provides sufficiently high isolation, and switch control performance is preferable.PIN diode cost is not Height, and can effectively simplify the structure of transceiver insulation circuit 100.It is jointly complete with above-mentioned PIN diode D1 and PIN diode D2 At transmitting-receiving switching control be isolated, can further promote the signal transmitting and receiving performance of transmission circuit.

Referring to Fig. 3, in one embodiment, also providing a kind of TDD wireless transceiver circuit 200, including signal transmitting list Member 210, signal receiving unit 270, digital processing element 250 and above-mentioned transceiver insulation circuit 100.Digital processing element 250 Enable signal end be separately connected the enabled control of signal transmitter unit 210, signal receiving unit 270 and transceiver insulation circuit 100 End processed.The downlink output end of the signal input part connection digital processing element 250 of signal transmitter unit 210.Signal receiving unit The uplink input end of 270 signal output end connection digital processing element 250.Digital processing element 250 according to TDD for switching Time slot exports enabled level to signal transmitter unit 210, signal receiving unit 270 and transceiver insulation circuit 100 respectively, controls respectively Signal transmitter unit 210, signal receiving unit 270 and transceiver insulation circuit 100 processed switch switch state with TDD switching time slot, Carry out the transmitting-receiving process of signal.

It is appreciated that closing signal transmitter unit 210 in this present embodiment, signal receiving unit 270, digital processing element 250 and transceiver insulation circuit 100 explanation, specifically may refer to each specific embodiment of above-mentioned transceiver insulation circuit 100 In respective explanations explanation, it is not reinflated herein to repeat.Structure in other embodiments hereafter about transceiver insulation circuit 100 Partial explanation, can be similarly referring to the respective explanations explanation in each specific embodiment of above-mentioned transceiver insulation circuit 100.

Specifically, digital processing element 250 is switching time slot according to TDD, transceiver insulation circuit 100 is controlled to complete to receive and dispatch When circuit switching is with being isolated, it can also synchronize to control signal transmitter unit 210 and signal receiving unit 270 and export enabled level, TDD switching time slot is followed to open or close to control signal transmitter unit 210 and signal receiving unit 270, thus with transmitting-receiving Isolation circuit 100 jointly realize signal transmitting-receiving be isolated control.

When circuit transmission signal, digital processing element 250 is respectively supplied to signal transmitter unit 210, signal receives list Enabled level needed for member 270 and transceiver insulation circuit 100, so that the signal transmission passage of signal transmitter unit 210 is opened, letter The signal transmission passage of number receiving unit 270 is closed, and transceiver insulation circuit 100 opens transmission channel and simultaneously closes receiving channel.With This simultaneously, 250 output digit signals of digital processing element to signal transmitter unit 210.Signal transmitter unit 210 is by digital signal The radiofrequency signal that power needed for meeting wireless transmission is converted to after processing such as converted, modulated and enhanced, and via transmitting-receiving every From in circuit 100 the first microstrip line 12 and the second microstrip line 14 output give antenna side carry out wireless transmission.

When circuit receives signal, digital processing element 250 is respectively supplied to signal transmitter unit 210, signal receives list Enabled level needed for member 270 and transceiver insulation circuit 100, so that the signal transmission passage of signal transmitter unit 210 is closed, letter The signal transmission passage of number receiving unit 270 is opened, and transceiver insulation circuit 100 closes transmission channel and simultaneously opens receiving channel.It Line side output receives signal by the 18 entering signal receiving unit of the 2nd PIN high-speed switch in transceiver insulation circuit 100 270.The reception signals of 270 pairs of signal receiving unit inputs, which are enhanced, demodulated and converted etc., obtains corresponding digital signal, and The digital signal is exported and is handled to digital processing element 250.

By applying above-mentioned transceiver insulation circuit 100, the transceiver channel of signal is enabled to follow TDD switching time slot real Now precisely switching, and provide sufficiently high transmission circuit isolation and Insertion Loss is minimum, meanwhile, it is capable to meet Linear Great Power output It is required that.Circuit design structure is simplified, can effectively reduce the volume of TDD wireless transceiver circuit 200 and reduce cost, significantly improves The signal transmitting and receiving performance of TDD wireless transceiver circuit 200.

Referring to Fig. 4, in one embodiment, signal transmitter unit 210 includes digital analog converter 211, the first low pass filtered Wave device 212, the first variable gain amplifier 213, modulator 214, the first phase locked source 215 and power amplifier 216.Digital-to-analogue conversion Device 211, the first low-pass filter 212, the first variable gain amplifier 213, modulator 214, the first phase locked source 215 and power are put Big device 216 is connected in series.The downlink output end of the input terminal connection digital processing element 250 of digital analog converter 211.Power amplification The first microstrip line 12 in the output end connection transceiver insulation circuit 100 of device 216.The control terminal connection number of power amplifier 216 The enable signal end of word processing unit 250.The local oscillator input terminal of modulator 214 connects the output end of the first phase locked source 215.

It is appreciated that digital analog converter 211, the first low-pass filter 212, the first variable gain amplifier 213, modulator 214, the devices such as the first phase locked source 215 and power amplifier 216 may each be existing device in this field, the model of each device Quantity etc., can be respectively according to electrology characteristic (such as frequency, amplitude, phase and other spies for transmitting signal in practical application scene Property) it is selected.Wherein, modulator 214 can be frequency conversion device, such as frequency mixer, for realizing to the upper of transmission signal Frequency-conversion processing, signal frequency needed for transmission signal up-converting to antenna element 230 is carried out wireless transmission.

Digital analog converter 211, the first low-pass filter 212, the first variable gain amplifier 213, modulator 214 and first Phase locked source 215 can be and is respectively connected to circuit in the form of discrete component, also can integrate on same radio frequency processing chip, with The form of integrated chip accesses circuit, so as to be substantially reduced the volume of the part transmit circuit.Power amplifier 216 can be with It is a stage power amplifier 216, is also possible to multi-stage power amplifier 216, such as by final stage power amplifier and multi-stage pushing grade power amplifier The multi-stage power amplifier 216 of composition can be specifically determined, as long as can satisfy according to the power requirement of signal to be transmitted Power requirement of the antenna element 230 to signal to be transmitted.

Specifically, digital processing element 250 is respectively supplied to power amplification when switching to the time slot of circuit transmission signal Enabled level needed for device 216, signal receiving unit 270 and transceiver insulation circuit 100, and output digit signals are to digital-to-analogue conversion Device 211.After the digital signal received is converted to analog signal by digital analog converter 211, it is output to the first low-pass filter 212 Carry out low-pass filtering treatment.Filtered analog signal is input to the first variable gain amplifier by the first low-pass filter 212 213 carry out the processing of signal pre-amplification.Analog signal after pre-amplification enters modulator 214, in modulator 214 with the first locking phase The local oscillation signal that source 215 exports is mixed, so that the analog signal is up-converted to signal to be transmitted.Power amplifier 216 It is opened under the action of enabled level, in this way, signal to be transmitted carries out power amplification by power amplifier 216, is suitable for day Line unit 230 carries out efficient wireless transmission.The amplified signal to be transmitted of power amplifier 216 is through transceiver insulation circuit 100 In the first microstrip line 12 enter.Since the first PIN high-speed switch 16 in transceiver insulation circuit 100 is in the effect of enabled level Under, transmission channel is opened, signal to be transmitted can be transferred to antenna list by the first microstrip line 12 and the second microstrip line 14 Member 230.Simultaneously as the 2nd PIN high-speed switch 18 in transceiver insulation circuit 100 will connect under the action of enabled level It receives channel to close, signal to be transmitted is isolated by the 2nd PIN high-speed switch 18 without being leaked in receiving channel, so that receiving logical The circuit devcie in road is protected.

Switch to circuit receive signal time slot when, digital processing element 250 be respectively supplied to power amplifier 216, Enabled level needed for signal receiving unit 270 and transceiver insulation circuit 100, effect of the power amplifier 216 in enabled level Lower closing, is in close state together with transceiver insulation circuit 100.At this point, the reception signal that antenna side receives passes through transmitting-receiving The 18 entering signal receiving unit 270 of the 2nd PIN high-speed switch of isolation circuit 100 is handled.

By the circuit structure of above-mentioned signal transmitter unit 210, cooperate with transceiver insulation circuit 100, so as to Under the enabled level effect that digital processing element 250 provides, follows TDD switching time slot to carry out transmission circuit and switch and be isolated, it can It is high by property, small in size and at low cost, signal transmitting and receiving better performances.

In one embodiment, power amplifier 216 includes N number of, and each power amplifier 216 is connected in series, and each power The control terminal of amplifier 216 is separately connected the enable signal end of digital processing element 250；N is the positive integer more than or equal to 2.

It is appreciated that in the present embodiment, the quantity of power amplifier 216 can be two or more, each function Rate amplifier 216 accesses in transmitting chain road after cascading, and is made can control by digital processing element 250 respectively, thus more accurate Ground follows the switching control of TDD switching time slot progress transmission circuit.The particular number of power amplifier 216 can be according to pending Penetrate the design volume size etc. that signal carries out signal power size and TDD wireless transceiver circuit 200 required when wireless transmission It is determined, as long as the signal power that can satisfy signal to be transmitted needs the design volume etc. with TDD wireless transceiver circuit 200 Index.

By the flexible setting of the cascade quantity of above-mentioned power amplifier 216, it can effectively meet different communication applied field The demand of signal transmission power in scape, also can satisfy in different communication application scenarios for communication equipment (namely application it is upper State each network element of TDD wireless transceiver circuit 200) volume and cost needs, the applicability of TDD wireless transceiver circuit 200 obtain It is effectively promoted, and cost is controllable.

Referring to Fig. 5, in one embodiment, signal receiving unit 270 includes analog-digital converter 271, the second low pass filtered Wave device 272, the second variable gain amplifier 273, frequency mixer 274, the second phase locked source 275 and low-noise amplifier 276.Modulus turns Parallel operation 271, the second low-pass filter 272, the second variable gain amplifier 273, frequency mixer 274, the second phase locked source 275 and low noise Acoustic amplifier 276 is connected in series.The uplink input end of the output end connection digital processing element 250 of analog-digital converter 271.Low noise The second microstrip line 14 in the input terminal connection transceiver insulation circuit 100 of acoustic amplifier 276.The control of low-noise amplifier 276 The enable signal end of end connection digital processing element 250.The local oscillator input terminal of frequency mixer 274 connects the defeated of the second phase locked source 275 Outlet.

It is appreciated that analog-digital converter 271, the second low-pass filter 272, the second variable gain amplifier 273, frequency mixer 274, the devices such as the second phase locked source 275 and low-noise amplifier 276 may each be existing device in this field, the type of each device Number, specification and quantity etc., can be respectively according to electrology characteristic (such as frequency, amplitude, the phase of the transmission signal of practical application scene Position and other characteristics) it is selected.Wherein, frequency mixer 274 for realizing to transmission reception signal down-converted, with Signal frequency needed for the reception signal of transmission is downconverted to subsequent device processing.

Analog-digital converter 271, the second low-pass filter 272, the second variable gain amplifier 273, frequency mixer 274 and second Phase locked source 275 can be and is respectively connected to circuit in the form of discrete component, also can integrate on same radio frequency processing chip, with The form of integrated chip accesses circuit, so as to be substantially reduced the volume that the part receives circuit.

Specifically, digital processing element 250 is respectively supplied to power amplification when switching to the time slot of circuit reception signal Enabled level needed for device 216, low-noise amplifier 276 and transceiver insulation circuit 100, so that power amplifier 216 is in number The ShiShimonoseki that makes can control of processing unit 250 is closed, and the first PIN high-speed switch 16 of transceiver insulation circuit 100 controls the second micro-strip One end of line 14 is grounded, so that reception signal be isolated.At the same time, the 2nd PIN high-speed switch 18 control of transceiver insulation circuit 100 The common end of antenna element 230 processed is connected with the input terminal of low-noise amplifier 276, and low-noise amplifier 276 is in digital processing Unit 250 makes can control lower unlatching work.Antenna element 230 export reception signal by the 2nd PIN high-speed switch 18 into Enter low-noise amplifier 276.

After the reception signal of 276 pairs of low-noise amplifier inputs amplifies processing, export to frequency mixer 274.It is being mixed It receives signal in device 274 to be mixed with the local oscillation signal that the second phase locked source 275 exports, to downconvert to the signal frequency of setting Rate (specific size of the signal frequency of setting can be selected according to the processing of following link).Reception after down coversion After signal enters the progress power amplification of the second variable gain amplifier 273, low-pass filtering is carried out by the second low-pass filter 272 Processing.Reception signal after low-pass filtering treatment finally after analog-digital converter 271 is converted into corresponding digital signal, exports It is handled to digital processing element 250.

When switching to the time slot of circuit transmission signal, digital processing element 250 be respectively supplied to power amplifier 216, Enabled level needed for low-noise amplifier 276 and transceiver insulation circuit 100, so that power amplifier 216 is in digital processing list Member 250 makes can control lower unlatching, and the first PIN high-speed switch 16 of transceiver insulation circuit 100 controls the second microstrip line 14 One end disconnects ground connection, so that signal to be transmitted can be transferred out by two sections of microstrip lines.At the same time, low noise amplification 2nd PIN high-speed switch 18 of device 276 and transceiver insulation circuit 100 closes in the ShiShimonoseki that makes can control of digital processing element 250, makes Signal must be emitted to be isolated and receiving channel can not be entered by the 2nd PIN high-speed switch 18.

By the circuit structure of above-mentioned signal receiving unit 270, cooperate with transceiver insulation circuit 100, so as to Under the enabled level effect that digital processing element 250 provides, follows TDD switching time slot to carry out transmission circuit and switch and be isolated, it can It is high by property, small in size and at low cost, signal transmitting and receiving better performances.

Referring to Fig. 6, in one embodiment, above-mentioned TDD wireless transceiver circuit 200 further includes antenna element 230.It The second microstrip line 14 in the common end connection transceiver insulation circuit 100 of line unit 230.

It is appreciated that antenna element 230 is the circuit unit for being responsible for radiofrequency signal wireless transmission and receiving, it is used for signal The radiofrequency signal (namely signal to be transmitted) transmitted after the processing of transmitting unit 210 by transceiver insulation circuit 100 is wirelessly sent out It is mapped in the air, and for being output to receives link after aerial reception radiofrequency signal.Antenna element 230 may include antenna with And the structure divisions such as filter, it can also include other supplementary structures, such as devices such as amplifier and select switch specifically can be with It is selected according to the actual application.

Specifically, when TDD wireless transceiver circuit 200 follow TDD switching time slot switch to signal transmission time slot when, transmitting-receiving every The signal to be transmitted exported from circuit 100 is transferred on antenna element 230, the signal to be transmitted inputted by 230 Duis of antenna element Carry out wireless transmission.When TDD wireless transceiver circuit 200, which follows TDD switching time slot to switch to signal, receives time slot, antenna element 230 will pass through 100 entering signal receiving unit of transceiver insulation circuit as signal is received from the radiofrequency signal received in the air 270 are handled.It is single by above-mentioned antenna element 230 and transceiver insulation circuit 100, digital processing element 250, signal transmitting The Combination Design of member 210 and signal receiving unit 270, can effectively reduce the volume of TDD wireless transceiver circuit 200, be also convenient for Integrated design is carried out, product applicability is promoted.

Referring to Fig. 7, in one embodiment, antenna element 230 includes bandpass filter 231 and antenna 232, and second is micro- The common end of antenna 232 is connected to by bandpass filter 231 with line 14.

It is appreciated that in the present embodiment, antenna element 230 is made of bandpass filter 231 and antenna 232.Wherein, band The passband of bandpass filter 231 can be according to the frequency of the useful signal (such as above-mentioned signal to be transmitted and reception signal) of required transmission Rate is selected, if it can reliably filter out the interference component other than signal to be transmitted, and received from antenna 232 Required reception signal is selected in radiofrequency signal.

Above-mentioned antenna 232 can be antenna 232 all types of in this field, the characterisitic parameter of antenna 232, structure size With shape etc., it is not construed as limiting, can be specifically determined according to actual communications applications scene in the present specification.By above-mentioned Bandpass filter 231 and antenna 232 constitute antenna element 230, can be in order to single with transceiver insulation circuit 100, signal transmitting Member 210 and the high performance signal transmitting and receiving processing of 270 cooperative achievement of signal receiving unit.

In one embodiment, a kind of base station is also provided, including above-mentioned TDD wireless transceiver circuit 200.

It is appreciated that specific structure and its explanation of TDD wireless transceiver circuit 200 in this present embodiment are closed, it can With referring to the explanation in the various embodiments described above about TDD wireless transceiver circuit 200, herein it is not reinflated repeat it is detailed It states.Base station can be all types of base station equipments in this field in TDD-LTE system.

Using the base station of above-mentioned TDD wireless transceiver circuit 200, due to TDD wireless transceiver circuit 200 and transceiver insulation electricity The structure on road 100 designs, and high performance signal transmitting and receiving may be implemented and handle the equipment volume meanwhile, it is capable to effectively diminution base station, Equipment installation space is saved, is conducive to reduce equipment power dissipation, promotes telecommunication service quality.

Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance Shield all should be considered as described in this specification.Only several embodiments of the present invention are expressed for above embodiments, retouches State more specific and detailed, but it cannot be understood as the limitations to patent of invention range.It should be pointed out that for this For the those of ordinary skill in field, without departing from the inventive concept of the premise, various modifications and improvements can be made, this Belong to protection scope of the present invention.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.