CN107146956B - Antenna element and MIMO antenna system using codebook - Google Patents
Antenna element and MIMO antenna system using codebook Download PDFInfo
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- CN107146956B CN107146956B CN201610114175.4A CN201610114175A CN107146956B CN 107146956 B CN107146956 B CN 107146956B CN 201610114175 A CN201610114175 A CN 201610114175A CN 107146956 B CN107146956 B CN 107146956B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
- H01Q21/293—Combinations of different interacting antenna units for giving a desired directional characteristic one unit or more being an array of identical aerial elements
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- Variable-Direction Aerials And Aerial Arrays (AREA)
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- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
A kind of MIMO antenna system using codebook includes first antenna unit and the second antenna element.The first antenna unit includes the first transmitter, the first receiver, first annular device, the first compensation circuit, the second compensation circuit, first antenna and the first electronic switch；Second antenna element includes the second transmitter, the second receiver, the second circulator, third compensation circuit, the 4th compensation circuit, the second antenna and the second electronic switch；Described first and third compensation circuit be used to be reduced for leakage signal；Described second and the 4th compensation circuit be used to be reduced for near-field interference signal.The MIMO antenna system using codebook can realize noise and effectively reduce.
Description
Technical field
The present invention relates to wireless communication field more particularly to a kind of antenna elements, further relate to a kind of application antenna element
MIMO antenna system using codebook.
Background technique
The receive-transmit systems such as continuous wave radar, RFID carry out AF panel usually using single antenna, can there is several lack in this way
Point, such as receives that circuit loss is larger, and noise figure is high, and coupler causes emission effciency low with combining for combiner, need using
The phase shifter and attenuator of high-res cause cost increase etc..
Existing some double antenna technologies can be effectively improved the above problem, however there is still a need in face of closely hindering for double antenna
Object is hindered to interfere this problem.The reflection echo of short distance barrier about 30dB lower than transmitted wave is higher than reflecting signal at a distance
20dB or more.The above problem will lead to snr of received signal reduction, that is, reduces the receiving sensitivity of receiver, shorten communication
Range reduces the communication range of useful signal, and there may be intermodulation signals to increase interference and power consumption.
Summary of the invention
In consideration of it, the antenna element and multiple antennas can be inhibited mutually to be concerned with that signal reduces may be implemented it is necessary to provide a kind of
The MIMO antenna system using codebook disturbed.
A kind of antenna element, including transmitter, receiver, circulator, controller and antenna, the antenna element also wrap
It includes:
First coupler, the first end of first coupler connect the transmitter by the first amplifier, and described the
The second end of one coupler connects the first end of the circulator, and the second end of the circulator connects the antenna；
Second coupler, the first end of second coupler connect the third end of the circulator, second coupling
The second end of device connects the receiver；
First compensation circuit, the input terminal of first compensation circuit connects the second end of the third coupler, described
The output end of first compensation circuit connects the 4th end of second coupler；
The first end of first electronic switch, first electronic switch connects the transmitter, first electronic switch
Second end be connected to the third end of first coupler, the third end of first electronic switch is connected to described first and mends
Repay the input terminal of circuit；
When the third end of first electronic switch connects the first end of first electronic switch, the antenna element
For correction mode, the transmitter emits the first signal to first compensation circuit, the transmitter emit the first signal according to
Secondary first end and second end through the circulator is transmitted to the antenna, and first compensation circuit handles first signal
Output first reduces signal to second coupler afterwards, and the first end of second coupler receives circulator third end
The second signal of transmission, second coupler reduce described first after signal is coupled with the second signal and export a third
Signal is to the receiver.
Preferably, first compensation circuit includes a phase-shift circuit and an attenuator circuit.
Preferably, the phase-shift circuit includes several power dividers and the second electronic switch, second electronic cutting
Close the phase change for being used for adjustment signal.
Preferably, the attenuator circuit includes the attenuator of several parallel connections.
A kind of MIMO antenna system using codebook, comprising:
First antenna unit, the first antenna unit include the first transmitter, the first receiver, first annular device, the
One compensation circuit, the second compensation circuit, first antenna and the first electronic switch；
Second antenna element, second antenna element include the second transmitter, the second receiver, the second circulator, the
Three compensation circuits, the 4th compensation circuit, the second antenna and the second electronic switch；
The signal that wherein first and second described compensation circuit is used to receive for first receiver is reduced,
The signal that the third and the 4th compensation circuit are used to receive for second receiver is reduced；First compensation
Circuit is used to be reduced for the leakage signal of the first annular device；Second compensation circuit is used to be directed to described first
The near-field interference signal of received second antenna element of antenna is reduced；The third compensation circuit is used for for described
The leakage signal of second circulator is reduced；4th compensation circuit is used to do for the near field of the first antenna unit
Signal is disturbed to be reduced.
Preferably, the first antenna unit includes first to third coupler, and the first end of first coupler is logical
It crosses the first amplifier and connects first transmitter, the second end of first coupler connects the first of the first annular device
The second end at end, the first annular device connects the first antenna；The first end connection described first of second coupler
The second end at the third end of circulator, second coupler connects first receiver；First compensation circuit it is defeated
Enter the second end that end connects the third coupler, the output end of first compensation circuit connects the of second coupler
Four ends, the third end of the third coupler are connected to the input terminal of the 4th compensation circuit；First electronic switch
First end connects first transmitter, and the second end of first electronic switch is connected to the third of first coupler
End, the third end of first electronic switch is connected to the input terminal of first compensation circuit.
Preferably, second antenna element includes the 4th to the 6th coupler, and the first end of the 4th coupler is logical
It crosses the second amplifier and connects second transmitter, the second end of the 4th coupler connects the first of second circulator
The second end at end, second circulator connects second antenna；The first end connection described second of 5th coupler
The second end at the third end of circulator, the 5th coupler connects second receiver；The third compensation circuit it is defeated
Enter the second end that end connects the 6th coupler, the output end of the third compensation circuit connects the of the 5th coupler
The third end at four ends, the 6th coupler connects the input terminal of second compensation circuit；The of second electronic switch
One end connects second transmitter, and the second end of second electronic switch is connected to the third end of the 4th coupler,
The third end of second electronic switch is connected to the input terminal of second compensation circuit.
Preferably, the MIMO antenna system using codebook further includes a system controller, and the system controller is separately connected
First transmitter, the second transmitter, the first receiver, the second receiver, first to fourth compensation circuit, the system control
Device processed adjusts first to fourth compensation circuit by detecting the signal-to-noise ratio of first and second receiver reception signal.
Preferably, the output signal of first and second compensation circuit is exported to a power combiner device, and the power closes
Road device output first reduces signal to second coupler, and second coupler reduces signal and described for described first
A third signal is exported to first receiver after the second signal coupling of one circulator output.
Preferably, first to fourth compensation circuit includes the attenuator of several parallel connections.
By this design of electronic switch selection mode and efficient compensation circuit, mimo antennas system of the present invention
System may be implemented to reduce leakage signal and the effective of near-field interference signal.
Detailed description of the invention
Fig. 1 is the circuit diagram of inventive antenna unit and MIMO antenna system using codebook better embodiment.
Fig. 2 is the circuit diagram of another better embodiment of compensation circuit in Fig. 1.
Main element symbol description
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
Referring to FIG. 1, MIMO antenna system using codebook 1000 of the present invention includes first antenna unit 100, the second antenna element
200 and system controller 300.
The first antenna unit 100 includes the first transmitter 11, the first amplifier 21, the second amplifier 22, the first coupling
Clutch 31, the second coupler 32, third coupler 33, first annular device 41, the first electronic switch 51, first antenna 61, first
Compensation circuit 71, the second compensation circuit 72, the first noise suppression circuit 81, the first receiver 91, the first power combiner device 101,
Resistance R1, resistance R2 and resistance R3.
The first end 1 of first transmitter 11 connects the first input end 1 of first amplifier 21.First hair
The first end 1 for penetrating machine 11 is also connected with the first end 1 of first electronic switch 51.The second end 2 of first transmitter 11 connects
Connect the first end 1 of the system controller 300.The second end 2 of first transmitter 11 is also connected with first amplifier 21
The second input terminal 2.The output end 3 of first amplifier 21 connects the first end 1 of first coupler 31.Described first
The second end 2 of coupler 31 connects the first end 1 of the first annular device 41.The second end 2 of the first annular device 41 connects
The first antenna 61.The third end 3 of the first annular device 41 connects the first end 1 of second coupler 32.Described
The second end 2 of two couplers 32 connects first noise suppression circuit 81.
First noise suppression circuit 81 includes the first low noise amplifier 811, the first attenuator 812 and the first frequency demultiplier
813.The second end 2 of second coupler 32 connects the first end 1 of first low noise amplifier 811.First low noise
The second end 2 of amplifier 811 connects the input terminal 1 of first attenuator 812.The output end 2 of first attenuator 812 connects
Connect the first end 1 of first frequency demultiplier 813.The second end 2 of first frequency demultiplier 813 connects first receiver 91
First end 1.The second end 2 of first receiver 91 connects the second end 2 of the system controller 300.
The third end 3 of first coupler 31 connects the second end 2 of first electronic switch 51.First coupling
4th end 4 of device 31 is grounded by the resistance R1.
The third end 3 of second coupler 32 is grounded by resistance R2.4th end 4 of second coupler 32 connects
In the output end 2 of second amplifier 22.The input terminal 1 of second amplifier 22 is connected to the first power combiner device
101 output end 3.The first input end 1 of the first power combiner device 101 is connected to first compensation circuit 71.It is described
Second input terminal 2 of the first power combiner device 101 is connected to second compensation circuit 72.
First compensation circuit 71 include the first phase shifter 711, the first power divider 712, the second attenuator 713,
Third attenuator 714, the second power combiner device 715 and one first digital analog converter 716.The first power combiner device 101
First input end 1 is connected to the output end 3 of the second power combiner device 715.The input terminal 1 of first phase shifter 711 connects
It is connected to the second end 2 of the third coupler 33.The output end 3 of first phase shifter 711 is connected to first power point
The input terminal 1 of orchestration 712.First output end 2 of first power divider 712 is connected to second attenuator 713
Input terminal 1.The second output terminal 3 of first power divider 712 is connected to the input terminal 1 of the third attenuator 714.Institute
The output end 2 for stating the second attenuator 713 is connected to the first input end 1 of the second power combiner device 715.The third decaying
The output end 2 of device 714 is connected to the second input terminal 2 of the second power combiner device 715.First digital analog converter 716
Input terminal 1 be connected to the third end 3 of the system controller 300.The output end 2 of first digital analog converter 716 connects
In the input terminal 2 of first phase shifter 711.
Second compensation circuit 72 include the second phase shifter 721, the second power divider 722, the 4th attenuator 723,
5th attenuator 724 and third power combiner device 725.The output end 2 of second phase shifter 721 is connected to second power
The input terminal 1 of distributor 722.The output end 2 of second power divider 722 connects the input of the 4th attenuator 723
End 1.The output end 3 of second power divider 722 connects the input terminal 1 of the 5th attenuator 724.4th decaying
The output end 2 of device 723 is connected to the input terminal 1 of the third power combiner device 725.The output end 2 of 5th attenuator 724
It is connected to the input terminal 2 of the third power combiner device 725.The output end 3 of the third power combiner device 725 is connected to described
The input terminal 2 of first power combiner device 101.
The first end 1 of the third coupler 33 is connected to the third end 3 of first electronic switch 51.The third coupling
4th end 4 of clutch 33 is grounded by the resistance R3.
The third end 3 of the system controller 300 is connected to second compensation circuit 72.
First transmitter 11 is for emitting signal.First amplifier 21 is for amplifying transmitting signal.Described
One receiver 91 is for obtaining the reception signal after AF panel.First low noise amplifier 811 receives letter for amplifying
Number.The first annular device 41 is the transmitting-receiving letter that three ports circulator clockwise is used to be isolated in the first antenna unit 100
Number.First coupler 31, the second coupler 32 are connect with the different port of the first annular device 41 so that first annular device 41
Input, output-resistor matching.
The present invention is directed to reduce by two kinds of interference signals: the first interference signal is leakage signal, leakage signal from transmitter,
Circulator reaches the second coupler, and then interferes receiver；Second of interference signal is near-field interference signal, near-field interference signal
It is reflected by neighbouring barrier after aerial radiation for the transmitting signal of transmitter and enters circulator, and then interfere receiver.
First compensation circuit 71 is for reducing the leakage signal.
Second compensation circuit 72 is for reducing inter-antenna interference signal.
Second antenna element 200 includes the second transmitter 12, third amplifier 23, the 4th amplifier 24, the 4th coupling
Clutch 34, the 5th coupler 35, the 6th coupler 36, the second circulator 42, the second electronic switch 52, the second antenna 62, third
Compensation circuit 73, the 4th compensation circuit 74, the second noise suppression circuit 82, the second receiver 92, the 4th power combiner device 102,
Resistance R4, resistance R5 and resistance R6.
The first end 1 of second transmitter 12 connects the first input end 1 of the third amplifier 23.Second hair
The first end 1 for penetrating machine 12 is also connected with the first end 1 of second electronic switch 52.The second end 2 of second transmitter 12 connects
Connect the 4th end 4 of the system controller 300.Second input terminal 2 of second amplifier 22 is also attached to the system control
5th end 5 of device 300 processed.The output end 3 of second amplifier 22 connects the first end 1 of the 4th coupler 34.It is described
The second end 2 of 4th coupler 34 connects the first end 1 of second circulator 42.The second end 2 of second circulator 42
Connect second antenna 62.The third end 3 of second circulator 42 connects the first end 1 of the 5th coupler 35.Institute
The second end 2 for stating the 5th coupler 35 connects second noise suppression circuit 82.
Second noise suppression circuit 82 includes the second low noise amplifier 821, the 6th attenuator 822 and the second frequency demultiplier
823.The second end 2 of 5th coupler 35 connects the first end 1 of second low noise amplifier 821.Second low noise
The second end 2 of amplifier 821 connects the first end 1 of the 6th attenuator 822.The second of second low noise amplifier 821
The input terminal 1 of 2 connection the 6th attenuator 822 of end.The output end 2 of 6th attenuator 822 connects second frequency reducing
The first end 1 of device 823.The second end 2 of second frequency demultiplier 823 connects the first end 1 of second receiver 92.Described
The second end 2 of two receivers 92 connects the 5th end 5 of the system controller 300.
The third end 3 of 4th coupler 34 connects the second end 2 of second electronic switch 52.4th coupling
4th end 4 of device 34 is grounded by resistance R4.
The third end of 5th coupler 35 is grounded by resistance R5.4th end 4 of the 5th coupler 35 connects
In the output end 2 of the 4th amplifier 24.The input terminal 1 of 4th amplifier 24 is connected to the 4th power combiner device
102 output end 3.The first input end 1 of the 4th power combiner device 102 is connected to the third compensation circuit 73.It is described
Second input terminal 2 of the 4th power combiner device 102 is connected to the 4th compensation circuit 74.
The third compensation circuit 73 include third phase shifter 731, third power divider 732, the 7th attenuator 733,
8th attenuator 734, the 5th power combiner device 735 and the second digital analog converter 736.The of the 4th power combiner device 102
One input terminal 1 is connected to the output end 3 of the 5th power combiner device 735.The input terminal 1 of the third phase shifter 731 connects
In the second end 2 of the 6th coupler 36.The output end 3 of the third phase shifter 731 is connected to the third power distribution
The input terminal 1 of device 732.First output end 2 of the third power divider 732 is connected to the defeated of the 7th attenuator 733
Enter end 1.The second output terminal 3 of the third power divider 732 is connected to the input terminal 1 of the 8th attenuator 734.It is described
The output end 2 of 7th attenuator 733 is connected to the first input end 1 of the 5th power combiner device 735.8th attenuator
734 output end 2 is connected to the second input terminal 2 of the 5th power combiner device 735.Second digital analog converter 736
Input terminal 1 is connected to the 5th end 5 of the system controller 300.The output end 2 of second digital analog converter 736 is connected to
The input terminal 2 of the third phase shifter 731.The third end 3 of 6th coupler 36 is connected to second phase shifter 721
Input terminal 1.4th end 4 of the 6th coupler 36 is grounded by the resistance R6.
4th compensation circuit 74 include the 4th phase shifter 741, the 4th power divider 742, the 9th attenuator 743,
Tenth attenuator 744 and the 6th power combiner device 745.The output end 2 of 4th phase shifter 741 is connected to the 4th power
The input terminal 1 of distributor 742.The input terminal 1 of 4th phase shifter 741 is connected to the third end 3 of the third coupler 33.
The output end 2 of 4th power divider 742 is connected to the input terminal 1 of the 9th attenuator 743.9th attenuator
743 output end 2 is connected to the input terminal 1 of the 6th power combiner device 745.The output of 4th power divider 742
End 3 is connected to the input terminal 1 of the tenth attenuator 744.The output end 2 of tenth attenuator 744 is connected to the described 6th
The input terminal 2 of power combiner device 745.The output end 3 of the 6th power combiner device 745 is connected to the 4th amplifier 24
Input terminal 1.
5th end 5 of the system controller 300 is separately connected the third compensation circuit 73 and the 4th compensation circuit 74.
Similarly, second transmitter 12 is for emitting signal.The third amplifier 23 is for amplifying transmitting signal.
Second receiver 92 is for obtaining the reception signal after AF panel.Second low noise amplifier 821 is for amplifying
Receive signal.Second circulator 42 is the transmitting-receiving letter that three port circulators are used to be isolated in second antenna element 200
Number.4th coupler 34, the 5th coupler 35 are connect with the different port of second circulator 42 so that the second circulator 42
Input, output-resistor matching.
The third compensation circuit 73 is for reducing the leakage signal.
4th compensation circuit 74 is for reducing inter-antenna interference signal.
When the third end 3 of first electronic switch 51 connects the first end 1 of first electronic switch 51, described first
Antenna element 100 is in first mode.
When the third end 3 of first electronic switch 51 connects the second end 2 of first electronic switch 51, described first
Antenna element 100 is in second mode.
When the third end 3 of second electronic switch 52 connects the first end 1 of second electronic switch 52, described second
Antenna element 200 is in first mode.
When the third end 3 of second electronic switch 52 connects the second end 2 of second electronic switch 52, described second
Antenna element 200 is in second mode.
The first mode is signal correction mode.The second mode is signal compensation mode.
By taking the first antenna unit 100 as an example, when the first antenna unit 100 is in first mode, that is, correction mode
When, the first signal that first transmitter 11 exports is successively defeated through first electronic switch 51 and the third coupler 33
Out to first compensation circuit 71.First signal is also through first amplifier 21 amplification and first coupler 31
After be transmitted to the first annular device 41, then be transmitted to the first antenna 61 via the first annular device 41.Described first
Circulator 41 generates a leakage signal.First signal is exported after first compensation circuit 71 compensates to described
One power combiner device 101.Second compensation circuit 72 to the output of the 6th coupler 36 of second antenna element 200 the
Binary signal compensates.The second signal is exported to first power after second compensation circuit 72 compensates and is closed
Road device 101.Signal is synthesized first and reduces signal and by second amplifier 22 general by the first power combiner device 101
Described first, which reduces signal, exports to the second coupler 32.Second coupler 32 is from the third end of the first annular device 41
3 receive a third signal.Second coupler 32 by the third signal and described first reduce signal coupling after export to
First receiver 91.
The system controller 300 is for monitoring transmitter, receiver and compensation circuit working condition.The system control
Device 300 is also used to control the compensation circuit and carries out signal compensation with a presupposed solution.The signal compensation includes signal phase
Change, change in signal strength etc..The system controller 300 receives letter for detecting first receiver 91 received first
Number, and the presupposed solution is adjusted according to the signal-to-noise ratio in the first reception signal.
When the first antenna unit 100 is switched to compensation model, the first antenna unit is according to correction mode pair
Signal is compensated to realize and reduce to leakage signal and near-field interference signal.
The working principle of second antenna element 200 is similar with the first antenna unit 100, and details are not described herein.
Second amplifier 22 is a variable operational amplifier.4th amplifier 24 is a variable operation amplifier
Device.
In other embodiments, the MIMO antenna system using codebook 1000 can also include more antennas unit, such as 4 days
Line unit.
In first compensation circuit 71, the second compensation circuit 72, third compensation circuit 73 and the 4th compensation circuit 74,
Phase shift and decaying sequence can change, without influencing signal compensation.
Referring to FIG. 2, Fig. 2 discloses another better embodiment of compensation circuit.The compensation circuit 400 includes moving
Circuitry phase 500 and attenuator circuit 600.The phase-shift circuit 500 includes the 5th power divider 401, the 6th power divider
402, the 7th power divider 403 and third electronic switch 53.The attenuator circuit 600 includes the 8th power divider 404, the
Nine power dividers 405, the tenth power divider 406, the 11st attenuator 407, the decaying of the 12nd attenuator the 408, the 13rd
Device 409 and the 14th attenuator 410, the 7th power combiner device 411, the 8th power combiner device 412 and the 9th power combiner device
413。
The input terminal 1 of 5th power divider 401 is for receiving external signal.5th power divider 401
The first output end 2 connect the input terminal 1 of the 6th power divider 402.The second of 5th power divider 401 is defeated
Outlet 3 connects the input terminal 1 of the 7th power divider 403.First output end 2 of the 6th power divider 402 connects
Connect the first end 1 of the third electronic switch 53.The second output terminal 3 of 6th power divider 402 connects the third
The second end 2 of electronic switch 53.First output end 2 of the 7th power divider 403 connects the third electronic switch 53
Third end 3.The second output terminal 3 of 7th power divider 403 connects the 4th end 4 of the third electronic switch 53.
The control terminal 5 of the third electronic switch 53 connects the input terminal 1 of the 8th power divider 404.8th power point
First output end 2 of orchestration 404 connects the input terminal 1 of the 9th power divider 405.8th power divider 404
Second output terminal 3 connect the input terminal 1 of the tenth power divider 406.The first of 9th power divider 405 is defeated
Outlet 2 connects the input terminal 1 of the 11st attenuator 407.The second output terminal 3 of 9th power divider 405 connects
The input terminal 1 of 12nd attenuator 408.First output end 2 of the tenth power divider 406 connects the described 13rd
The input terminal 1 of attenuator 409.The second output terminal 3 of tenth power divider 406 connects the 14th attenuator 410
Input terminal 1.
The output end 2 of 11st attenuator 407 connects the first input end 1 of the 7th power combiner device 411.Institute
The output end 2 for stating the 12nd attenuator 408 connects the second input terminal 2 of the 7th power combiner device 411.Described 13rd declines
The output end 2 for subtracting device 409 connects the first input end 1 of the 8th power combiner device 412.14th attenuator 410
Output end 2 connects the second input terminal 2 of the 8th power combiner device 412.The output end 3 of the 7th power combiner device 411
Connect the first input end 1 of the 9th power combiner device 413.The output end 3 of the 8th power combiner device 412 connects described
Second input terminal 2 of the 9th power combiner device 413.The output end 3 of the 9th power combiner device 413 is used for output signal.
By the series-parallel relationship of multiple power dividers, the phase that 0-360 degree may be implemented becomes the compensation circuit 400
Change, the phase change can connect the third electronic switch 53 by controlling the control terminal 5 of the third electronic switch 53
Unlike signal end be adjusted.Also, effective attenuation can be carried out to signal by multiple attenuator parallel circuits.
The compensation circuit 400 can be applied to first compensation circuit 71, the second compensation circuit 72, third compensation electricity
In road 73 and the 4th compensation circuit 74.
By this design of electronic switch selection mode and efficient compensation circuit, mimo antennas system of the present invention
System 1000 may be implemented to reduce leakage signal and the effective of near-field interference signal.
Finally it should be noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although reference
Preferred embodiment describes the invention in detail, those skilled in the art should understand that, it can be to of the invention
Technical solution is modified or equivalent replacement, without departing from the spirit and scope of the technical solution of the present invention.
Claims (8)
1. a kind of antenna element, including transmitter, receiver, circulator, controller and antenna, the antenna element further include:
The first end of first coupler, first coupler connects the transmitter, first coupling by the first amplifier
The second end of clutch connects the first end of the circulator, and the second end of the circulator connects the antenna；
Second coupler, the first end of second coupler connect the third end of the circulator, second coupler
Second end connects the receiver；
First compensation circuit, the output end of first compensation circuit connect the 4th end of second coupler；
First electronic switch, the first end of first electronic switch connect the transmitter, and the of first electronic switch
Two ends are connected to the third end of first coupler, and the third end of first electronic switch is connected to the first compensation electricity
The input terminal on road；
When the third end of first electronic switch connects the first end of first electronic switch, the antenna element is school
Holotype, the transmitter emit the first signal and mend by the first end and third end of first electronic switch to described first
Circuit is repaid, the transmitter emits first end and second end of first signal also successively through the circulator and is transmitted to the day
Line, first compensation circuit handle output first after first signal and reduce signal to second coupler, and described the
The first end of two couplers receives the second signal of circulator third end transmission, and second coupler is supported described first
Cut signal exports a third signal to the receiver after coupling with the second signal；When the third of first electronic switch
When end connects the second end of first electronic switch, the antenna element is signal compensation mode, the transmitter transmitting the
First end and second end of one signal successively through the circulator are transmitted to the antenna, and the transmitter emits the first signal also
It is transmitted to by first amplifier, first coupler, the second end of first electronic switch and third end described
First compensation circuit, first compensation circuit export the first thermal compensation signal to second coupling after handling first signal
Device, the first end of second coupler receive the second signal of circulator third end transmission, and second coupler will
First thermal compensation signal exports third signal to the receiver after coupling with the second signal.
2. antenna element as described in claim 1, it is characterised in that: first compensation circuit includes a phase-shift circuit and one
Attenuator circuit.
3. antenna element as claimed in claim 2, it is characterised in that: the phase-shift circuit include several power dividers and
Second electronic switch, second electronic switch are used for the phase change of adjustment signal.
4. antenna element as claimed in claim 2, it is characterised in that: the attenuator circuit includes the attenuator of several parallel connections.
5. a kind of MIMO antenna system using codebook, comprising:
First antenna unit, the first antenna unit include the first transmitter, the first receiver, first annular device, the first benefit
Repay circuit, the second compensation circuit, first antenna and the first electronic switch；
Second antenna element, second antenna element include the second transmitter, the second receiver, the second circulator, third benefit
Repay circuit, the 4th compensation circuit, the second antenna and the second electronic switch；
Wherein the first antenna unit further includes the first coupler, the second coupler and third coupler, first coupling
The first end of device connects first transmitter, the second end connection described first of first coupler by the first amplifier
The second end of the first end of circulator, the first annular device connects the first antenna；The first end of second coupler
The third end of the first annular device is connected, the second end of second coupler connects first receiver；Described first
The input terminal of compensation circuit connects the second end of the third coupler, the output end connection of first compensation circuit described the
4th end of two couplers, the third end of the third coupler are connected to the input terminal of the 4th compensation circuit；Described
The first end of one electronic switch connects first transmitter, and the second end of first electronic switch is connected to first coupling
The third end of clutch, the third end of first electronic switch are connected to the first end of the third coupler；Described second day
Line unit further includes the 4th coupler, the 5th coupler and the 6th coupler, and the first end of the 4th coupler passes through second
Amplifier connects second transmitter, and the second end of the 4th coupler connects the first end of second circulator, institute
The second end for stating the second circulator connects second antenna；The first end of 5th coupler connects second circulator
Third end, the second end of the 5th coupler connects second receiver；The input terminal of the third compensation circuit connects
The second end of the 6th coupler is connect, the output end of the third compensation circuit connects the 4th end of the 5th coupler,
The third end of 6th coupler connects the input terminal of second compensation circuit；The first end of second electronic switch connects
Connecing second transmitter, the second end of second electronic switch is connected to the third end of the 4th coupler, and described
The third end of two electronic switches is connected to the first end of the 6th coupler；First and second described compensation circuit is for being directed to
The signal that first receiver receives is reduced, and the third and the 4th compensation circuit are used to receive for described second
The signal that machine receives is reduced；First compensation circuit is used to be supported for the leakage signal of the first annular device
Subtract；Second compensation circuit be used for for received second antenna element of the first antenna near-field interference signal into
Row reduces；The third compensation circuit is used to be reduced for the leakage signal of second circulator；4th compensation
Circuit is used to be reduced for the near-field interference signal of the received first antenna unit of second antenna.
6. MIMO antenna system using codebook as claimed in claim 5, it is characterised in that: the MIMO antenna system using codebook further includes
One system controller, the system controller are separately connected first transmitter, the second transmitter, the first receiver, second
Receiver, first to fourth compensation circuit, the system controller receive signal by detecting first and second described receiver
Signal-to-noise ratio adjust first to fourth compensation circuit.
7. MIMO antenna system using codebook as claimed in claim 5, it is characterised in that: first and second compensation circuit it is defeated
Signal is exported to a power combiner device out, and the power combiner device output first reduces signal to second coupler, described
Second coupler reduces described first after signal is coupled with the second signal of the first annular device output and exports third letter
Number to first receiver.
8. MIMO antenna system using codebook as claimed in claim 5, it is characterised in that: first to fourth compensation circuit is wrapped
Include the attenuator of several parallel connections.
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| CN201610114175.4A CN107146956B (en) | 2016-03-01 | 2016-03-01 | Antenna element and MIMO antenna system using codebook |
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| CN201610114175.4A CN107146956B (en) | 2016-03-01 | 2016-03-01 | Antenna element and MIMO antenna system using codebook |
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| CN109257064A (en) * | 2018-10-30 | 2019-01-22 | 天津津航计算技术研究所 | A kind of double antenna RF front-end module |
| CN110320500B (en) * | 2019-06-10 | 2023-06-13 | 南京理工大学 | High-integration-level low-cost active phased array radar radio frequency front end |
| CN112350689B (en) * | 2020-10-31 | 2023-06-27 | 拓维电子科技(上海)有限公司 | Ultra-wideband digital control phase shifting device and phase control method |
Citations (3)
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|---|---|---|---|---|
| CN102237906A (en) * | 2010-04-20 | 2011-11-09 | 英特赛尔美国股份有限公司 | Systems and methods for improving antenna isolation using signal cancellation |
| CN104569930A (en) * | 2014-12-29 | 2015-04-29 | 北京理工雷科电子信息技术有限公司 | Leakage signal cancellation circuit of linear frequency modulation continuous wave radar |
| CN107147425A (en) * | 2016-03-01 | 2017-09-08 | 南宁富桂精密工业有限公司 | The antenna element of compensation circuit and the application compensation circuit |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102237906A (en) * | 2010-04-20 | 2011-11-09 | 英特赛尔美国股份有限公司 | Systems and methods for improving antenna isolation using signal cancellation |
| CN104569930A (en) * | 2014-12-29 | 2015-04-29 | 北京理工雷科电子信息技术有限公司 | Leakage signal cancellation circuit of linear frequency modulation continuous wave radar |
| CN107147425A (en) * | 2016-03-01 | 2017-09-08 | 南宁富桂精密工业有限公司 | The antenna element of compensation circuit and the application compensation circuit |
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