CN103607235B - Antenna-feedback system access device and antenna-feedback system - Google Patents
Antenna-feedback system access device and antenna-feedback system Download PDFInfo
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- CN103607235B CN103607235B CN201310379901.1A CN201310379901A CN103607235B CN 103607235 B CN103607235 B CN 103607235B CN 201310379901 A CN201310379901 A CN 201310379901A CN 103607235 B CN103607235 B CN 103607235B
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Abstract
The present invention discloses a kind of antenna-feedback system access device, including the first filter, the second filter and inverter bridge.First filter includes the first emission filter, the second emission filter and the first receiving filter；Second filter includes the 3rd emission filter, the 4th emission filter and the second receiving filter；Inverter bridge is connected to the first emission filter, the second emission filter, the 3rd emission filter and the 4th emission filter.Invention additionally discloses a kind of antenna-feedback system, including antenna, antenna-feedback system access device and base transceiver station.By said structure, the present invention can simplify the implementation of antenna-feedback system access device, reduces volume, reduce amplitude imbalance degree and the phase unbalance degree of work(sub-signal simultaneously, and improve all other performance indications.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of antenna-feedback system access device and antenna-feedback system.
Background technology
In some application scenarios of ± 45 ° of cross polarization antenna-feedback systems, in addition it is also necessary to incite somebody to action in addition to needing to ensure diversity reception
Transmission signal becomes vertical polarization signal or horizontal polarization signals in space overlapping, realizes system application block diagram such as Fig. 1 of this function
Shown, including：Base transceiver station（Base Transceiver Station, BTS）, antenna-feedback system access device, ± 45 ° intersection
Poliarizing antenna and cable.Wherein, antenna-feedback system access device includes antenna port ANT1, ANT2, transmitting 1/ reception 1 port
（Transmit1/Receive1, TX1/RX1）And transmitting 2/ reception 2 ports（Transmit2/Receive2, TX2/RX2）End
Mouthful.Antenna port ANT1, ANT2 are used for being connected with ± 45 ° of cross polarised antennas, TX1/RX1 port and TX2/RX2 port and BTS
Connect.
BTS has two transmiting signal sources（Transmission signal 1 and transmission signal 2）, BTS first is by transmission signal 1 and transmitting letter
Numbers 2 are launched to antenna-feedback system access device by the TX1/RX1 port and TX2/RX2 port of antenna-feedback system access device respectively,
Transmission signal 1 Merit Citation Class II is divided into transmission signal 11 and transmission signal 12 by this device, and by transmission signal 11 and transmission signal 12
Access ± 45 ° of cross polarised antennas so as to become vertical polarization signal in space overlapping.Antenna-feedback system access device will be launched simultaneously
Signal 2 Merit Citation Class II is divided into transmission signal 21 and transmission signal 22, and transmission signal 21 and transmission signal 22 are accessed ± 45 ° of intersections
Poliarizing antenna is so as to become horizontal polarization signals in space overlapping.Wherein, the amplitude of transmission signal 11 and transmission signal 12 and phase place
Identical, transmission signal 21 is identical with the amplitude of transmission signal 22, opposite in phase.
Meanwhile, antenna-feedback system access device also can be by its antenna port ANT1 and ANT2 by ± 45 ° of cross polarised antennas
The receipt signal 1 receiving and receipt signal 2 access, and are transferred to BTS, complete the reception diversity of signal.
Wherein, two connection cable electrical length between antenna-feedback system access device and ± 45 ° of cross polarised antennas are identical.
The operation principle block diagram of prior art antenna-feedback system access device is as shown in Fig. 2 include：Duplexer 1, duplexer 2,
Duplexer 3, duplexer 4, electric bridge, 90 ° of phase shifters, cable 1, cable 2, cable 3, cable 4, cable 5, cable 6, ANT1 port,
ANT2 port, TX1/RX1 port and TX2/RX2 port.Wherein, duplexer 1 includes emission filter 1（TX1）, receiving filter
1（RX1）；Duplexer 2 includes TX2 wave filter, RX2 wave filter；Duplexer 3 includes TX3 wave filter, RX3 wave filter；Duplexer 4
Including TX4 wave filter, RX4 wave filter.
Antenna-feedback system access device concrete operating principle is as follows：
Transmission signal 1 from BTS enters from TX1/RX1 port, enters through the TX3 wave filter of duplexer 3 and cable 3
Electric bridge, the transmission signal 11 after branch exports from ANT1 port through the TX1 wave filter of cable 1 and duplexer 1, transmission signal 12
Export from ANT2 port through the TX2 wave filter of 90 ° of phase shifters, cable 2 and duplexer 2；In the same manner, transmission signal 2 is from TX2/RX2
Port enters, and enters electric bridge through the TX4 wave filter of duplexer 4 and cable 4, the transmission signal 21 after branch is through cable 1 He
The TX1 wave filter of duplexer 1 exports from ANT1 port, and transmission signal 22 is through the TX2 of 90 ° of phase shifters, cable 2 and duplexer 2
Wave filter exports from ANT2 port.Through electric bridge and 90 ° of phase shifter effects to phase place jointly, transmission signal 1 is in ANT1 port
The transmission signal 11 obtaining with ANT2 port is identical with the phase place of transmission signal 12, and transmission signal 2 is at ANT1 port and ANT2 end
Transmission signal 21 and the opposite in phase of transmission signal 22 that mouth obtains.Therefore, ensureing respectively to access ± 45 ° of cross polarised antennas
Transmission signal 11 and transmission signal 12, transmission signal 21 and transmission signal 22 amplitude identical in the case of, transmission signal 11
Become vertical polarization signal with transmission signal 12 in space overlapping, transmission signal 21 becomes level pole with transmission signal 22 in space overlapping
Change signal.
In addition, the receipt signal 1 that receives of antenna can RX1 wave filter, cable 5 and duplexer 3 through duplexer 1 RX3
Wave filter, receipt signal 2 the RX4 wave filter of RX2 wave filter, cable 6 and duplexer 4 through duplexer 2 can enter the corresponding of BTS
Receiver, reaches the purpose of diversity reception.
But, the functional realiey of antenna-feedback system access device shown in Fig. 2 need 4 duplexers, 1 common electric bridge, 1
90 ° of phase shifters, 6 cables, connect complicated, debugging difficulty is big, and phase place is difficult to control to（For example：In GSM900 frequency range, cable 1 He
The length difference 0.9mm of cable 2, its phase contrast just has 1 °, and the higher requirement to two cable length differences of frequency is higher）, with
When also have that insertion loss is big, passive intermodulation is poor, system standing-wave ratio is big, volume is big, high cost the shortcomings of.
Content of the invention
The invention mainly solves the technical problem of providing a kind of antenna-feedback system access device and antenna-feedback system, can reduce
The volume of antenna-feedback system access device, simplifies the implementation of antenna-feedback system access device, reduces the amplitude of work(sub-signal simultaneously
Degree of unbalancedness and phase unbalance degree, and improve all other performance indications.
For solving above-mentioned technical problem, one aspect of the present invention is：A kind of antenna-feedback system is provided to access dress
Put, including the first filter, the second filter and inverter bridge；Wherein, the first filter includes the first transmitting filtering
Device, the second emission filter and the first receiving filter；Second filter includes the 3rd emission filter, the 4th transmitting filtering
Device and the second receiving filter；Inverter bridge is connected to the first emission filter, the second emission filter, the 3rd transmitting filter
Ripple device and the 4th emission filter.
Wherein, antenna-feedback system access device also includes：First antenna port, the second antenna port, the first reception/transmitting terminal
Mouth and the second reception/emission port；Wherein, first antenna port, the first reception/emission port are connected to the first filtering dress
Put；Second antenna port, the second reception/emission port are connected to the second filter.
Wherein, inverter bridge has first port, second port, the 3rd port and the 4th port, for will be from the 3rd
The signal work(of port exports from first port and second port, from first port after the signal work(from the 4th port is divided after dividing
With second port output.
Wherein, the first port of inverter bridge, second port, the 3rd port and the 4th port are filtered with the first transmitting respectively
Device, the 3rd emission filter, the second emission filter and the 4th emission filter are connected, wherein, through the second emission filter
The signal of feed-in inverter bridge the 3rd port, is inverted electric bridge work(and is divided into after the two paths of signals that phase contrast is 0 ° respectively from anti-phase electricity
The first port of bridge and second port output, export via the first emission filter and the 3rd emission filter then respectively；Warp
The signal of the 4th emission filter feed-in inverter bridge the 4th port, is inverted electric bridge work(and is divided into the two-way that phase contrast is 180 ° to believe
Export from the first port of inverter bridge and second port respectively after number, then respectively via the first emission filter and the 3rd
Penetrate wave filter output.
Wherein, between inverter bridge, the first emission filter and first antenna port signal transmission path topological structure
The topological structure of signal transmission path is identical between inverter bridge, the 3rd emission filter and the second antenna port.
Wherein, the physical arrangement of the first emission filter and the 3rd emission filter is identical.
Wherein, the first emission filter, the second emission filter, the 3rd emission filter and the 4th emission filter frequency range
Identical, it is the transmitting frequency range of the first filter and the second filter.
Wherein, the frequency range of the first receiving filter and the second receiving filter is identical, is the first filter and the second filter
The reception frequency range of wave apparatus.
For solving above-mentioned technical problem, one aspect of the present invention is：A kind of antenna-feedback system is provided, including：
Antenna, antenna-feedback system access device and base transceiver station, antenna-feedback system access device is connected to antenna and base transceiver station；
Wherein, antenna-feedback system access device includes the first filter, the second filter and inverter bridge；First filter includes
First emission filter, the second emission filter and the first receiving filter；Second filter include the 3rd emission filter,
4th emission filter and the second receiving filter；Inverter bridge is connected to the first emission filter, the second transmitting filtering
Device, the 3rd emission filter and the 4th emission filter.
Wherein, antenna-feedback system is used for the signal launching base transceiver station through antenna-feedback system access device, antenna, makes to send out
Penetrate signal and become vertical polarization signal or horizontal polarization signals in space overlapping；Wherein, transmission signal is multiple in base transceiver station
The signal of signal source transmitting.
Wherein, antenna-feedback system is used for the signal receiving antenna through antenna-feedback system access device, base transceiver station, makes to connect
Diversity reception is realized in the collection of letters number；Wherein, receipt signal is multipath reception signal.
The invention has the beneficial effects as follows：It is different from the situation of prior art, the antenna-feedback system access device of the present invention utilizes
The general electric bridge of inverter bridge replacement prior art and 90 ° of phase shifters, being concurrently accessed device only needs two receiving filters, and
In the connection procedure of each device, cancel the connected mode of cable.By said structure, the present invention can reduce antenna-feedback system and access
The volume of device, simplifies the implementation of antenna-feedback system access device, reduces amplitude imbalance degree and the phase of work(sub-signal simultaneously
Position degree of unbalancedness, and improve all other performance indications.
Brief description
Fig. 1 is prior art antenna-feedback system application block diagram；
Fig. 2 is prior art antenna-feedback system access device operation principle block diagram；
Fig. 3 is the structural representation of antenna-feedback system access device one embodiment of the present invention；
Fig. 4 is the structural representation of antenna-feedback system one embodiment of the present invention.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
Refer to Fig. 3, antenna-feedback system access device one embodiment of the present invention includes：First filter, the second filtering dress
Put and inverter bridge.
Wherein, the first filter includes the first emission filter（Transmit, TX1）, the second emission filter
（Transmit, TX2）With the first receiving filter（Receive, RX1）；Second filter includes the 3rd emission filter
（Transmit, TX3）, the 4th emission filter（Transmit, TX4）With the second receiving filter（Receive, RX2）；Anti-phase
Electric bridge is connected to the first emission filter, the second emission filter, the 3rd emission filter and the 4th emission filter.
In the present embodiment, antenna-feedback system access device also includes：First antenna port（ANT1）, the second antenna port
（ANT2）, the first reception/emission port（TX1/RX1）And the second reception/emission port（TX2/RX2）；Wherein, first antenna end
Mouth, the first reception/emission port are connected to the first filter；Second antenna port, the second reception/emission port are respectively
It is connected to the second filter.
In the present embodiment, inverter bridge has first port B1, second port B2, the 3rd port B3 and the 4th port
B4, for exporting from first port B1 and second port B2 after dividing the signal work(from the 3rd port B3, will be from the 4th end
The signal work(of mouth B4 exports B2 from first port B1 and second port after dividing.
Further, first port B1 of inverter bridge, second port B2, the 3rd port B3 and the 4th port B4 are respectively with
One emission filter, the 3rd emission filter, the second emission filter and the 4th emission filter are connected, wherein, through second
The signal of emission filter feed-in inverter bridge the 3rd port B3, is inverted after electric bridge work(is divided into the two paths of signals that phase contrast is 0 °
Export from first port B1 of inverter bridge and second port B2 respectively, then respectively via the first emission filter and the 3rd
Penetrate wave filter output；Signal through the 4th emission filter feed-in inverter bridge the 4th port B4, is inverted electric bridge work(and is divided into phase
Potential difference is to export from first port B1 of inverter bridge and second port B2 respectively after 180 ° of two paths of signals, then respectively via
First emission filter and the output of the 3rd emission filter.
Wherein, the structure of inverter bridge is, inverter bridge include homophase power splitter and with homophase power splitter common output
The wideband balun of mouth B1, B2.
Homophase power splitter includes two wires, is respectively used to connect the 3rd port B3 and first port B1, second port B2.
Homophase power splitter by the signal work(of its 3rd port B3 feed-in be divided into after two-way phase place identical signal respectively from first port B1,
Second port B2 exports.
Wideband balun includes three wires, wire 1 be connected to the 4th port B4 and open circuit port, wire 2,3 respectively with lead
The first half of line 1, latter half are just right, and to form two sections of λ/4 coupling lines respectively, its degree of coupling is 3dB, and wire 2 is even
It is connected to first port B1 and grounding ports, wire 3 is connected to second port B2 and grounding ports.Wideband balun will be from its 4th end
Respectively from the signal of first port B1, second port B2 output two-way opposite in phase after the signal processing of mouth B4 input.
The cavity that homophase power splitter also includes dielectric-slab and constitutes ground.In homophase power splitter, wire, dielectric-slab and cavity structure
Become microstrip transmission line, its characteristic impedance is 70.7 ohm.
Wideband balun also includes constituting two cavitys on ground.In wideband balun, wire and cavity constitute parallel coupled line.
In the present embodiment, the first emission filter, the second emission filter, the 3rd emission filter and the 4th transmitting filter
Ripple device frequency range is identical, is the transmitting frequency range of the first filter and the second filter.First receiving filter and the second reception
The frequency range of wave filter is identical, is the reception frequency range of the first filter and the second filter.
In the present embodiment, inverter bridge is divided for carrying out work(to input signal therein, the letter of output after work(can be made to divide
Number phase place is identical or contrary, and specially the two paths of signals in input inversion electric bridge is completely isolated, as shown in figure 3, from inverter bridge
The signal work(of lower left input divides rear phase place identical, and phase contrast is 0 °；Divide rear phase from the signal work(of inverter bridge lower right input
Position is contrary, and phase contrast is 180 °.
Illustrate the operation principle of the present embodiment antenna-feedback system access device in detail below.
The antenna-feedback system access device of the present embodiment is applied to antenna-feedback system, first TX1/RX1 port and TX2/RX2 port
The transmission signal 1 of input BTS transmitting and transmission signal 2 respectively, transmission signal 1 enters inverter bridge, transmitting through TX2 wave filter
Signal 2 enters inverter bridge through TX4 wave filter.
Then, the transmission signal 1 of input and transmission signal 2 Merit Citation Class II are divided output by inverter bridge respectively, wherein, transmitting letter
Number 1 work(is divided into transmission signal 11 and transmission signal 12, and transmission signal 2 work(is divided into transmission signal 21 and transmission signal 22.Anti-phase electricity
The transmission signal 11 of bridge output exports from ANT1 port through TX1 wave filter, and transmission signal 12 is through TX3 wave filter from ANT2 end
Mouth output.In the same manner, the transmission signal 21 of inverter bridge output exports from ANT1 port through TX1 wave filter, transmission signal 22 warp
Cross TX3 wave filter to export from ANT2 port.Make the transmission signal 11 of output identical with transmission signal 12 phase place using inverter bridge,
Transmission signal 21 and transmission signal 22 opposite in phase.
ANT1 port and ANT2 port are connected with one of ± 45 ° of cross polarised antennas respectively, therefore access ± 45 ° of intersections
The transmission signal 11 of poliarizing antenna becomes vertical polarization signal with transmission signal 12 in space overlapping.Access ± 45 ° of cross polarization skies
The transmission signal 21 of line becomes horizontal polarization signals with transmission signal 22 in space overlapping.
The antenna-feedback system access device of the present embodiment has following features：
A. connect antenna identical with the electrical length of ANT1 port, two cables of ANT2 port；
B. transmission signal 11 and transmission signal 12 topological structure through path identical, transmission signal 21 and transmission signal
22 topological structure through path identical.I.e. between inverter bridge, the first emission filter and first antenna port, signal passes
The topology of signal transmission path between the topological structure in defeated path and inverter bridge, the 3rd emission filter and the second antenna port
Structure is identical.
C.TX1 wave filter and the topological structure of TX3 wave filter, and its identical with the structure that inverter bridge connects.More preferably,
TX1 wave filter is identical with the physical arrangement of TX3 wave filter.
By These characteristics, the phase unbalance degree of signal can be ensured with amplitude imbalance degree simultaneously.In this enforcement
Example in it is contemplated that the phase fluctuation of inverter bridge itself and distribution loss fluctuation impact, the phase place of antenna-feedback system access device
Degree of unbalancedness can accomplish≤4 °（Homophase or anti-phase）, amplitude imbalance degree can accomplish≤0.2dB.
In the present embodiment, inverter bridge is 180 ° of 3dB electric bridges.
The antenna-feedback system access device of the present embodiment applies also for the diversity reception of signal, and its operation principle is as follows：
ANT1 port and ANT2 port input receipt signal 1 and the receipt signal 2 that antenna receives respectively first.Then, connect
The collection of letters number 1 exports from TX1/RX1 port through RX1 wave filter, and receipt signal 2 is defeated from TX2/RX2 port through RX2 wave filter
Go out.Finally enter BTS, complete the reception diversity of signal.
Compared with prior art, receipt signal 1 or receipt signal 2 only need a reception when antenna-feedback system access device
Wave filter, thus can reduce loss, simplify antenna-feedback system access device circuit design.
Wherein, in the present embodiment antenna-feedback system access device, by TX1, TX2, TX3, TX4 wave filter can be to branch before
Transmission signal afterwards is filtered and provides sufficiently high transceiver insulation；By RX1 wave filter and RX2 wave filter, can be right respectively
Receipt signal 1 and receipt signal 2 are filtered and provide sufficiently high transceiver insulation, thus reaching the purpose of diversity reception.
Refer to Fig. 4, antenna-feedback system one embodiment of the present invention, including：Antenna 41, antenna-feedback system access device 42 and base station
Sending and receiving stations 43.
Wherein, antenna-feedback system access device 42 is connected to antenna 41 and base transceiver station 43.
Wherein, the structure of antenna-feedback system access device 42 is identical with the antenna-feedback system access device shown in Fig. 3, and here is no longer
Repeat.
Wherein, antenna 41 is ± 45 ° of cross polarised antennas.
In the present embodiment, antenna-feedback system function is as follows：
A. antenna-feedback system is used for the signal launching base transceiver station 43 through antenna-feedback system access device 42, antenna 41,
Transmission signal is made to become vertical polarization signal or horizontal polarization signals in space overlapping；Wherein, transmission signal is base transceiver station 43
In the transmitting of multiple signal sources signal.
B. antenna-feedback system is used for the signal receiving antenna 41 through antenna-feedback system access device 42, base transceiver station 43,
Receipt signal is made to realize diversity reception；Wherein, receipt signal is multipath reception signal.
Compared with prior art, antenna-feedback system access device of the present invention adopts coaxial cavity filter and built-in anti-phase electricity
The mode of bridge, the function of electric bridge common in prior art, 90 ° of phase shifters and wave filter is integrated, saves in prior art
Electric bridge, 90 ° of phase shifters and cable.Meanwhile, antenna-feedback system access device of the present invention only comprises two receiving filters.By upper
State structure, in addition to distribution loss, the insertion loss of each transmitting path only has corresponding two to the antenna-feedback system access device of the present invention
The insertion loss of individual TX wave filter, the insertion loss of the insertion loss only one of which RX wave filter of each receiving path.Meanwhile, profit
It is easy to the advantage debugged with coaxial cavity filter of the present invention, its amplitude imbalance degree and phase unbalance degree are all easily adjusted easily
Control.Further, since access device of the present invention avoids the connection of complexity, can significantly reduce device volume, reduces cost, be suitable to big
Batch production.Meanwhile, also multinomial important indicator can be improved, after such as improving, system standing-wave ratio is little, insertion loss is little, passive intermodulation
Low, interport isolation is high, power capacity is big etc..
In sum, the antenna-feedback system access device of the present invention utilize inverter bridge replace prior art general electric bridge and
90 ° of phase shifters, being concurrently accessed device only needs two receiving filters, and in the connection procedure of each device, cancels the company of cable
Connect mode.By said structure, the present invention can reduce the volume of antenna-feedback system access device, simplifies antenna-feedback system access device
Implementation, reduce the amplitude imbalance degree of work(sub-signal and phase unbalance degree simultaneously, and improve all other performances and refer to
Mark.
The foregoing is only embodiments of the invention, not thereby limit the present invention the scope of the claims, every using this
Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (11)
1. a kind of antenna-feedback system access device is it is characterised in that include the first filter, the second filter and anti-phase electricity
Bridge；
Wherein, described first filter includes the first emission filter, the second emission filter and the first receiving filter；Institute
State the second filter and include the 3rd emission filter, the 4th emission filter and the second receiving filter；Described inverter bridge
It is connected to described first emission filter, the second emission filter, the 3rd emission filter and the 4th emission filter.
2. antenna-feedback system access device according to claim 1 is it is characterised in that described antenna-feedback system access device also wraps
Include：First antenna port, the second antenna port, the first reception/emission port and the second reception/emission port；
Wherein, described first antenna port, the first reception/emission port are connected to the first filter；Described second day
Line end mouth, the second reception/emission port are connected to the second filter.
3. antenna-feedback system access device according to claim 2 is it is characterised in that described inverter bridge has first end
Mouth, second port, the 3rd port and the 4th port, for after the signal work(from the 3rd port is divided from described first port and
Second port exports, and exports from described first port and second port after the signal work(from the 4th port is divided.
4. antenna-feedback system access device according to claim 3 it is characterised in that the first port of described inverter bridge,
Second port, the 3rd port and the 4th port are filtered with described first emission filter, the 3rd emission filter, the second transmitting respectively
Ripple device and the 4th emission filter are connected, wherein, letter through described second emission filter feed-in inverter bridge the 3rd port
Number, it is divided into after the two paths of signals that phase contrast is 0 ° respectively from first port and second end of inverter bridge by described inverter bridge work(
Mouth output, exports via the first emission filter and the 3rd emission filter then respectively；Through described 4th emission filter feedback
Enter the signal of inverter bridge the 4th port, be divided into after the two paths of signals that phase contrast is 180 ° respectively from anti-by described inverter bridge work(
The first port of phase electric bridge and second port output, then defeated via the first emission filter and the 3rd emission filter respectively
Go out.
5. antenna-feedback system access device according to claim 4 is it is characterised in that described inverter bridge, the first transmitting are filtered
The topological structure of signal transmission path and described inverter bridge between ripple device and first antenna port, the 3rd emission filter and the
Between two antenna ports, the topological structure of signal transmission path is identical.
6. antenna-feedback system access device according to claim 5 is it is characterised in that described first emission filter and the 3rd
The physical arrangement of emission filter is identical.
7. antenna-feedback system access device according to claim 6 it is characterised in that described first emission filter, second
Emission filter, the 3rd emission filter and the 4th emission filter frequency range are identical, are described first filter and the second filter
The transmitting frequency range of wave apparatus.
8. antenna-feedback system access device according to claim 7 is it is characterised in that described first receiving filter and second
The frequency range of receiving filter is identical, is the reception frequency range of described first filter and the second filter.
9. a kind of antenna-feedback system is it is characterised in that include：Antenna, antenna-feedback system access device and base transceiver station, described antenna feeder
System access device is connected to antenna and base transceiver station；
Wherein, described antenna-feedback system access device includes the first filter, the second filter and inverter bridge；Described first
Filter includes the first emission filter, the second emission filter and the first receiving filter；Described second filter bag
Include the 3rd emission filter, the 4th emission filter and the second receiving filter；Described inverter bridge is connected to described
One emission filter, the second emission filter, the 3rd emission filter and the 4th emission filter.
10. antenna-feedback system according to claim 9 is it is characterised in that described antenna-feedback system is used for described base station transceiver
The signal of platform transmitting, through described antenna-feedback system access device, antenna, makes described transmission signal become vertical polarization in space overlapping
Signal or horizontal polarization signals；
Wherein, described transmission signal is the signal of multiple signal source transmittings in base transceiver station.
11. antenna-feedback systems according to claim 10 are it is characterised in that described antenna-feedback system is used for receiving described antenna
Signal through described antenna-feedback system access device, base transceiver station, make described receipt signal realize diversity reception；
Wherein, described receipt signal is multipath reception signal.
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| CN102610920B (en) * | 2012-03-22 | 2014-12-24 | 中国联合网络通信集团有限公司 | Antenna-feeder system and phase calibration method |
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