CN109755746A - Feeding network and three beam antennas - Google Patents
Feeding network and three beam antennas Download PDFInfo
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- CN109755746A CN109755746A CN201811639756.5A CN201811639756A CN109755746A CN 109755746 A CN109755746 A CN 109755746A CN 201811639756 A CN201811639756 A CN 201811639756A CN 109755746 A CN109755746 A CN 109755746A
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Abstract
This application involves a kind of feeding network and three beam antennas, feeding network includes Combining Circuit, filtering isolation circuit, the first butler matrix and the second butler matrix.Each combining port of Combining Circuit is respectively used to the first phase-shift network of connection, the second phase-shift network and third phase-shift network.Each first port of filtering isolation circuit is for connecting aerial array.The working frequency and output difference of first butler matrix, the respectively lower than working frequency of the second butler matrix and output difference.Each first port of first butler matrix and each first port of the second butler matrix, are separately connected each branch port of Combining Circuit.Each second port of first butler matrix is sequentially connected each second port of filtering isolation circuit.Each second port of second butler matrix is sequentially connected each third port of filtering isolation circuit.By Combining Circuit, the design of filtering isolation circuit and the second butler matrix, the first butler matrix of cooperation improves antenna covering performance.
Description
Technical field
This application involves fields of communication technology, more particularly to a kind of feeding network and three beam antennas.
Background technique
With the development of communication technology, there are three beam antenna technologies, be the important technical for realizing sector dilatation
One of.Three traditional beam antennas the part such as aerial array, feeding network and phase-shift network mainly by being made of, wherein feed
Network is mainly made of butler matrix.In three traditional beam antennas, when the frequency expansion ultra wide band of support, such as state
Interior operator 1710-2690MHz frequency range, since the array pitch of aerial array is only capable of according to center frequency point choosing in working frequency range
When taking, therefore being fed using butler matrix, the beam position of high band and low-frequency range has bigger difference.
However, inventor has found three traditional beam antennas in realizing process of the present invention, Butler that when design is chosen
The phase difference of matrix is 90 °, and although each operator requires antenna to support ultra wideband frequency, but in application of actually arranging net, past
Toward being two narrow frequencies of high frequency+low frequency, it there is a problem that antenna covering performance is poor.
Summary of the invention
Based on this, it is necessary in view of the above technical problems, provide a kind of feed that can effectively improve antenna covering performance
Network and a kind of three beam antennas.
To achieve the above object, the embodiment of the present invention uses following technical scheme:
On the one hand, the embodiment of the present invention provides a kind of feeding network, including Combining Circuit, filtering isolation circuit, first bar
Teller matrix and the second butler matrix, each combining port of Combining Circuit are respectively used to the first phase-shift network of connection, the second shifting
Phase network and third phase-shift network filter each first port of isolation circuit for connecting aerial array；Wherein, the first Butler
The working frequency and output difference of matrix, the respectively lower than working frequency of the second butler matrix and output difference；
Each first port of first butler matrix and each first port of the second butler matrix are separately connected combining electricity
Each branch port on road；Each second port of first butler matrix is sequentially connected each second port of filtering isolation circuit, the
Each second port of two butler matrixs is sequentially connected each third port of filtering isolation circuit.
In one of the embodiments, in each second port of the second butler matrix, between two neighboring second port
Phase difference be first setting difference.
The second butler matrix includes the first power splitter, the first electric bridge, the second electric bridge, the in one of the embodiments,
Three electric bridges, the 4th electric bridge, the first fixed phase shifter and the second fixed phase shifter；
The first port of first power splitter and the first port of the first electric bridge and the second electric bridge are separately connected Combining Circuit
Each branch port；The second port of first power splitter connects the second port of the first electric bridge, the third port of the first power splitter
Connect the second port of the second electric bridge；
The third port of first electric bridge connects the first port of third electric bridge, the first electric bridge by the first fixed phase shifter
The 4th port connect the 4th electric bridge first port；
The third port of second electric bridge connects the second port of the 4th electric bridge, the second electric bridge by the second fixed phase shifter
The 4th port connection third electric bridge second port；
The third port of third electric bridge and the third port and the 4th port of the 4th port and the 4th electric bridge are separately connected
Filter each third port of isolation circuit.
In one of the embodiments, in each second port of the first butler matrix, between two neighboring second port
Phase difference be second setting difference.
The first butler matrix includes the 5th electric bridge, the 6th electric bridge, the 7th electric bridge, second in one of the embodiments,
Power splitter, third fixed phase shifter and the 4th fixed phase shifter, the first port and second port of the 5th electric bridge and the second function
The first port for dividing device, is separately connected each branch port of Combining Circuit；
The third port of 5th electric bridge connects the first port of the 6th electric bridge, the 7th electricity of the 4th port connection of the 5th electric bridge
The first port of bridge；The second port of second power splitter connects the second port of the 6th electric bridge, the third port of the second power splitter
Connect the second port of the 7th electric bridge；
The first port of the third port connection third fixed phase shifter of 6th electric bridge, the third port connection of the 7th electric bridge
The first port of 4th fixed phase shifter；
4th port of the 6th electric bridge, the second port of third fixed phase shifter, the 7th electric bridge the 4th port and the 4th
The second port of fixed phase shifter is separately connected each second port of filtering isolation circuit.
In one of the embodiments, Combining Circuit include the first combiner, the second combiner and third combiner, first
The combining port of combiner is for connecting the first phase-shift network, and the combining port of the second combiner is for connecting the second phase shift net
Network, the combining port of third combiner is for connecting third phase-shift network；
First branch port of the first combiner, the second combiner and third combiner is separately connected the first Butler square
Each first port of battle array；Second branch port of the first combiner, the second combiner and third combiner, is separately connected second bar
Each first port of Teller matrix.
Filtering isolation circuit includes at least three duplexers, each second end of each duplexer in one of the embodiments,
Mouth is separately connected each second port of the first butler matrix, and each third port of each duplexer is separately connected the second Butler square
Each second port of battle array.
The first electric bridge, the second electric bridge, third electric bridge and the 4th electric bridge are 90 degree of electric bridges in one of the embodiments,
First fixed phase shifter and the second fixed phase shifter are negative 45 degree of phase-shifters.
The 5th electric bridge, the 6th electric bridge and the 7th electric bridge are 90 degree of electric bridges in one of the embodiments, third stationary phase
Device and the 4th fixed phase shifter is moved to be negative 90 degree of phase-shifters.
On the other hand, the embodiment of the present invention provides a kind of three beam antennas, including aerial array, the first phase-shift network, the
Two phase-shift networks and third phase-shift network and above-mentioned feeding network.
A technical solution in above-mentioned technical proposal is had the following advantages and beneficial effects:
Above-mentioned feeding network and three beam antennas pass through Combining Circuit, filtering isolation circuit and the second butler matrix
Extension design, cooperates the first butler matrix, the working frequency range where feeding network can be divided into two narrow frequencies and provided
Different differences.In this way, passing through the first butler matrix and second bar in the constant situation of array pitch for keeping aerial array
Teller matrix provides different differences, so that the direction of three wave beams is more concentrated, solves ultra-wide applied by feeding network
Frequently the problem of beam position of three beam antennas is with frequency divergence effectively increases antenna covering performance.
Detailed description of the invention
Fig. 1 is the first structure diagram of feeding network in one embodiment；
Fig. 2 is the structural schematic diagram of the second butler matrix in one embodiment；
Fig. 3 is the structural schematic diagram of the first butler matrix in one embodiment；
Fig. 4 is the second structural schematic diagram of feeding network 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 it can be directly to separately when an element is considered as " connection " another element
One element and it is in combination be integrated, or may be simultaneously present centering elements.Unless otherwise defined, institute used herein
Some technical and scientific terms are identical as the normally understood meaning of the those skilled in the art for belonging to the application.Exist herein
Term used in the description of the present application, which is only for the purpose of describing specific embodiments, is not intended to limit this Shen
Please.Term " and or " used herein includes any and all combinations of one or more related listed items.
Referring to Fig. 1, in one embodiment, the present invention provides a kind of feeding network 100, including Combining Circuit 12, filter
Wave isolation circuit 14, the first butler matrix 16 and the second butler matrix 18.It uses respectively each combining port of Combining Circuit 12
In the first phase-shift network 21 of connection, the second phase-shift network 22 and third phase-shift network 23.Filter each first end of isolation circuit 14
Mouth is for connecting aerial array 25.Wherein, the working frequency of the first butler matrix 16 and output difference, respectively lower than second bar
The working frequency and output difference of Teller matrix 18.Each first port of first butler matrix 16 and the second butler matrix 18
Each first port, be separately connected each branch port of Combining Circuit 12.Each second port of first butler matrix 16 is successively
Each second port of connection filtering isolation circuit 14.Each second port of second butler matrix 18 is sequentially connected filtering isolation electricity
Each third port on road 14.
Wherein, the first phase-shift network 21, the second phase-shift network 22 and third phase-shift network 23 are that this field ultra wide band is double
It is worked in poliarizing antenna in the phase-shift network of setting working frequency range, is respectively corresponded as the phase-shift network of three wave beams.Aerial array
25 be the aerial array in this field ultra wideband dual polarization antenna, is made of mutiple antennas radiating element.Set working frequency range as
When 100 practical application of feeding network, frequency range that place antenna uses.Such as the ultra wide band working frequency range 1710- of operator
2690MHz.In traditional practical application, ultra wide band working frequency range 1710-2690MHz can be divided into 1710MHz-2170MHz and
Two frequency sub-band of 2500MHz-2690MHz, when feed-in radiofrequency signal, the 1710MHz-2170MHz that butler matrix is formed is frequently
The horizontal plane wave beam of section and the horizontal plane wave beam of 2500MHz-2690MHz frequency range, are respectively outputted to the first phase-shift network 21, second
Phase-shift network 22 and third phase-shift network 23 form the output of three wave beams.Furthermore in tradition application, the phase difference of butler matrix is
90 degree, the direction deviation for often leading to each wave beam in ultra-wideband working frequency range is very big.
By taking above-mentioned ultra wide band working frequency range 1710-2690MHz as an example, in this application, the first butler matrix 16
Working frequency can be corresponding with 1710MHz-2170MHz frequency range, i.e. the working frequency of the first butler matrix 16 is
The working frequency of frequency in 1710MHz-2170MHz frequency range, the second butler matrix 18 can be with 2500MHz-2690MHz frequency
Section is corresponding, i.e., the working frequency of the second butler matrix 18 is the frequency in 2500MHz-2690MHz frequency range.First Butler
Matrix 16 output difference refers in each output port of the first butler matrix 16, adjacent port (by port difference be incremented by or
The sequence that person successively decreases) output radiofrequency signal phase difference.Second butler matrix 18 can similarly understand, and the second Butler
The output that the output difference of matrix 18 is higher than the first butler matrix 16 differs.
Filtering isolation circuit 14 is the signal filtering and isolation circuit that duplexer or multiplexer form, for that will emit and connect
Mutual isolation between the collection of letters number guarantees that receiving signal and the treatment process of transmitting signal can while normally realize.Combining electricity
Road 12 is signal Combining Circuit 12, and two for transmitting the first butler matrix 16 and the second butler matrix 18 are not
After the signal of same frequency is combined respectively, it is transferred to the first phase-shift network 21, the second phase-shift network 22 and third phase-shift network
23；Alternatively, being passed after the signal that the first phase-shift network 21, the second phase-shift network 22 and third phase-shift network 23 export is distinguished branch
It is defeated to the first butler matrix 16 and the second butler matrix 18.First butler matrix 16 and the second butler matrix 18 difference
For providing the beam-forming network of the signal of two different frequency sub-band.
Access filtering isolation circuit 14, aerial array 25 can be made between aerial array 25 and butler matrix
Ultra wide band working frequency range is divided into two narrow frequencies, namely corresponds respectively to the first butler matrix 16 and the second Butler square
The frequency sub-band of battle array 18.First butler matrix 16 and the second butler matrix 18 then receive the beam position of two narrow frequencies
It holds back to set angle, such as near 30 degree, can specifically be selected according to antenna applications.In signal receive process
In, the signal of different frequency sub-band, will by Combining Circuit 12 after the first butler matrix 16 and the second butler matrix 18
Two paths of signals is combined to obtain three wave beams, is exported respectively to the first phase-shift network 21, the second phase-shift network 22 and third phase-shift network
23, for transmission to the antenna rf for being respectively connected to the first phase-shift network 21, the second phase-shift network 22 and third phase-shift network 23
Input port.
In this way, ultra wide band working frequency range can be divided into two narrow frequencies, make frequency by above-mentioned feeding network 100
The signal of lower frequency sub-band passes through the small difference beam-forming network that the first butler matrix 16 provides, and makes the higher son of frequency
The signal of frequency range passes through the big difference beam-forming network that the second butler matrix 18 provides.It realizes in peer antenna array 25
Under array pitch, with different differences so that the beam position of height frequency range is more concentrated, solves feeding network 100 and applied
Three beam antenna of ultra-wideband beam position with frequency divergence the problem of, effectively improve antenna covering performance.
In one embodiment, each first port of the first above-mentioned butler matrix 16 can with signal input port,
It can be signal output port.Correspondingly, each second port of the first butler matrix 16 can also be with signal input port, it can also
To be signal output port.Can similarly it understand about the second butler matrix 18.Filter each second port of isolation circuit 14
It can also be also possible to signal output port with signal input port；Each first port for filtering isolation circuit 14 can also be with signal
Input port is also possible to signal output port.Can similarly it understand about Combining Circuit 12.
For example, for signal receive process, each first port of isolation circuit 14 is filtered as signal input port,
Each second port of isolation circuit 14 is filtered as signal output port；First butler matrix 16 and the second butler matrix 18
Each second port be used as signal input port, each first port of the first butler matrix 16 and the second butler matrix 18
Each first port be used as signal output port.The branch port of Combining Circuit 12 is as signal input port, Combining Circuit
12 each combining port is as signal output port.
For signal emission process, each combining port of Combining Circuit 12 is as signal input port, Combining Circuit
12 branch port is as signal output port.Each first port of first butler matrix 16 and the second butler matrix 18
Each first port is used as signal input port, and each second port of the first butler matrix 16 and the second butler matrix 18 is equal
As signal output port.Each second port of isolation circuit 14 is filtered as signal input port, filters isolation circuit 14
Each first port is as signal output port.The input and output of specific each port can be received according to the signal of feeding network 100
Or the flow direction of signal determines in emission process, does in this specification and does not limit, as long as can be realized normal signal transmission
Function.The specific port of each device can similarly understand in following embodiments.
In one embodiment, in each second port of the first butler matrix 16, between two neighboring second port
Phase difference is the second setting difference.It is appreciated that in the above-described embodiments, the convergence of different set working frequency range and beam position
Angle is different, and the butler matrix of different phase of output signal differences can be used.The second above-mentioned setting difference, can be 90
Degree, is also possible to difference more slightly larger than 90 degree or slightly smaller, such as can be in 88 degree~92 degree continuous or discrete phase differences
Any phase difference, as long as be conducive to reduce beam position deviation.
In the present embodiment, the phase difference between each second port of the first butler matrix 16 namely signal emitted
Cheng Zhong, the phase difference between the output signal of the first butler matrix 16 can be 90 degree.So as to realize, do not changing
In the case of the array pitch for having aerial array 25, after so that the signal of the lower frequency sub-band of frequency is passed through the first butler matrix 16,
The direction for being formed by wave beam converges near special angle.By above-mentioned, 16 beam-forming network of the first butler matrix,
It can effectively realize the convergence purpose of beam position.
In one embodiment, in each second port of the second butler matrix 18, between two neighboring second port
Phase difference is the first setting difference.It is appreciated that the first above-mentioned setting difference, can be 135 degree, is also possible to than 135 degree
Slightly larger or slightly smaller difference, such as can be any phase difference in 133 degree~137 degree continuous or discrete phase differences, only
To be conducive to reduce beam position deviation.Phase between the output signal of second butler matrix 18 in the present embodiment
In difference namely signal emission process, the phase difference between each second port of the second butler matrix 18 can be 135 degree.From
And may be implemented, when not changing the array pitch of existing aerial array 25, keep the signal of the higher frequency sub-band of frequency logical
After crossing the second butler matrix 18, the direction for being formed by wave beam is converged near aforementioned special angle.With above-mentioned operator
Ultra wide band working frequency range 1710-2690MHz for, when the array pitch of aerial array 25 is selected as 75mm, for lowest frequency
Point 1710MHz is equivalent to 0.428 wavelength, and is equivalent to 0.676 wavelength for highest frequency point 2690MHz frequency point；Same
When the radiofrequency signal of feed-in phase quadrature, the direction of the horizontal plane wave beam of the horizontal plane wave beam and 1710MHz of 2690MHz restrains
It near 30 degree, and is no longer that there are biggish offsets.
It, can by the double-matrix beam-forming network of above-mentioned the first butler matrix 16 and the second butler matrix 18
More effectively to realize the convergence purpose of beam position, the wave beam for better solving three beam antenna of ultra-wideband in practical application refers to
The problem of to frequency divergence, effectively increases antenna covering performance.
Referring to Fig. 2, in one embodiment, the second butler matrix 18 includes the first power splitter 182, the first electric bridge
183, the second electric bridge 184, third electric bridge 185, the 4th electric bridge 186, the first fixed phase shifter 187 and the second fixed phase shifter 188.
The first port of first power splitter 182 and the first port of the first electric bridge 183 and the second electric bridge 184 are separately connected combining electricity
Each branch port on road 12.The second port of first power splitter 182 connects the second port of the first electric bridge 183.First power splitter
182 third port connects the second port of the second electric bridge 184.The third port of first electric bridge 183 passes through the first fixed phase drift
Device 187 connects the first port of third electric bridge 185.4th port of the first electric bridge 183 connects the first end of the 4th electric bridge 186
Mouthful.The third port of second electric bridge 184 connects the second port of the 4th electric bridge 186 by the second fixed phase shifter 188.Second
The second port of the 4th port connection third electric bridge 185 of electric bridge 184.The third port of third electric bridge 185 and the 4th port, with
And the 4th electric bridge 186 third port and the 4th port be separately connected filtering isolation circuit 14 each third port.
It is appreciated that the quantity of each branch port of Combining Circuit 12 can be six, it is also possible to six or more, specifically
Quantity can according to the design of the first butler matrix 16 and the second butler matrix 18 it needs to be determined that.For above-mentioned second bar
Teller matrix 18, the first power splitter 182 can be three port power dividers of this field routine, for realizing the distribution of signal power
Extension.Each electric bridge and fixed phase shifter are respectively configured to provide the phase adjustment of unlike signal phase, to adjust the phase by signal
Position, to realize third port and the 4th port and third port and the 4th end of the 4th electric bridge 186 of third electric bridge 185
In mouthful, the phase difference of the output signal between two neighboring port is 135 degree.
Such as by the third port of third electric bridge 185, the third port of the 4th electric bridge 186, third electric bridge 185 the 4th end
Mouth to the port of the 4th port of the 4th electric bridge 186 puts in order, and the output phase of the third port of third electric bridge 185 is 0 degree,
The third port output phase of 4th electric bridge 186 is 135 degree, and the 4th port output phase of third electric bridge 185 is 270 degree, the
4th port output phase of four electric bridges 186 is 405 degree；Alternatively, the third port output phase of third electric bridge 185 is 405 degree,
The third port output phase of 4th electric bridge 186 is 270 degree, and the 4th port output phase of third electric bridge 185 is 135 degree, the
4th port output phase of four electric bridges 186 is 0 degree, and the phase difference between two neighboring port is 135 degree.First electric bridge
The first port of 183 first port and the second electric bridge 184, it is one a pair of between two branch ports of Combining Circuit 12 respectively
It should connect.
By taking radiofrequency signal is from phase-shift network side toward the transmission of 25 direction of aerial array as an example, when three tunnel radiofrequency signals pass through respectively
It after crossing each phase-shift network, is exported respectively from three branch ports of Combining Circuit 12, is respectively transmitted to the of the first power splitter 182
The first port of Single port, the first port of the first electric bridge 183 and the second electric bridge 184.Pass through first the 182, first electricity of power splitter
After bridge 183 and the second electric bridge 184, four tunnel radiofrequency signals are obtained.The letter of radio frequency all the way exported by the third port of the first electric bridge 183
Number by the first fixed phase shifter 187, it is transmitted to the first port of third electric bridge 185.The 4th port by the first electric bridge 183 is defeated
Radiofrequency signal all the way out is directly transferred to the first port of the 4th electric bridge 186.
The radiofrequency signal all the way exported by the third port of the second electric bridge 184 is transmitted to by the second fixed phase shifter 188
The second port of 4th electric bridge 186.Third is directly transferred to by the radiofrequency signal all the way that the 4th port of the second electric bridge 184 exports
The second port of electric bridge 185.Finally, passing through the third port of third electric bridge 185, the third port of the 4th electric bridge 186, third electricity
Four road signals of the 4th port of bridge 185 and the output of the 4th port of the 4th electric bridge 186, the phase difference between adjacent two paths of signals
It is 135 degree.It should be noted that above-mentioned input and output are and the not exclusive restrictions according to for signal transmission direction
The signal transmission direction of second butler matrix 18.The first butler matrix 16 similarly understands below.
By the second above-mentioned butler matrix 18, the phase by signal can be effectively adjusted, to change corresponding wave
The direction of beam, it is ensured that the convergent reliable realization of beam position.
In one embodiment, the first electric bridge 183, the second electric bridge 184, third electric bridge 185 and the 4th electric bridge 186 are 90
Spend electric bridge.First fixed phase shifter 187 and the second fixed phase shifter 188 are negative 45 degree of phase-shifters.
It is appreciated that above-mentioned each first electric bridge 183, the second electric bridge 184, third electric bridge 185 and the 4th electric bridge 186
To be 90 degree of traditional electric bridges of this field；First fixed phase shifter 187 and the second fixed phase shifter 188 may each be this field biography
Minus 45 degree of phase-shifters of system.By above-mentioned networking connection type, so as to by realize the second butler matrix 18 each the
Phase difference between Two-port netwerk is 135 degree.The concrete model of 90 degree of electric bridges and minus 45 degree of phase-shifters can according to the design needs, example
Such as cost, power consumption is selected, as long as can be realized required phase difference output.
Referring to Fig. 3, in one embodiment, the first butler matrix 16 include the 5th electric bridge 161, the 6th electric bridge 162,
7th electric bridge 163, the second power splitter 164, third fixed phase shifter 165 and the 4th fixed phase shifter 166.5th electric bridge 161
The first port of first port and second port and the second power splitter 164 is separately connected each branch end of Combining Circuit 12
Mouthful.The third port of 5th electric bridge 161 connects the first port of the 6th electric bridge 162.The 4th port connection the of 5th electric bridge 161
The first port of seven electric bridges 163.The second port of second power splitter 164 connects the second port of the 6th electric bridge 162.Second function point
The third port of device 164 connects the second port of the 7th electric bridge 163.The third port of 6th electric bridge 162 connects third stationary phase
Move the first port of device 165.The third port of 7th electric bridge 163 connects the first port of the 4th fixed phase shifter 166.6th electricity
4th port of bridge 162, the second port of third fixed phase shifter 165, the 4th port of the 7th electric bridge 163 and the 4th stationary phase
The second port for moving device 166 is separately connected each second port of filtering isolation circuit 14.
It is appreciated that second power splitter 164 can be conventional three in this field for the first above-mentioned butler matrix 16
Port power divider extends for realizing the distribution of signal power.Each electric bridge and each fixed phase shifter are respectively configured to provide different letters
The phase adjustment of number phase, to adjust the phase by signal, to realize that the 4th port of the 6th electric bridge 162, third are fixed
The second port of phase-shifter 165, the 7th electric bridge 163 the 4th port and the second port of the 4th fixed phase shifter 166 between
Output phase is 90 degree.Such as it is solid by the 4th port of the 6th electric bridge 162, second port, the third of the 4th fixed phase shifter 166
The port for determining the second port of phase-shifter 165 and the 4th port of the 7th electric bridge 163 puts in order, and the 4th of the 6th electric bridge 162 the
Port output phase is 0 degree, and the second port output phase of the 4th fixed phase shifter 166 is 90 degree, third fixed phase shifter 165
Second port output phase be 180 degree, the 4th port output phase of the 7th electric bridge 163 is 270 degree；Alternatively, the 6th electric bridge
162 the 4th port output phase is 270 degree, and the second port output phase of the 4th fixed phase shifter 166 is 180 degree, third
The second port output phase of fixed phase shifter 165 is 90 degree, and the 4th port output phase of the 7th electric bridge 163 is 0 degree.5th
The first port and second port of electric bridge 161 and the first port of the second power splitter 164 respectively with Combining Circuit 12 in addition
It connects one to one between three branch ports.
By taking radiofrequency signal is from phase-shift network side toward the transmission of 25 direction of aerial array as an example, when three tunnel radiofrequency signals pass through respectively
After crossing each phase-shift network, respectively from the other three branch port of Combining Circuit 12, it is transferred to the first port of the 5th electric bridge 161
And the first port of second port and the second power splitter 164.Three tunnel radiofrequency signals are by the 5th electric bridge 161 and the second function point
After device 164, four tunnel radiofrequency signals are formed, wherein two-way is respectively transmitted to the 6th electric bridge 162, and another two-way transmission is respectively transmitted to the
Seven electric bridges 163.Two-way output is still corresponded to by the two-way radiofrequency signal of the 6th electric bridge 162, passes through third fixed phase shifter all the way
165 outputs, another way directly export；Two-way output is also still corresponded to by the two-way radiofrequency signal of the 7th electric bridge 163, is passed through all the way
The output of 4th fixed phase shifter 166, another way directly export.
By the first above-mentioned butler matrix 16, can effectively realize direct by the 4th port of the 6th electric bridge 162
Between the signal of output, and the signal of the second port output by the 4th fixed phase shifter 166, phase difference is 90 degree.Pass through
The signal of the second port output of 4th fixed phase shifter 166 is exported with the second port by third fixed phase shifter 165
Between signal, phase difference is also 90 degree.The signal exported by the second port of third fixed phase shifter 165, with the 7th electric bridge
Between the signal that 163 the 4th port directly exports, phase difference is also 90 degree.To change the direction of respective beam, it is ensured that wave
The convergent reliable realization of Shu Zhixiang.
Referring to Fig. 4, in one embodiment, Combining Circuit 12 includes the first combiner 122,124 and of the second combiner
Third combiner 126.The combining port of first combiner 122 is for connecting the first phase-shift network 21.The conjunction of second combiner 124
Road port is for connecting the second phase-shift network 22.The combining port of third combiner 126 is for connecting third phase-shift network 23.The
First branch port of one combiner 122, the second combiner 124 and third combiner 126, is separately connected the first butler matrix
16 each first port.Second branch port of the first combiner 122, the second combiner 124 and third combiner 126, respectively
Connect each first port of the second butler matrix 18.
It is appreciated that the first combiner 122, the second combiner 124 and third combiner 126 may each be but are not limited to this
The three port combiners on the two-way unification road of field routine, concrete property parameter can be selected according to the application demand of feeding network
It is fixed.By the first combiner 122, the second combiner 124 and third combiner 126, may be implemented from the first butler matrix
16 and second butler matrix 18 signal combining, or moved from the first phase-shift network 21, the second phase-shift network 22 and third
The signal branch of phase network 23, so that it is guaranteed that the transmission of three wave beams.
In one embodiment, as shown in figure 4, filtering isolation circuit 14 includes at least three duplexers 142.Each duplexer
142 each second port is separately connected each second port of the first butler matrix 16.Each third port of each duplexer 142 point
Each second port of the second butler matrix 18 is not connected.
It is appreciated that above-mentioned filtering isolation circuit 14 can be made of at least three duplexers 142, each duplexer 142
It may each be the duplexer 142 of this field routine, specific characterisitic parameter can be selected according to the application demand of feeding network.Respectively
Duplexer 142 can be identical duplexer 142, is also possible to characterisitic parameter and port is identical and duplex that internal structure is different
Device 142, as long as being capable of providing required signal transfer management function.When the quantity of duplexer 142 is three, first bar
Each second port of Teller matrix 16 and the second butler matrix 18 difference, second port and third end with each duplexer 142
After mouthful being connected, the part second port of redundancy (such as the first butler matrix 16 and each redundancy of the second butler matrix 18 one the
Two-port netwerk) it can be hanging.
Any duplexer 142 includes a first port, a second port and a third port.Any duplexer
For 142 second port compared with third port, the working frequency of second port is lower than third port.For example, any duplexer 142
Through first port after the reception signal of aerial array 25, pass through second port (low frequency port) and third port (high frequency port)
It is two paths of signals that signal frequency division, which will be received, is all the way low frequency signal, is exported by the second port of duplexer 142 to the first Butler
Matrix 16；Another way is high-frequency signal, is exported by the third port of duplexer 142 to the second butler matrix 18.
It is realized between aerial array 25 and the first butler matrix 16, the second butler matrix 18 by each duplexer 142
Connection, so as to effectively realize the higher sub-band signals of working frequency by the second butler matrix 18, and the frequency that works
The lower sub-band signals of rate achieve the purpose that 100 working frequency range of feeding network is divided by the first butler matrix 16.It needs
Illustrate, in above-mentioned Fig. 1 and Fig. 4, thus it is shown that two of them application example, and in non-limiting aerial array oscillator tool
Body columns be four column, combiner quantity be four.In application scenes, the specific columns of oscillator can also in aerial array
To be three column, the quantity of duplexer can be three at this time, and specific columns can be determined according to different antenna models；Duplexer
Quantity be also possible to four each or four or more, can be determined according to the columns of oscillator in aerial array.
In one embodiment, the 5th electric bridge 161, the 6th electric bridge 162 and the 7th electric bridge 163 are 90 degree of electric bridges.Third
Fixed phase shifter 165 and the 4th fixed phase shifter 166 are negative 90 degree of phase-shifters.
It is appreciated that above-mentioned the 5th electric bridge 161, the 6th electric bridge 162 and the 7th electric bridge 163 also may each be this field biography
90 degree of electric bridges of system；Third fixed phase shifter 165 and the 4th fixed phase shifter 166 may each be the traditional minus 90 degree of phases in this field
Move device.By above-mentioned networking connection type, so as between each second port for realizing the first butler matrix 16
Phase difference is 135 degree.The concrete model of 90 degree of electric bridges and minus 90 degree of phase-shifters can according to the design needs, such as cost, power consumption
It is equal to be selected, as long as can be realized required phase difference output.
In one embodiment, a kind of three beam antennas are also provided, including aerial array 25, the first phase-shift network 21, the
Two phase-shift networks 22 and third phase-shift network 23 and above-mentioned feeding network 100.
By applying above-mentioned feeding network 100, ultra wide band working frequency range used in three beam antennas can be divided
For two narrow frequencies, the signal of the lower frequency sub-band of frequency is made to pass through the small difference Wave beam forming net that the first butler matrix 16 provides
Network makes the signal of the higher frequency sub-band of frequency pass through the big difference beam-forming network that the second butler matrix 18 provides.It realizes
When not changing the fixed array pitch of aerial array 25, with different difference beam-forming networks, so that height
The beam position of frequency range is more concentrated, and is solved the problems, such as the beam position of three beam antennas with frequency divergence, is effectively improved three
The covering performance of beam antenna.
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not in above-described embodiment
Each technical characteristic it is all possible combination be all described, as long as however, there is no contradiction in the combination of these technical features, all
It is considered to be the range of this specification record.
Above embodiments only express the several embodiments of the application, describe it is more specific and detailed, but can not be because
This and be construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art, not
Under the premise of being detached from the application design, several modifications and improvements can be also made, the protection scope of the application is belonged to.Therefore, originally
Apply for a patent that the scope of protection shall be subject to the appended claims.
Claims (10)
1. a kind of feeding network, which is characterized in that including Combining Circuit, filtering isolation circuit, the first butler matrix and second
Butler matrix, each combining port of the Combining Circuit are respectively used to the first phase-shift network of connection, the second phase-shift network and the
Three phase-shift networks, each first port of the filtering isolation circuit is for connecting aerial array；Wherein, the first Butler square
The working frequency and output difference of battle array, the working frequency and output difference of respectively lower than described second butler matrix；
Each first port of each first port of first butler matrix and second butler matrix, is separately connected institute
State each branch port of Combining Circuit；Each second port of first butler matrix is sequentially connected the filtering isolation circuit
Each second port, each second port of second butler matrix be sequentially connected it is described filtering isolation circuit each third end
Mouthful.
2. feeding network according to claim 1, which is characterized in that each second port of second butler matrix
In, the phase difference between two neighboring second port is the first setting difference.
3. feeding network according to claim 2, which is characterized in that second butler matrix includes the first function point
Device, the first electric bridge, the second electric bridge, third electric bridge, the 4th electric bridge, the first fixed phase shifter and the second fixed phase shifter；
The first port of first power splitter and the first port of first electric bridge and second electric bridge are separately connected
Each branch port of the Combining Circuit；The second port of first power splitter connects the second port of first electric bridge,
The third port of first power splitter connects the second port of second electric bridge；
The third port of first electric bridge connects the first port of the third electric bridge by first fixed phase shifter,
4th port of first electric bridge connects the first port of the 4th electric bridge；
The third port of second electric bridge connects the second port of the 4th electric bridge by second fixed phase shifter,
4th port of second electric bridge connects the second port of the third electric bridge；
The third port and the 4th port difference of the third port of the third electric bridge and the 4th port and the 4th electric bridge
Connect each third port of the filtering isolation circuit.
4. feeding network according to claim 1, which is characterized in that each second port of first butler matrix
In, the phase difference between two neighboring second port is the second setting difference.
5. feeding network according to claim 4, which is characterized in that first butler matrix include the 5th electric bridge,
6th electric bridge, the 7th electric bridge, the second power splitter, third fixed phase shifter and the 4th fixed phase shifter, the of the 5th electric bridge
The first port of Single port and second port and second power splitter is separately connected each branch end of the Combining Circuit
Mouthful；
The third port of 5th electric bridge connects the first port of the 6th electric bridge, and the 4th port of the 5th electric bridge connects
Connect the first port of the 7th electric bridge；The second port of second power splitter connects the second port of the 6th electric bridge,
The third port of second power splitter connects the second port of the 7th electric bridge；
The first port of the third port connection third fixed phase shifter of 6th electric bridge, the third port of the 7th electric bridge
Connect the first port of the 4th fixed phase shifter；
4th port of the 6th electric bridge, the second port of the third fixed phase shifter, the 7th electric bridge the 4th end
The second port of mouth and the 4th fixed phase shifter is separately connected each second port of the filtering isolation circuit.
6. feeding network according to any one of claims 1 to 5, which is characterized in that the Combining Circuit includes the first conjunction
Road device, the second combiner and third combiner, the combining port of first combiner are used to connect first phase-shift network,
For connecting second phase-shift network, the combining port of the third combiner is used for for the combining port of second combiner
Connect the third phase-shift network；
First branch port of first combiner, second combiner and the third combiner is separately connected described
Each first port of first butler matrix；The of first combiner, second combiner and the third combiner
Two branch ports are separately connected each first port of second butler matrix.
7. feeding network according to claim 6, which is characterized in that the filtering isolation circuit includes at least three duplexs
Device, each second port of each duplexer are separately connected each second port of first butler matrix, each duplex
Each third port of device is separately connected each second port of second butler matrix.
8. feeding network according to claim 3, which is characterized in that first electric bridge, second electric bridge, described
Three electric bridges and the 4th electric bridge are 90 degree of electric bridges, and first fixed phase shifter and second fixed phase shifter are negative
45 degree of phase-shifters.
9. feeding network according to claim 5, which is characterized in that the 5th electric bridge, the 6th electric bridge and the 7th electric bridge
It is 90 degree of electric bridges, the third fixed phase shifter and the 4th fixed phase shifter are negative 90 degree of phase-shifters.
10. a kind of three beam antennas, which is characterized in that including aerial array, the first phase-shift network, the second phase-shift network and third
Phase-shift network and the described in any item feeding networks of claim 1 to 9.
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