CN206211028U - A kind of compact symmetric feeds network - Google Patents
A kind of compact symmetric feeds network Download PDFInfo
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- CN206211028U CN206211028U CN201621136191.5U CN201621136191U CN206211028U CN 206211028 U CN206211028 U CN 206211028U CN 201621136191 U CN201621136191 U CN 201621136191U CN 206211028 U CN206211028 U CN 206211028U
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Abstract
The utility model is related to a kind of compact symmetric feeds network, including：Insulation medium board, positioned at the positive microstrip feed network of insulation medium board, the metal base plate positioned at dielectric back；The microstrip feed network includes three power splitters：First power splitter, the second power splitter and the 3rd power splitter and left microstrip line, right microstrip line, phase shift connection microstrip line, phase shift microstrip line；It is characterized in that：Three power splitters, phase shift microstrip line are shaped as hexagon, and three power splitters and phase shift microstrip line be symmetrically distributed on microstrip feed network in geometric center.Feeding network layout has the characteristics of simple structure, compact, miniaturization, and can reduce the coupling between microstrip line, it is ensured that output end signal amplitude is consistent, is widely portable in the circular polarized antenna of small-size high-gain.
Description
Technical field
The utility model relates to one kind be used for antenna technical field, more particularly to RFID applied technical fields one kind
Compact symmetric feeds network.
Background technology
RFID (Radio Frequency Identification) --- REID, is a kind of logical using radio frequency
Reliable existing non-contact automatic identification technology.With continuing to develop and ripe for RFID core technologies, application field increasingly expands
Greatly, more and more applied including military affairs, aviation, warehouse logisticses, commodity retail, industrial manufacture, asset management, traffic
The different field such as transport, anti-counterfeit anti-theft, bathroom.The hardware components of radio-frequency recognition system are general by electronic tag, reader and
Antenna is constituted.In order to ensure the arbitrariness that electronic tag is put, aerial radiation circular polarisation electromagnetic wave is typically required.Antenna is justified
The implementation of polarization typically has three kinds：Single feedback method, double-fed method and multivariate method, these modes all have corresponding electric and structure
Advantage and disadvantage.
The advantage of wherein multivariate method is that antenna unit structure is relatively simple, easily realizes circular polarisation, and axle ratio is relatively easy to
Control, broader bandwidth.Wherein, realization is a key technology of antenna to 4, the broadband circular polarisation feeding network of antenna.In order to
The output port quartering is realized, and phase realizes delayed 90 ° successively of characteristic, it usually needs a main power splitter, two are set
Secondary power splitter and some microstrip lines are realizing phase shift function.When feeding network is designed, it is necessary to avoid between microstrip line
Close coupling in order to avoid there is serious decay in signal, while also to avoid the coupling between antenna and feeder line to ensure aerial radiation
The uniformity of energy.Common problem is at present：Feeding network is excessively complicated, and wiring bending is excessive, there is the decay of signal
It is serious with coupling phenomenon, it is difficult to ensure the uniformity of the amplitude at each antenna element feed.
In the prior art of retrieval, number of patent application 201120534603.1, patent name is 4 circular polarisation feeding networks,
Patent publication No. CN 202564548U, the feeding network is connected and is connected in parallel using power splitter and wideband phase shift device, wherein,
The microstrip line cabling of 90 ° of broad-band phase shifters and 180 ° of phase shifters is too close to, and easily produces close coupling so that signal is susceptible to
Serious decay.On the other hand, whole feeding network is confined to disc of the diameter no more than 180mm so that the feeding network is accounted for
It is larger with space, against the trend of current antenna miniaturization design.
Therefore, when design is based on complex array circular polarized antenna, it is necessary to first micro- on rational design feeding network
Band line layout.
The content of the invention
The purpose of this utility model is the defect a kind of compact symmetric feeds network of offer for prior art, the feedback
Electric network layout has the features such as simple structure, compact, miniaturization, and can reduce the coupling between microstrip line, it is ensured that output
End signal amplitude is consistent.
To achieve the above object, the utility model uses following technical scheme：
A kind of compact symmetric feeds network, including：Insulation medium board, positioned at the positive microstrip-fed net of insulation medium board
Network, the metal base plate positioned at dielectric back；
The microstrip feed network includes three power splitters：First power splitter, the second power splitter and the 3rd power splitter and a left side
Microstrip line, right microstrip line, phase shift connection microstrip line, phase shift microstrip line；First power splitter, one output end is by right micro-strip
Line is connected to the input of the second power splitter；Another output end of first power splitter passes sequentially through phase shift connection micro-strip
Line, phase shift microstrip line, left microstrip line are connected in series to the input of the 3rd power splitter；
It is characterized in that：Three power splitters, phase shift microstrip line are shaped as hexagon, three power splitters and shifting
Phase microstrip line is symmetrically distributed on microstrip feed network in geometric center.
As a further improvement, the hexagon of the power splitter, phase shift microstrip line is by the five of a side long and equal length
Bar short side is constituted, wherein, any two short sides angle is 135 °, and side long is 90 ° with the angle of short side.
As a further improvement, the power splitter, phase shift microstrip line gather distribution and are in geometric center is symmetrical to center
The short side of hexagon is inwardly gathered；The hexagon side long of the first power splitter is horizontal, the second power splitter, the length of the 3rd power splitter
While for vertical configuration is distributed, the side long of phase shift microstrip line is horizontal distribution.
As a further improvement, the phase shift connection microstrip line microstrip line, phase shift microstrip line 180 ° of phase shifters in series,
The equal length of left microstrip line and right microstrip line is centrosymmetric distribution.
As a further improvement, the microstrip feed network also includes a main microstrip line, a power feed inputs, four feeds
Output end and four output link microstrip lines；The power feed inputs are connected to the input of the first power splitter by main microstrip line
End；Four feeds output end is connected to the second power splitter and the 3rd power splitter by four output link microstrip lines respectively
Output end；Four feeds output end along being distributed clockwise or counterclockwise, the phase of four feeds output end phase successively
Differ from 90 °.
As a further improvement, etching a line of rabbet joint on metal base plate, the line of rabbet joint is located at the input end of the second power splitter.
As a further improvement, each in described each power splitter set an isolation resistance, its resistance value is 100 ohm.
As a further improvement, described each power splitter is microstrip power divider, the output that the power splitter passes through power splitter
Energy is halved at end, and the output end of the power splitter is connected by microstrip line with the input of next stage power splitter.
As a further improvement, the insulation medium board is polyfluortetraethylene plate or FR-4 insulation boards, the dielectric
The side length of plate is square no more than 100mm.
As a further improvement, the metal base plate is copper clad layers, it is connected to ground.
Compared with prior art, a kind of compact symmetric feeds network that the utility model is provided, can not only be by input
Signal be converted into four tunnels delayed 90 ° of signal successively, and have further the advantage that：
1. the microstrip line that feeding network is used bends less and bending place and is non-acute angle connection, wherein a microstrip line and work(
Point device is all designed into hexagonal shape, and short side inwardly gathers shape so that feeding network integral layout it is compact, reasonable, symmetrical and
Miniaturization, it is ensured that the Miniaturization Design of feeding network and the weak coupling characteristic of peripheral parts；
2. whole microstrip feed network includes that power splitter and microstrip line are all in symmetric form, even if being also identical in the presence of coupling
Coupling, reduce difference each other, it is to avoid feeding network and antenna occur strong jamming or inconsistent interference, it is ensured that
The current amplitude of output end signal is consistent；
3. it is conscious to pass through right wing signal by etching a line of rabbet joint on the metallic plate positioned at the insulation medium board back side
The line of rabbet joint can reveal a part of signal and go out, and actively reveal electromagnetic energy, and four electric current width of output end are further effectively ensured
Degree uniformity.
Brief description of the drawings
Fig. 1 is the overall schematic of the utility model embodiment.
Fig. 2 is the structural representation of the microstrip feed network in the utility model embodiment.
Fig. 3 is the hexagonal structure schematic shapes of the power splitter in the utility model embodiment.
Fig. 4 is the enlarged drawing in the line of rabbet joint A portions in the utility model embodiment.
Reference：
The metal base plate 3 of 1 microstrip feed network of insulation medium board 2
The power splitter 24 of 22 first power splitter of power feed inputs 23 second
The feed feed output end 27 of output end 26 second of 3rd power splitter 25 first
The 3rd feed feed insulaion resistance 10 of output end 29 of output end 28 the 4th
The main microstrip line 201 of 30 bending part microstrip line of the line of rabbet joint 40
The phase shift of right microstrip line 202 connects the phase shift microstrip line 2032 of microstrip line 2031
Left microstrip line 204
The first output link output link microstrip line 206 of microstrip line 205 second
The 3rd output link output link microstrip line 208 of microstrip line 207 the 4th
Specific embodiment
The technical solution of the utility model is described in further detail with specific embodiment below in conjunction with accompanying drawing.
As shown in Fig. 1 ~ 3, a kind of compact symmetric feeds network, including：Insulation medium board 1, positioned at insulation medium board just
The microstrip feed network 2 in face, the metal base plate 3 positioned at dielectric back；The microstrip feed network 2 includes three work(point
Device：First power splitter 23, the second power splitter 24 and the 3rd power splitter 25 and left microstrip line 204, the connection of right microstrip line 202, phase shift
Microstrip line 2031, phase shift microstrip line 2032；First power splitter, 23 1 output ends are connected to second by right microstrip line 202
The input of power splitter；It is micro- that another output end of first power splitter passes sequentially through phase shift connection microstrip line 2031, phase shift
The input of the 3rd power splitter 24 is connected in series to line 2032, left microstrip line 204；
Three power splitters, phase shift microstrip line 2032 are shaped as hexagon, three power splitters and phase shift micro-strip
Line 2032 is symmetrically distributed on microstrip feed network 2 in geometric center.The power splitter 23,24,25, phase shift microstrip line 2032
Hexagon is made up of five short sides of a side long and equal length, wherein, any two short sides angle is 135 °, side long and short side
Angle be 90 °.
The power splitter 23,24,25, phase shift microstrip line 2032 symmetrically gather distribution and are six sides in geometric center to center
The short side of shape is inwardly gathered；The hexagon side long of the first power splitter 23 for horizontal, the second power splitter 24, the 3rd power splitter 25
Side long is distributed for vertical configuration, and the side long of phase shift microstrip line 2032 is horizontal distribution.
The phase shift connects microstrip line microstrip line 2031, phase shift microstrip line 2032 in series 180 ° of phase shifters, left micro-strip
The equal length of line 204 and right microstrip line 202 is centrosymmetric distribution.
The microstrip feed network also include a main microstrip line 201, the feed of power feed inputs 22, four output ends 26,
27th, 28,29 and four output link microstrip lines 205,206,207,208；The power feed inputs 22 are connected by main microstrip line 201
It is connected to the input of the first power splitter 23；Four feeds output end 26,27,28,29 is micro- by four output links respectively
The output end of the second power splitter 24 and the 3rd power splitter 25 is connected to line 205,206,207,208；Four feeds output
Along being distributed clockwise or counterclockwise, the phase of four feeds output end 26,27,28,29 is differed successively at end 26,27,28,29
90°。
During optimal design, the length of arrangement wire of each power splitter hexagon is equal to electromagnetic wave half wavelengths long in media as well, moves
The microstrip line total length of microstrip line 2031 and phase shift microstrip line 2032 of being connected also is half wavelengths long.This hexagonal structure is designed
On the one hand cause that the microstrip line bending of microstrip feed network 2 is reduced, on the other hand so that the microstrip line of microstrip feed network 2 is all
It is the inwardly compact distribution of hexagon short side, and is symmetrical, it is ensured that the miniaturization of Antenna Design.
The insulation medium board 1 is polyfluortetraethylene plate or FR-4 insulation boards, because the compact layout of microstrip line hexagon sets
Meter, the big I of insulation medium board 1 accomplishes that side length is square no more than 100mm.
The metal base plate 3 is copper clad layers, is connected to ground.Metal base plate 3 is all to spread copper at the back side of insulation medium board 1
Formed, and be provided with feed pad, enable to microstrip feed network 2 in the transmission characteristic of co-planar waveguide, signal can be increased
Stability.
Specifically, each described power splitter is halved energy by power etc. point port, each power etc. point port
It is connected with the input of next stage power splitter by microstrip line 20.The distance between each power splitter has taken into full account micro-strip
Coupling between line so that each port forms same or similar coupling form, can so ensure simple structure
On the premise of compact, the uniformity of the signal amplitude of the output port of antenna.
Each in each power splitter to set an isolation resistance 10, its resistance value is 100 ohm.Branch port can effectively be hindered
Influence of the reflected signal to other ports, improves the stability of power splitter, and rational microstrip line distribution and length are set
Also ensure that the integrally-built miniaturization of antenna makes feeder structure compacter.
Initial signal is linked into microstrip feed network 2 by power feed inputs 22, and first is connected to by main microstrip line 201
Power splitter 23.One output end of the first power splitter 23 is connected to the input of the second power splitter 24 by right microstrip line 202；Separately
One output end connects microstrip line 2031, phase shift microstrip line 2032 and left microstrip line 204 and is connected to the 3rd power splitter by phase shift
25 input；
Phase shift connects microstrip line 2031 and phase shift microstrip line 2032 is connected into one 180 ° of phase shifters.Left microstrip line 204 and the right side
The equal length of microstrip line 202.First power splitter 23 is connected to the micro-strip line length that the 3rd power splitter 25 walked and is more than the first work(
Device 23 is divided to be connected to the micro-strip line length that the second power splitter 24 is walked, unnecessary length scale is the phase shift connection He of microstrip line 2031
The summation of phase shift microstrip line 2032.So the letter of the input of the signal of the input of the second power splitter 24 and the 3rd power splitter 25
Number phase differs 180 °.
One output end of the second power splitter 24 is connected to microstrip feed network 2 by the first output link microstrip line 205
The first feed output end 26, the first feed signal code for exporting of output end 26 is set as 0 °；Another output end passes through
Second output link microstrip line 206 is connected to the second feed output end 27 of microstrip feed network 2, can be exported by regulation second
Linking the microstrip line bending part 40 of microstrip line 206 makes the signal of the signal than the first feed output end 26 of the second feed output end 27
Delayed 90 ° of phase differences, i.e., the signal code phase of the second feed output of output end 27 is -90 °.
One output end of the 3rd power splitter 25 is connected to microstrip feed network 2 by the 3rd output link microstrip line 207
The 3rd feed output end 28；Another output end is connected to microstrip feed network 2 by the 4th output link microstrip line 208
4th feed output end 29, can make the 4th feed defeated by the microstrip line bending part 40 of the output link microstrip line 208 of regulation the 4th
Go out the signal lag 90 ° phase differences of the signal than the first feed output end 28 at end 29.
Wherein, the length of the first output link microstrip line 205 exports that to link the length of microstrip line 207 identical with the 3rd, and second
The length of output link microstrip line 206 is identical with the length that the 4th output links microstrip line 208.First feed output end 26 and the
The phase difference of three feed output ends 28 is equal to the input of the second power splitter 24 and the signal phase of the input of the 3rd power splitter 25
Potential difference is 180 °.So, the signal code phase of the 3rd feed output of output end 28 is -180 °, similarly, the 4th feed output end
The signal code phase of 29 outputs is -270 °.
Further optimize, as shown in figure 4, etch a line of rabbet joint 30 on the metal base plate 3, the line of rabbet joint 30 is located at the
At the input 241 of two power splitters 24.The big I of the line of rabbet joint 30 is calculated by software emulation, or the method for experiment.Groove
Seam is preferably rectangle, the length in the direction flowed to along signal, preferably 2 ~ 4mm of scope, 3mm.The length of vertical signal flow direction is big
It is small to be not required.The effect for setting up the line of rabbet joint 30 can be that the signal amplitude for making right side reduces.Its reason is, normally due to medium
Be constantly present loss, the signal in left side due to 180 ° of phase difference microstrip line lengths, therefore, signal amplitude exist decay so that enter
The signal amplitude entered at the second power splitter 4 is bigger than normal.In order to ensure that four signal amplitudes of output port are consistent, by opening up a groove
Seam 30 so that a signal leakage part for flow direction right side feed output end 26,27 is to reach four signal amplitudes of output end
Unanimously.
Finally, first to fourth feed output end 26 of microstrip feed network 2,27,28,29 exportable range values are equal,
Phase angle is respectively 0 °, -90 °, -180 °, the road signals of -270 ° tetra-.
Whole microstrip feed network is by power splitter and the hexagonal structure layout of microstrip line, and one side microstrip line is curved
Folding is less, and hexagon short side inwardly gathers the layout that shape design greatly reduces microstrip feed network, is conducive to the small-sized of antenna
Change；On the other hand, the cabling of microstrip line is laid out and causes that the coupling between antenna and microstrip line is unanimous on the whole, interferes consistent
Property, while the conscious increase line of rabbet joint on insulating base, is provided to ensure that the signal amplitude of four ports is consistent.This is compact
The layout designs of symmetric feeds network are conducive to the Miniaturization Design of circular polarized antenna.
Embodiment described above is only a preferred embodiment of the present utility model, is not used to limit this practicality newly
Type, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvements done etc. should be included in this
Within the scope of utility model protection.
Claims (10)
1. a kind of compact symmetric feeds network, including：Insulation medium board, positioned at the positive microstrip-fed net of insulation medium board
Network, the metal base plate positioned at dielectric back；
The microstrip feed network includes three power splitters：First power splitter, the second power splitter and the 3rd power splitter and left micro-strip
Line, right microstrip line, phase shift connection microstrip line, phase shift microstrip line；First power splitter, one output end is connected by right microstrip line
It is connected to the input of the second power splitter；Another output end of first power splitter passes sequentially through phase shift connection microstrip line, moves
Phase microstrip line, left microstrip line are connected in series to the input of the 3rd power splitter；
It is characterized in that：Three power splitters, phase shift microstrip line are shaped as hexagon, and three power splitters and phase shift be micro-
Band line is symmetrically distributed on microstrip feed network in geometric center.
2. a kind of compact symmetric feeds network according to claim 1, it is characterised in that the power splitter, phase shift are micro-
Hexagon with line is made up of five short sides of a side long and equal length, wherein, any two short sides angle is 135 °, side long
It it is 90 ° with the angle of short side.
3. a kind of compact symmetric feeds network according to claim 1 and 2, it is characterised in that the power splitter, phase shift
Microstrip line gathers distribution and for the short side of hexagon is inwardly gathered in geometric center is symmetrical to center；The hexagon of the first power splitter
Side long is horizontal, and the second power splitter, the side long of the 3rd power splitter are vertical configuration distribution, and the side long of phase shift microstrip line is horizontal
Distribution.
4. a kind of compact symmetric feeds network according to claim 1, it is characterised in that the phase shift connects microstrip line
The equal length of microstrip line, phase shift microstrip line 180 ° of phase shifters in series, the left microstrip line and right microstrip line and in center
It is symmetrical.
5. a kind of compact symmetric feeds network according to claim 1 a, it is characterised in that groove is etched on metal base plate
Seam, the line of rabbet joint is located at the input end of the second power splitter.
6. a kind of compact symmetric feeds network according to claim 1, it is characterised in that the microstrip feed network is also
Including a main microstrip line, a power feed inputs, four feed output ends and four output link microstrip lines；The power feed inputs
The input of the first power splitter is connected to by main microstrip line；Four feeds output end is micro- by four output links respectively
The output end of the second power splitter and the 3rd power splitter is connected to line；Four feeds output end edge is divided clockwise or counterclockwise
Cloth, the phase of four feeds output end differs 90 ° successively.
7. a kind of compact symmetric feeds network according to claim 1, it is characterised in that each in described each power splitter
One isolation resistance is set, and its resistance value is 100 ohm.
8. a kind of compact symmetric feeds network according to claim 1, it is characterised in that described each power splitter is micro-
Band power splitter, the power splitter is halved energy by the output end of power splitter, and the output end of the power splitter passes through micro-strip
Line is connected with the input of next stage power splitter.
9. a kind of compact symmetric feeds network according to claim 1, it is characterised in that the insulation medium board can be
Polyfluortetraethylene plate or FR-4 insulation boards, the side length of the insulation medium board are square no more than 100mm.
10. a kind of compact symmetric feeds network according to claim 1, it is characterised in that the metal base plate is to cover
Layers of copper, is connected to ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621136191.5U CN206211028U (en) | 2016-10-19 | 2016-10-19 | A kind of compact symmetric feeds network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621136191.5U CN206211028U (en) | 2016-10-19 | 2016-10-19 | A kind of compact symmetric feeds network |
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| CN206211028U true CN206211028U (en) | 2017-05-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450762A (en) * | 2016-10-19 | 2017-02-22 | 厦门致联科技有限公司 | Compact symmetrical feed network |
| RU2688948C1 (en) * | 2018-06-13 | 2019-05-23 | Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Образования "Новосибирский Государственный Технический Университет" | Power divider |
| CN112366445A (en) * | 2020-10-27 | 2021-02-12 | 东莞市振亮精密科技有限公司 | Power distribution network, 5G antenna module and assembly method of 5G antenna module |
-
2016
- 2016-10-19 CN CN201621136191.5U patent/CN206211028U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450762A (en) * | 2016-10-19 | 2017-02-22 | 厦门致联科技有限公司 | Compact symmetrical feed network |
| RU2688948C1 (en) * | 2018-06-13 | 2019-05-23 | Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Образования "Новосибирский Государственный Технический Университет" | Power divider |
| CN112366445A (en) * | 2020-10-27 | 2021-02-12 | 东莞市振亮精密科技有限公司 | Power distribution network, 5G antenna module and assembly method of 5G antenna module |
| CN112366445B (en) * | 2020-10-27 | 2021-07-27 | 东莞市振亮精密科技有限公司 | Power distribution network, 5G antenna module and assembly method of 5G antenna module |
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