CN108258438A - Double-frequency broadband feeding network - Google Patents
Double-frequency broadband feeding network Download PDFInfo
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- CN108258438A CN108258438A CN201611247063.2A CN201611247063A CN108258438A CN 108258438 A CN108258438 A CN 108258438A CN 201611247063 A CN201611247063 A CN 201611247063A CN 108258438 A CN108258438 A CN 108258438A
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- Prior art keywords
- double
- port
- coupler
- frequency
- frequency coupler
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- Variable-Direction Aerials And Aerial Arrays (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
The present invention discloses a kind of double-frequency broadband feeding network, including coaxial connector, first port, second port, third port, the 4th port, the first double frequency coupler and the second double frequency coupler.The signal wire of coaxial connector connects the input terminal of the first double frequency coupler, and the ground wire of coaxial connector is connected to the input terminal of the second double frequency coupler；The input terminal of the straight-through end connection first port of first double frequency coupler, the input terminal of the coupled end connection second port of the first double frequency coupler, the isolation end connection first resistor of the first double frequency coupler；The straight-through end of second double frequency coupler connects the input terminal of the 4th port, the input terminal of the coupled end connection third port of the second double frequency coupler, the isolation end connection second resistance of the second double frequency coupler.The present invention can realize the miniaturization of feeding network and 90 ° of phase shift is realized between the adjacent port of four output ports, can both realize the dual frequency characteristics of feeding network, can also realize broadband character.
Description
Technical field
The present invention relates to technical field of satellite communication more particularly to a kind of double-frequency broadband feeding networks.
Background technology
In recent years, with satellite navigation, the fast development and extensive use of satellite communication, circular polarized antenna or array antenna
As the headend equipment of these systems, the quality of performance indicator sets satellite communication hand-held terminal and radio frequency identification Card Reader
Standby performance plays an important role.In addition, it is pushed away for the ease of satellite communication terminal and the extensive of radio-frequency recognition system
Wide application, the financial cost and volume size of system are all vital Considerations, the entelechy as wherein important component
Change antenna, under the premise of superior performance index is ensured, it is necessary to have the characteristics of of low cost, compact-sized and compact.
When feeding circular polarized antenna or array antenna, need to be designed feeding network.Due to present communication system
It is required for multifrequency, broadband, miniaturization.And existing feeding network is bulky, is unfavorable for satellite antenna radio-frequency front-end
It is integrated.And it is operated in single frequency point mostly, it is unfavorable for working under multifrequency or broadband condition.
Invention content
The main object of the present invention provides a kind of double-frequency broadband feeding network, it is intended to it is huge to solve existing feeding network volume
Greatly, it is unfavorable for the integrated of satellite antenna radio-frequency front-end, and is operated in single frequency point mostly, is unfavorable in multifrequency or broadband condition
The technical issues of lower work.
To achieve the above object, the present invention provides a kind of double-frequency broadband feeding network, including coaxial connector, first end
Mouth, second port, third port, the 4th port, the first double frequency coupler and the second double frequency coupler, wherein：
The signal wire of coaxial connector is connected to the input terminal of the first double frequency coupler, and the ground wire of coaxial connector is connected to
The input terminal of second double frequency coupler；
The straight-through end of first double frequency coupler is connected to the input terminal of first port, and the coupled end of the first double frequency coupler connects
The input terminal of second port is connected to, the isolation end of the first double frequency coupler is connected to first resistor；
The straight-through end of second double frequency coupler is connected to the input terminal of the 4th port, and the coupled end of the second double frequency coupler connects
The input terminal of third port is connected to, the isolation end of the second double frequency coupler is connected to second resistance；
The first double frequency coupler and the second double frequency coupler are made of 12 section transmission lines, each section transmission line
Electrical length is quarter-wave.
Preferably, the impedance of the coaxial connector, first port, second port, third port and the 4th port is
50Ω。
Preferably, the resistance value of the first resistor and second resistance is 50 Ω.
Preferably, the first double frequency coupler and the second double frequency coupler include four double minor matters impedance matching boxs and
One branch line coupler, four union ends of the branch line coupler are correspondingly connected to four double minor matters impedance matching boxs
On.
Preferably, double minor matters impedance matching boxs include transmission line Z1 and transmission line Z2, the transmission line Z1 and transmission
Line Z2 is concatenated.
Preferably, the impedance of the transmission line Z1 is 85 Ω, and the impedance of the transmission line Z2 is 62 Ω.
Preferably, the branch line coupler include two section transmission line Z3 and two section transmission line Z4, the transmission line Z3 and
Transmission line Z4 is alternately concatenated into cyclic structure.
Preferably, the impedance of the transmission line Z3 is 24 Ω, and the impedance of the transmission line Z4 is 33 Ω.
Compared to the prior art, double-frequency broadband feeding network of the present invention uses above-mentioned technical proposal, has reached as follows
Technique effect：Two double frequency couplers are fed with ground wire using the signal wire of coaxial connector, in four output ports
Adjacent port between realize 90 ° of phase shift.By the Reasonable Arrangement to coupler, the miniaturization of feeding network is realized.It in addition, can
Dual frequency characteristics are realized to adjust the impedance matching of double frequency coupler, if two frequency bins suffer closer, can realize broadband spy
Property.
Description of the drawings
Fig. 1 is the electrical block diagram of double-frequency broadband feeding network preferred embodiment of the present invention；
Fig. 2 is the S parameter simulation result schematic diagram of double-frequency broadband feeding network of the present invention；
Fig. 3 is the phase difference simulation result schematic diagram of double-frequency broadband feeding network of the present invention.
The object of the invention is realized, functional characteristics and advantage will together will join in specific embodiment part in conjunction with the embodiments
It is described further according to attached drawing.
Specific embodiment
The technological means and effect taken to reach above-mentioned purpose further to illustrate the present invention, below in conjunction with attached drawing
And preferred embodiment, specific embodiment, structure, feature and its effect of the present invention are described in detail.It should be appreciated that this
Locate described specific embodiment to be only used to explain the present invention, be not intended to limit the present invention.
With reference to shown in Fig. 1, Fig. 1 is the electrical block diagram of double-frequency broadband feeding network preferred embodiment of the present invention.
In the present embodiment, the double-frequency broadband feeding network is integrated on pcb board, including coaxial connector P0, first port P1,
Two-port netwerk P2, third port P3, the 4th port P4, the first double frequency coupler 1 and the second double frequency coupler 2.It is described coaxially connected
Device P0 is the coaxial connector that an impedance value is 50 Ω (ohm), the coaxial feed as circular polarized antenna or array antenna
Portion.The signal wire of coaxial connector P0 is connected to the input terminal of the first double frequency coupler 1, and the ground wire of coaxial connector P0 is connected to
The input terminal of second double frequency coupler 2.Wherein：The straight-through end of first double frequency coupler 1 is connected to first port P1, the first double frequency
The coupled end of coupler 1 is connected to second port P2, the isolation end of the first double frequency coupler 1 is connected to first resistor R1.Second
The straight-through end of double frequency coupler 2 is connected to the 4th port P4, the coupled end of the second double frequency coupler 2 is connected to third port P3,
The isolation end of second double frequency coupler 2 is connected to second resistance R2.The resistance value of the first resistor R1 and second resistance R2 is equal
Preferably 50 Ω, the coaxial connector P0, coaxial connector P0, first port P1, second port P2, third port P3 and
The impedance of four port P4 is both preferably 50 Ω.
The first double frequency coupler 1 and the second double frequency coupler 2 include four double minor matters impedance matching boxs 11 and one
A branch line coupler 12, four union ends of the branch line coupler 12 are correspondingly connected to four double minor matters impedance matching boxs
On 11, i.e., a union end of branch line coupler 12 connects a double minor matters impedance matching box 11.Each double minor matters impedance
Adaptation 11 includes a section transmission line Z1 and one and saves transmission line Z2, and wherein transmission line Z1 is concatenated with transmission line Z2.The branch line
Coupler 12 includes two section transmission line Z3 and two section transmission line Z4, the two section transmission line Z3 and two section transmission line Z4 are alternately concatenated
Circlewise structure.In the present embodiment, the impedance of the transmission line Z1 is preferably 85 Ω, and the impedance of transmission line Z2 is preferably 62
The impedance that the impedance of Ω, transmission line Z3 are preferably 24 Ω and transmission line Z4 is preferably 33 Ω.The transmission line Z1, transmission line
Other suitable impedance values can also be used in the impedance of Z2, transmission line Z3 and transmission line Z4.
In the present embodiment, the first double frequency coupler 1 and the second double frequency coupler 2 are by 12 section transmission line groups
Into, the electrical length of each section transmission line is 1/4 wavelength, i.e. transmission line Z1, transmission line Z2, transmission line Z3 and transmission line Z4 electricity
Length is all 1/4 wavelength.Four union ends of the branch line coupler 12 are connected to four double minor matters impedance matching boxs 11,
It can realize that impedance converts on both frequencies.If the two frequency intervals are far (such as equal to or more than 1GHz), at this time
First double frequency coupler 1 and the second double frequency coupler 2 realize dual frequency characteristics, (are, for example, less than if the two frequency intervals are close
200MHz), the first double frequency coupler 1 and the second double frequency coupler 2 realize broadband character at this time.
With reference to shown in Fig. 1, the coaxial feed signal wire (the signal phase shift for being assumed to be 0 °) of coaxial connector P0 is connected to
On one double frequency coupler 1, the phase shift of 90 ° of signal can be realized, i.e. coaxial connector P0 exports 0 ° of signal phase shift, second port
P2 exports -90 ° of signal phase shift, the ground wire of the coaxial feed of coaxial connector P0, is equivalent to -180 ° of signal phase shift at this time.
After coaxial connector P0 is connected to the second double frequency coupler 2 by the ground wire of coaxial feed, it can also realize that 90 ° of signal moves
Phase, i.e. third port P3 export -180 ° of signal phase shift, and port P5 exports -270 ° of signal phase shift.Therefore, double-frequency broadband is presented
Electric network can be sequentially output 0 °, -90 °, -180 ° and -270 ° of constant-amplitude signal.
Refering to what is shown in Fig. 2, Fig. 2 is the S parameter simulation result schematic diagram of double-frequency broadband feeding network of the present invention.It can from Fig. 2
To find out, in 1.75GHz to 2.35GHz, the reflectance factor of coaxial connector P0 | S00| in -10dB hereinafter, illustrating that double frequency is wide
Relative bandwidth with feeding network can reach 39%, realize the broadband character of double-frequency broadband feeding network.When relative to same
Signal energy that four output ports of mandrel connector P0 obtain (in Fig. 2 | S10|、|S20|、|S30|、|S40|) attached in -6dB
Closely, illustrate that signal energy can be similar to being assigned on four output terminals of the quartering, i.e. signal energy from coaxial connector P0
Amount can be equally distributed over first port P1, second port P2, third port P3 and the 4th port P4 from coaxial connector P0.
Refering to what is shown in Fig. 3, Fig. 3 is the phase difference simulation result schematic diagram of double-frequency broadband feeding network of the present invention.From Fig. 3
As can be seen that the phase difference between double-frequency broadband feeding network adjacent port is basically stable near 90 ° of phase shifts, this illustrates that double frequency is wide
There is excellent Phasing between four output terminals with feeding network.With reference to shown in Fig. 2, due to four port (first ports
P1, second port P2, third port P3 and the 4th port P4) between signal energy be constant amplitude, phase differs 90 ° of shiftings successively
Phase, therefore the double-frequency broadband feeding network can be widely used on the feed of circular polarized antenna, such as circular polarization antenna array
Row or four-arm spiral antenna, can be applied in RF application on the radio-frequency devices for needing one point of four work(point effect.
Double-frequency broadband feeding network proposed by the present invention is using the signal wire of coaxial connector P0 with ground wire to two double frequencies
Coupler is fed, and 90 ° of phase shift is realized between the adjacent port of four output ports (port P1, P2, P3 and P4).Pass through
To the Reasonable Arrangement of double frequency coupler, the miniaturization of feeding network is realized.Double-frequency broadband feeding network of the present invention is in addition
One advantage is to realize dual frequency characteristics, if two frequency bins suffer closer, Ke Yishi by the impedance matching of double frequency coupler
Existing broadband character.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or the equivalent function transformation that bright specification and accompanying drawing content are made, are directly or indirectly used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (8)
1. a kind of double-frequency broadband feeding network, which is characterized in that the double-frequency broadband feeding network includes coaxial connector, the
Single port, second port, third port, the 4th port, the first double frequency coupler and the second double frequency coupler, wherein：
The signal wire of coaxial connector is connected to the input terminal of the first double frequency coupler, and the ground wire of coaxial connector is connected to second
The input terminal of double frequency coupler；
The straight-through end of first double frequency coupler is connected to the input terminal of first port, and the coupled end of the first double frequency coupler is connected to
The input terminal of second port, the isolation end of the first double frequency coupler are connected to first resistor；
The straight-through end of second double frequency coupler is connected to the input terminal of the 4th port, and the coupled end of the second double frequency coupler is connected to
The input terminal of third port, the isolation end of the second double frequency coupler are connected to second resistance；
First double frequency coupler and the second double frequency coupler are made of 12 section transmission lines, and the electrical length of each section transmission line is equal
For quarter-wave.
2. double-frequency broadband feeding network as described in claim 1, which is characterized in that the coaxial connector, first port,
The impedance of Two-port netwerk, third port and the 4th port is 50 Ω.
3. double-frequency broadband feeding network as described in claim 1, which is characterized in that the electricity of the first resistor and second resistance
Resistance value is 50 Ω.
4. double-frequency broadband feeding network as described in claim 1, which is characterized in that the first double frequency coupler and second pair
Frequency coupler includes four double minor matters impedance matching boxs and a branch line coupler, four connection of the branch line coupler
End is connect to be correspondingly connected on four double minor matters impedance matching boxs.
5. double-frequency broadband feeding network as claimed in claim 4, which is characterized in that double minor matters impedance matching boxs include passing
Defeated line Z1 and transmission line Z2, the transmission line Z1 are concatenated with transmission line Z2.
6. double-frequency broadband feeding network as claimed in claim 5, which is characterized in that the impedance of the transmission line Z1 is 85 Ω,
The impedance of the transmission line Z2 is 62 Ω.
7. double-frequency broadband feeding network as claimed in claim 4, which is characterized in that the branch line coupler includes two sections and passes
The section transmission lines of defeated line Z3 and two Z4, the transmission line Z3 and transmission line Z4 are alternately concatenated into cyclic structure.
8. double-frequency broadband feeding network as claimed in claim 7, which is characterized in that the impedance of the transmission line Z3 is 24 Ω,
The impedance of the transmission line Z4 is 33 Ω.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611247063.2A CN108258438A (en) | 2016-12-29 | 2016-12-29 | Double-frequency broadband feeding network |
| PCT/CN2017/084462 WO2018120592A1 (en) | 2016-12-29 | 2017-05-16 | Dual-frequency broadband feed network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611247063.2A CN108258438A (en) | 2016-12-29 | 2016-12-29 | Double-frequency broadband feeding network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108258438A true CN108258438A (en) | 2018-07-06 |
Family
ID=62706838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611247063.2A Withdrawn CN108258438A (en) | 2016-12-29 | 2016-12-29 | Double-frequency broadband feeding network |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108258438A (en) |
| WO (1) | WO2018120592A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1165588A (en) * | 1995-09-22 | 1997-11-19 | 夸尔柯姆股份有限公司 | Dual-band octafilar helix antenna |
| CN1166238A (en) * | 1995-08-09 | 1997-11-26 | 夸尔柯姆股份有限公司 | Quadrifilar helix antenna and feed network |
| CN103956576A (en) * | 2014-04-26 | 2014-07-30 | 华为技术有限公司 | Feedback network and array antenna |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6681012B1 (en) * | 1999-09-23 | 2004-01-20 | Nortel Networks Limited | Directional receiver coupling arrangement with frequency selectivity and gain control for DSL |
| CN201435450Y (en) * | 2009-06-30 | 2010-03-31 | 华南理工大学 | Polarized reconfigurable radio frequency identification circularly polarized reader antenna |
| CN102280678B (en) * | 2011-05-27 | 2014-04-02 | 华南理工大学 | Balanced radio frequency electrically tunable bandpass filter with constant relative bandwidth |
| CN104966881B (en) * | 2015-06-30 | 2019-01-15 | 南通大学 | A kind of double frequency-band balanced type power splitter |
-
2016
- 2016-12-29 CN CN201611247063.2A patent/CN108258438A/en not_active Withdrawn
-
2017
- 2017-05-16 WO PCT/CN2017/084462 patent/WO2018120592A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166238A (en) * | 1995-08-09 | 1997-11-26 | 夸尔柯姆股份有限公司 | Quadrifilar helix antenna and feed network |
| CN1165588A (en) * | 1995-09-22 | 1997-11-19 | 夸尔柯姆股份有限公司 | Dual-band octafilar helix antenna |
| CN103956576A (en) * | 2014-04-26 | 2014-07-30 | 华为技术有限公司 | Feedback network and array antenna |
Non-Patent Citations (1)
| Title |
|---|
| YONGLE WU, SHAO YONG ZHENG, SAI-WING LEUNG, YUANAN LIU, QUAN XU: "An Analytical Design Method for a Novel Dual-Band Unequal Coupler With Four Arbitrary Terminated Resistances", 《IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018120592A1 (en) | 2018-07-05 |
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Application publication date: 20180706 |
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| WW01 | Invention patent application withdrawn after publication |