CN108258388A - Double-frequency broadband four-arm spiral antenna - Google Patents
Double-frequency broadband four-arm spiral antenna Download PDFInfo
- Publication number
- CN108258388A CN108258388A CN201611244713.8A CN201611244713A CN108258388A CN 108258388 A CN108258388 A CN 108258388A CN 201611244713 A CN201611244713 A CN 201611244713A CN 108258388 A CN108258388 A CN 108258388A
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- China
- Prior art keywords
- double
- port
- coupler
- transmission line
- frequency coupler
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The present invention discloses a kind of double-frequency broadband four-arm spiral antenna, including feeding network and cylindrical radiation body, the outer surface of cylindrical radiation body is provided with four spiral radiation arms, each spiral radiation arm is connected in turn by respective metal column on four ports of feeding network, feeding network includes coaxial connector, 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 connects the input terminal of the second double frequency coupler.The straight-through end connection first port of first double frequency coupler, the coupled end connection second port of the first double frequency coupler, the isolation end of the first double frequency coupler are connected to first resistor；The straight-through end of second double frequency coupler connects the 4th port, 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 dual frequency characteristics of four-arm spiral antenna but 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 four-arm spiral antennas.
Background technology
In recent years, with satellite navigation, the fast development and extensive use of satellite communication, four-arm spiral antenna is as these
The headend equipment of system, the quality of performance indicator, for the performance of satellite communication hand-held terminal and radio frequency identification card-reading apparatus
It plays an important role.In addition, for the ease of satellite communication terminal and the large-scale promotion application of radio-frequency recognition system, it is
The financial cost and volume size of system are all vital Considerations, as the circular polarized antenna of wherein important component,
Under the premise of ensureing superior performance index, it is necessary to have the characteristics of of low cost, compact-sized and compact.To four arm spiral shells
When the feeding network of rotation antenna is fed, need to be designed feeding network.Since present four-arm spiral antenna all needs
Want multifrequency, broadband, miniaturization.And existing feeding network is bulky, is unfavorable for four-arm spiral 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 four-arm spiral antenna, it is intended to solve existing feeding network body
Product is huge, is unfavorable for the integrated of four-arm spiral antenna radio-frequency front-end, and be operated in single frequency point mostly, be unfavorable in multifrequency or
The technical issues of working under broadband condition.
To achieve the above object, the present invention provides a kind of double-frequency broadband four-arm spiral antenna, including cylindrical radiation body
And feeding network, the outer surface of the cylindrical radiation body are provided with four spiral radiation arms, the one of each spiral radiation arm
End is set there are one metal column, and the feeding network includes coaxial connector, first port, second port, third port, the 4th
Port, the first double frequency coupler and the second double frequency coupler, wherein：
Four spiral radiation arms be connected in turn by respective metal column the output terminal of first port, second port it is defeated
Outlet, the output terminal of third port, the 4th port output terminal；
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；
First double frequency coupler and the second double frequency coupler are made of 12 section transmission lines, and the electricity of each section transmission line is long
Degree is 1/4 wavelength.
Preferably, each spiral radiation arm is made of two microstrip lines, wherein second microstrip line it is L-shaped and with
First microstrip line connection.
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 on four double minor matters impedance matching boxs.
Preferably, double minor matters impedance matching boxs include transmission line Z1 and transmission line Z2, transmission line Z1 and transmission line Z2
Concatenation.
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 four-arm spiral antenna of the present invention uses above-mentioned technical proposal, reaches
Following technique effect：Since feeding network can be 0 °, -90 °, -180 ° and -270 ° that four-arm spiral antenna provides constant amplitude respectively
Phase shift, in addition so that four-arm spiral antenna can obtain excellent circular polarisation performance.Pass through the double frequency coupler to feeding network
Reasonable Arrangement, realize the miniaturization of feeding network.Dual frequency characteristics are realized by the impedance matching of double frequency coupler, if two
Frequency point suffers closer, can realize broadband character.
Description of the drawings
Fig. 1 is the dimensional structure diagram of double-frequency broadband four-arm spiral antenna preferred embodiment of the present invention；
Fig. 2 is the planar development schematic diagram of the radiator of double-frequency broadband four-arm spiral antenna of the present invention；
Fig. 3 is the circuit diagram of the feeding network of double-frequency broadband four-arm spiral antenna of the present invention；
Fig. 4 is the S parameter simulation result schematic diagram of the feeding network of double-frequency broadband four-arm spiral antenna of the present invention；
Fig. 5 is the phase difference simulation result schematic diagram of the feeding network of double-frequency broadband four-arm spiral antenna 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 stereochemical structure signal of double-frequency broadband four-arm spiral antenna preferred embodiment of the present invention
Figure.In the present embodiment, the double-frequency broadband four-arm spiral antenna includes feeding network 10 and cylindrical radiation body 20, the circle
The outer surface of cylindricality radiator 20 is provided with four spiral radiation arms 30, and there are one one end settings of each spiral radiation arm 30
Metal column 40.Four spiral radiation arms 30 are connected to four ports (ginseng of feeding network 10 in turn by respective metal column 40
Examine first port P1 shown in Fig. 3, second port P2, third port P3, the 4th port P4) output terminal, the feeding network
10 are integrated on pcb board.Pcb board uses specific plank type, and for RO4350B, wherein relative dielectric constant 3.48, plate thickness are
0.762mm。
Refering to what is shown in Fig. 2, Fig. 2 is the planar development schematic diagram of the radiator of double-frequency broadband four-arm spiral antenna of the present invention.
The cylindrical radiation body 20 is made of soft frivolous dielectric-slab, and specific plank type is the dielectric-slab of FR4 types, wherein phase
To dielectric constant 2.2, dielectric-slab is bent to hollow cylindrical radiation body 20.Four spiral radiation arms 30 are printed on cylinder
On the dielectric-slab of radiator 20, it is preferred that the vertical range L0 between adjacent two spiral radiation arms 30 is 51mm.Each spiral shell
Rotation radiation arm 30 is made of two microstrip lines, and second microstrip line is L-shaped and is connect with first microstrip line.Wherein, first
The length L1 of microstrip line is 142mm, width L2 is 12mm, and the L-shaped L4 length of second microstrip line is 138mm, width L5 is
5mm.Connection length L3 between first microstrip line and second microstrip line is 10.5mm.
With reference to shown in Fig. 3, Fig. 3 is the circuit diagram of 10 preferred embodiment of feeding network shown in Fig. 1.In this implementation
In example, the feeding network 10 includes coaxial connector P, first port P1, second port P2, third port P3, the 4th end
Mouth P4, the first double frequency coupler 1 and the second double frequency coupler 2.The coaxial connector P is that an impedance value is the coaxial of 50 Ω
Connector, the coaxial feed input terminal as feeding network 10.In the present embodiment, the signal wire of coaxial connector P is connected to
The input terminal of first double frequency coupler 1, the ground wire of coaxial connector P are connected to the input terminal of the second double frequency coupler 2.Wherein：
The straight-through end of first double frequency coupler 1 is connected to the input terminal of first port P1, the coupled end of the first double frequency coupler 1 is connected to
The input terminal of second port P2, the first double frequency coupler 1 isolation end be connected to first resistor R1.Second double frequency coupler 2
Straight-through end is connected to the input terminal of the 4th port P4, the coupled end of the second double frequency coupler 2 is connected to the input of third port P3
It holds, the isolation end of the second double frequency coupler 2 is connected to second resistance R2.The resistance value of the first resistor R1 and second resistance R2
The resistance of both preferably 50 Ω, the coaxial connector P, first port P1, second port P2, third port P3 and the 4th port P4
It is anti-to be 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.
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., described transmission line Z1, transmission line Z2, transmission line Z3 and transmission line Z4
Electrical length all be 1/4 wavelength.Since four union ends of branch line coupler 12 are correspondingly connected to four double minor matters impedances
On orchestration 11, it can realize that impedance converts on both frequencies.If the two frequency intervals it is far (such as equal to or more than
1GHz), the first double frequency coupler 1 and the second double frequency coupler 2 realize dual frequency characteristics at this time, if the two frequency intervals are close
(being, for example, less than 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. 3, the coaxial feed signal wire (the signal phase shift for being assumed to be 0 °) of coaxial connector P is connected to first
On double frequency coupler 1, the phase shift of 90 ° of signal can be realized, i.e. first port P1 exports 0 ° of signal phase shift, and second port P2 is defeated
Go out -90 ° of signal phase shift, the ground wire of the coaxial feed of coaxial connector P is equivalent to -180 ° of signal phase shift at this time.Coaxially connect
It connects after device P is connected to the second double frequency coupler 2 by the ground wire of coaxial feed, can also realize 90 ° of signal phase shift, i.e. third
Port P3 exports -180 ° of signal phase shift, and port P5 exports -270 ° of signal phase shift.
Refering to what is shown in Fig. 4, Fig. 4 is the S parameter simulation result of the feeding network of double-frequency broadband four-arm spiral antenna of the present invention
Schematic diagram.From fig. 4, it can be seen that in 1.75GHz to 2.35GHz, the reflectance factor of coaxial connector P0 | S00| -10dB with
Under, 39% can be reached by illustrating the relative bandwidth of feeding network 10, realize the broadband character of feeding network.When relative to coaxial
Signal energy that four output ports of 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. 5, Fig. 5 is the phase difference simulation result of the feeding network of double-frequency broadband four-arm spiral antenna of the present invention
Schematic diagram.From figure 5 it can be seen that the phase difference between adjacent port is basically stable near 90 ° of phase shifts, this illustrates feeding network
There is excellent shifting between 10 four output ports (first port P1, second port P2, third port P3 and the 4th port P4)
Phase effect.With reference to shown in Fig. 4, since the signal exported between four ports is constant amplitude, phase differs 90 ° of phase shifts successively.
Double-frequency broadband four-arm spiral antenna of the present invention provides constant amplitude respectively using feeding network for four-arm spiral antenna
0 °, -90 °, -180 ° and -270 ° of phase shifts so that four-arm spiral antenna can obtain excellent circular polarisation performance.In addition, pass through
To the Reasonable Arrangement of the double frequency coupler of feeding network, the miniaturization of feeding network is realized.It is coupled by the double frequency of feeding network
Dual frequency characteristics are realized in the impedance matching of device, if two frequency bins suffer closer, can realize 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 (9)
- A kind of 1. double-frequency broadband four-arm spiral antenna, including cylindrical radiation body and feeding network, which is characterized in that the cylinder The outer surface of shape radiator is provided with four spiral radiation arms, and one end of each spiral radiation arm is set there are one metal column, The feeding network includes coaxial connector, first port, second port, third port, the 4th port, the first double frequency coupler With the second double frequency coupler, wherein：Four spiral radiation arms are connected to the output terminal of first port, the output of second port in turn by respective metal column End, the output terminal of third port, the 4th port output terminal；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 1/4 wavelength.
- 2. double-frequency broadband four-arm spiral antenna as described in claim 1, which is characterized in that each spiral radiation arm by Two microstrip lines are formed, wherein second microstrip line is L-shaped and is connect with first microstrip line.
- 3. double-frequency broadband four-arm spiral antenna as described in claim 1, which is characterized in that the coaxial connector, first end Mouth, second port, third port and the impedance of the 4th port are 50 Ω.
- 4. double-frequency broadband four-arm spiral antenna as claimed in claim 3, which is characterized in that the first resistor and second resistance Resistance value be 50 Ω.
- 5. double-frequency broadband four-arm spiral antenna as described in claim 1, which is characterized in that the first double frequency coupler and Two double frequency couplers include four double minor matters impedance matching boxs and a branch line coupler, and the four of the branch line coupler A union end is correspondingly connected on four double minor matters impedance matching boxs.
- 6. double-frequency broadband four-arm spiral antenna as claimed in claim 5, which is characterized in that double minor matters impedance matching box packets Transmission line Z1 and transmission line Z2 are included, transmission line Z1 is concatenated with transmission line Z2.
- 7. double-frequency broadband four-arm spiral antenna as claimed in claim 6, which is characterized in that the impedance of the transmission line Z1 is 85 The impedance of Ω, the transmission line Z2 are 62 Ω.
- 8. double-frequency broadband four-arm spiral antenna as claimed in claim 5, which is characterized in that the branch line coupler includes two The section transmission lines of section transmission line Z3 and two Z4, the transmission line Z3 and transmission line Z4 are alternately concatenated into cyclic structure.
- 9. double-frequency broadband four-arm spiral antenna as claimed in claim 8, which is characterized in that the impedance of the transmission line Z3 is 24 The impedance of Ω, the transmission line Z4 are 33 Ω.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244713.8A CN108258388A (en) | 2016-12-29 | 2016-12-29 | Double-frequency broadband four-arm spiral antenna |
| PCT/CN2017/084464 WO2018120594A1 (en) | 2016-12-29 | 2017-05-16 | Dual-frequency broadband quadrifilar helical antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244713.8A CN108258388A (en) | 2016-12-29 | 2016-12-29 | Double-frequency broadband four-arm spiral antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108258388A true CN108258388A (en) | 2018-07-06 |
Family
ID=62707816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611244713.8A Withdrawn CN108258388A (en) | 2016-12-29 | 2016-12-29 | Double-frequency broadband four-arm spiral antenna |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108258388A (en) |
| WO (1) | WO2018120594A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109768388A (en) * | 2019-02-26 | 2019-05-17 | 广州市中海达测绘仪器有限公司 | GNSS Multi-arm spiral antenna and GNSS receiver |
| CN110690561A (en) * | 2019-10-28 | 2020-01-14 | 国网思极神往位置服务（北京）有限公司 | Broadband miniaturized antenna applied to satellite navigation terminal and working method thereof |
| CN111883920A (en) * | 2020-08-04 | 2020-11-03 | 南京理工大学 | Eight-arm helical antenna |
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| CN1166238A (en) * | 1995-08-09 | 1997-11-26 | 夸尔柯姆股份有限公司 | Quadrifilar helix antenna and feed network |
| CN1218582A (en) * | 1996-03-19 | 1999-06-02 | 法国电讯公司 | Helix antenna with built-in broadband power supply, and manufacture thereof |
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| CN105576353A (en) * | 2015-12-17 | 2016-05-11 | 上海海积信息科技股份有限公司 | Helical antenna |
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| US6653987B1 (en) * | 2002-06-18 | 2003-11-25 | The Mitre Corporation | Dual-band quadrifilar helix antenna |
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| CN101702463B (en) * | 2009-10-31 | 2013-07-24 | 华南理工大学 | Dielectric-loaded quadrifilar helix antenna of power-division phase-shift feed network |
| US8547291B1 (en) * | 2011-07-29 | 2013-10-01 | The United States Of America As Represented By The Secretary Of The Navy | Direct fed bifilar helix antenna |
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- 2016-12-29 CN CN201611244713.8A patent/CN108258388A/en not_active Withdrawn
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2017
- 2017-05-16 WO PCT/CN2017/084464 patent/WO2018120594A1/en active Application Filing
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| CN1166238A (en) * | 1995-08-09 | 1997-11-26 | 夸尔柯姆股份有限公司 | Quadrifilar helix antenna and feed network |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109768388A (en) * | 2019-02-26 | 2019-05-17 | 广州市中海达测绘仪器有限公司 | GNSS Multi-arm spiral antenna and GNSS receiver |
| CN110690561A (en) * | 2019-10-28 | 2020-01-14 | 国网思极神往位置服务（北京）有限公司 | Broadband miniaturized antenna applied to satellite navigation terminal and working method thereof |
| CN110690561B (en) * | 2019-10-28 | 2023-09-22 | 国网思极神往位置服务（北京）有限公司 | Broadband miniaturized antenna applied to satellite navigation terminal and working method thereof |
| CN111883920A (en) * | 2020-08-04 | 2020-11-03 | 南京理工大学 | Eight-arm helical antenna |
| CN111883920B (en) * | 2020-08-04 | 2023-02-17 | 南京理工大学 | Eight-arm helical antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018120594A1 (en) | 2018-07-05 |
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Application publication date: 20180706 |