CN208674366U - A kind of four-arm spiral antenna - Google Patents
A kind of four-arm spiral antenna Download PDFInfo
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- CN208674366U CN208674366U CN201821497378.7U CN201821497378U CN208674366U CN 208674366 U CN208674366 U CN 208674366U CN 201821497378 U CN201821497378 U CN 201821497378U CN 208674366 U CN208674366 U CN 208674366U
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Abstract
The utility model discloses a kind of four-arm spiral antenna, including antenna body and Antenna baseplate, antenna body includes four antenna spiral arm units for being printed in its outer surface, each antenna spiral arm unit includes spiral arm and the micro-strip grounding parts that are formed by spiral arm close to the end of Cylindric medium plate, and active point of phase shift feeding network is arranged on Antenna baseplate and what is be connected with micro-strip grounding parts cover copper portion.Wherein, antenna divides phase shift feeding network to realize that four spiral arm unit phases of antenna successively differ 90 degree by the function designed on bottom plate, to realize the circular polarization characteristics of antenna；Antenna spiral arm unit uses the form of PIFA antenna, by adjusting the length and width of spiral arm and covering the length in copper portion and the impedance matching of width adjusting antenna, increases the bandwidth of antenna；Size reduces simultaneously, to realize the performance optimization at the broadband miniaturization of antenna and frequency range, antenna gain, elevation angle etc..
Description
Technical field
The utility model relates to a kind of four-arm spiral antennas, optimize more particularly, to a kind of broadband, miniaturization and performance
Four-arm spiral antenna.
Background technique
Four-arm spiral antenna has preferable circular polarization characteristics, is the antenna suitable for navigation system.Existing four arms spiral day
Line there are many, but existing four-arm spiral antenna is generally only comprising one kind in BD/GPS/GLONASS three classes navigation system
Or two class frequency range keep our requirements for navigation antenna higher and higher as a few class navigation system are gradually compatible, need
The band limits of compatible various navigation system and the demand for meeting different navigation system, while antenna low elevation gain is wanted
It asks and out-of-roundness etc. is also higher and higher.
Therefore, it is urgent to provide a kind of four arm spirals of the performances optimizations such as broadband miniaturization and frequency range, antenna gain, the elevation angle
Antenna.
Utility model content
The purpose of the utility model is to overcome the defects of the prior art, provide a kind of four-arm spiral antenna.
To achieve the above object, the utility model proposes following technical solutions: a kind of four-arm spiral antenna, including antenna master
Body and Antenna baseplate, the antenna body include the Cylindric medium plate being fixed on Antenna baseplate and are printed in the Cylindric medium
Four equidistantly distributed the antenna spiral arm unit of plate outer surface, each antenna spiral arm unit include spiral arm and by
Active point of phase shift transmission network is arranged on the Antenna baseplate in the micro-strip grounding parts that spiral arm is formed close to the end of Cylindric medium plate
Network and what is be connected with micro-strip grounding parts cover copper portion, the function divide phase shift feeding network to include the first, second, third and fourth four
Feed port, four spiral arms divide the end of phase shift feeding network to be connected respectively with four feed ports close to function, and institute
The phase stated between four antenna spiral arm units successively differs 90 degree.
Preferably, the length and width of the spiral arm is adjustable, and the length and width of the micro-strip grounding parts
It adjusts.
Preferably, the micro-strip grounding parts include integrated middle part and grounding parts, the middle part by spiral arm end
Portion is laterally drawn, and the grounding parts then by the end downward bending of middle part and extend to the bottom of Cylindric medium plate.
Preferably, the Cylindric medium plate is the flexible high frequency laminate with a thickness of 0.254mm.
Preferably, the antenna spiral arm unit uses the form of PIFA antenna.
Preferably, the function divides phase shift feeding network to include multiple connected power splitters, between the connected power splitter
It is connected by the microstrip line of different length.
Preferably, the power splitter includes the first power splitter, the second power splitter and third power splitter, and each power splitter includes
One input terminal and an output end, the input termination feed input signal of first power splitter, output end passes through micro- respectively
It is connected with line with the input terminal of the input terminal of the second power splitter and third power splitter；The output end of second power splitter leads to respectively
Microstrip line is crossed to be connected with the first feed port and the second feed port；The output end of the third power splitter passes through microstrip line respectively
It is connected with third feed port and the 4th feed port.
Preferably, the power splitter is Wilkinson power divider.
Preferably, the length of the microstrip line of the input terminal of the output end and third power splitter of the first power splitter of the connection is
First length, the length of the microstrip line of the input terminal of the output end and the second power splitter of the first power splitter of the connection are second long
Degree, it is half wavelength that first length, which subtracts the second length, and first feed port and third feed port occur
180 degree phase shift.
Preferably, it is defeated to subtract the second power splitter for the micro-strip line length of the second power splitter output end to the second feed port
The micro-strip line length of outlet to the first feed port is quarter-wave, and first feed port and the second feed port are sent out
Raw 90 degree of phase shifts；The micro-strip line length of third power splitter output end to the 4th feed port subtracts third power splitter output end
Micro-strip line length to third feed port is quarter-wave, and the third feed port and the 4th feed port occur 90
Spend phase shift.
Preferably, the Antenna baseplate is the high frequency laminate with a thickness of 0.635mm.
Preferably, the antenna further includes the pcb board below Antenna baseplate, is put on the pcb board including low noise
Big circuit, the function divide phase shift feeding network to be connected by presenting needle with the low noise amplifier circuit.
The beneficial effects of the utility model are:
1, the broadband of four-arm spiral antenna is realized, frequency range covering: 1559-1610.5MHz meets BD/GPS/
The different demands of all kinds of navigation system of GLONASS.
2, realize the miniaturization of antenna, antenna size: radius 11-14mm is highly less than 36mm；Base plate size: long
40mm, wide 30mm.
3, antenna performance has greatly improved, in full range segment limit (1559-1610.5MHz), antenna gain Gain >
2.0dBi；10-80 ° of elevation angle antenna gain out-of-roundness≤1.5dB.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the utility model antenna；
Fig. 2 is the forward sight or backsight structural representation of Fig. 1；
Fig. 3 is the overlooking structure diagram of Fig. 1；
Fig. 4 is the structural schematic diagram of the utility model antenna spiral arm unit；
Fig. 5 is the structural schematic diagram that function divides phase shift feeding network on the utility model Antenna baseplate.
Appended drawing reference:
100, antenna body, 101, Cylindric medium plate, 102, antenna spiral arm unit, 103, spiral arm, 104, micro-strip connects
Ground portion, 105, feed end, 106, middle part, 107, grounding parts, 200, Antenna baseplate, 201, function divide phase shift feeding network, 202,
Cover copper portion, the 203, first power splitter, the 204, second power splitter, 205, third power splitter, 206, input terminal, 207, output end,
208, the first feed port, the 209, second feed port, 210, third feed port, the 211, the 4th feed port, 212, micro-strip
Line, 300, round pcb board, 400, feedback needle.
Specific embodiment
Below in conjunction with the attached drawing of the utility model, the technical solution of the utility model embodiment is carried out clear, complete
Description.
In conjunction with shown in FIG. 1 to FIG. 3, a kind of revealed four-arm spiral antenna of the utility model embodiment, including antenna master
Body 100 and Antenna baseplate 200, wherein antenna body 100 is fixed on Antenna baseplate 200, is welded in antenna in the present embodiment
On bottom plate 200 comprising a Cylindric medium plate 101 and four antenna spiral arm units 102, Cylindric medium plate 101 is generally empty
Heart cylindrical structure, can also be the column structure of other shapes certainly, and when implementation, the high frequencies such as Taconic TLF or TLY can be used
Plate, with a thickness of the flexible media plate of 0.254mm.
Four antenna spiral 102 structures of arm unit are identical, are printed in the outer surface of Cylindric medium plate 101, and
It is equidistant on outer surface to be uniformly distributed.As shown in connection with fig. 4, each antenna spiral arm unit 102 includes a spiral arm 103 and micro-strip
Grounding parts 103, wherein one end of spiral arm 103 is free end, and the other end extends to the bottom of Cylindric medium plate 101, forms feedback
Electric end 105.Micro-strip grounding parts 104 and spiral arm 103 are integrated, and are micro-strip forms, specifically include integrated centre
Portion 106 and grounding parts 107, wherein middle part 106 is drawn at the position of its feed end 105 to lateral from spiral arm 103,
Grounding parts 107 then by the end downward bending of middle part 106 and extend to the bottom of Cylindric medium plate 101, realize antenna body
100 ground connection.When implementation, the form of PIFA antenna is can be used in antenna spiral arm unit 102.
Preferably, the length and width of spiral arm 103 and the length of micro-strip grounding parts 104 are adjustable with width,
To adjust the impedance matching of antenna, increase the bandwidth of antenna.
In conjunction with shown in Fig. 1, Fig. 3 and Fig. 5, Antenna baseplate 200 is located at the lower section of antenna body 100, and upper surface (is welded
The surface of antenna body 100) on active point of phase shift feeding network 201 is set, (i.e. upper surface divides phase shift to feed except function in remaining place
The elsewhere and entirely lower surface of network 201) copper floor file is all covered, copper portion 202 is covered in formation.When implementation, Antenna baseplate 200 can
Using the high frequencies plates such as Taconic TLF or RO3010, length 40mm, width 30mm, with a thickness of the medium of 0.635mm
Plate.
In the present embodiment, as shown in Figure 3 and Figure 5, function divides phase shift feeding network 201 to specifically include three power splitters, function point
It is connected between device by the microstrip line of different length, for ease of description, defining three power splitters is respectively the first power splitter
203, the second power splitter 204 and third power splitter 205, when implementation, three power splitters 203,204,205 can use Wilkinson
Power splitter.
As shown in figure 5, each power splitter includes an input terminal 206 and an output end 207, wherein the second function point
The output end 207 of device 204 and the output end 207 of third power splitter 205 connect two feed ports respectively, are respectively defined as the first feedback
Electric port 208, the second feed port 209, third feed port 210 and the 4th feed port 211.Specifically, the first power splitter
Input termination feed input signal, as electric feed signal input terminal, output end 207 passes through microstrip line and the second power splitter respectively
204 input terminal 206 and it is connected with the input terminal 206 of third power splitter 205；The output end 207 of second power splitter 204 leads to respectively
Microstrip line is crossed to be connected with the first feed port 208 and the second feed port 209；The output end 207 of third power splitter 205 leads to respectively
Microstrip line is crossed to be connected with third feed port 210 and the 4th feed port 211.
Function divides phase shift feeding network 201 by the first power splitter 203, the second power splitter 204 and third power splitter 205, real
The constant power distribution of existing four feed ports 208,209,210,211；It realizes 90 ° and 180 ° of phase shifts respectively using microstrip line, makes
Four feed ports 208,209,210,211 meet phase difference and successively differ 90 ° in the identical situation of power magnitude,
To guarantee the symmetry of four-arm spiral antenna battle array directional diagram gain.
Specifically, the microstrip line of the output end 207 of the first power splitter 203 and the input terminal 206 of third power splitter 205 is connected
212 length is the first length, the input terminal 206 of the output end 207 and the second power splitter 204 of the first power splitter 203 of connection
The length of microstrip line 212 is the second length, and it is half wavelength, therefore, the first feed end that the first length, which subtracts the second length,
With third feed port 210 180 degree phase shift occurs for mouth 208；The 207 to the second feed port of output end 209 of second power splitter 204
212 length of microstrip line of 212 length of microstrip line the 207 to the first feed port of output end 208 for subtracting the second power splitter 204 be
90 degree of phase shifts occur for quarter-wave, the first feed port 208 and the second feed port 209；The output of third power splitter 205
The output end 207 that 212 length of microstrip line of the 207 to the 4th feed port 211 of end subtracts third power splitter 205 arrives third feed end
212 length of microstrip line of mouth 210 is quarter-wave, and 90 degree of phases occur for third feed port 210 and the 4th feed port 211
It moves.In this way, the phase difference between the first, second, third, fourth feed port 208,209,210,211 is successively in the present embodiment
90 ° of difference.
Four feed ends 105 of four spiral arms 103 on antenna body 100 by welding respectively with antenna bottom
Four feed ports 208,209,210,211 on plate 200 are connected, so that the phase between four antenna spiral arm units 102
Also 90 degree are successively differed, to realize the circular polarization characteristics of antenna.
Further, in conjunction with shown in FIG. 1 to FIG. 3, a kind of revealed four-arm spiral antenna of the utility model embodiment, also
Including being located at the round pcb board 300 below Antenna baseplate 200, the round pcb board 300 in the present embodiment is Anneta module amplification
Circuit board, i.e., include low noise amplifier circuit (not shown) thereon, antenna current feed port, i.e., the first power splitter 203 here
Input terminal 206 is installed on the pcb board 300 by the feedback welding of needle 400, is connected to corresponding low noise amplification on the pcb board 300
The input terminal of circuit.
It designs through the above structure, the utility model four-arm spiral antenna can get: 1, electrical performance characteristics band limits:
1559-1610.5MHz, including GPS L1 wave band/Galileo L1 wave band: 1575.42 ± 1.023MHz；BD B1 wave band:
1561.098±2.046MHz；GLONASS L1 wave band: 1602 ± 4MHz.2, antenna is in 1559-1610.5MHz frequency range
Interior, antenna gain Gain > 2.0dBi has good gain out-of-roundness characteristic in 10 ° -80 ° of the elevation angle, and gain out-of-roundness is less than
Equal to 1.5dB.3, antenna size is small, antenna body size: radius 11-14mm, is highly less than 36mm；Base plate size: long 40mm
Wide 30mm.
The technology contents and technical characteristic of the utility model have revealed that as above, however those skilled in the art still may be used
Can teaching based on the utility model and announcement and make various replacements and modification without departing substantially from the spirit of the present invention, therefore, this
Utility model protection range should be not limited to the revealed content of embodiment, and should include the various replacements without departing substantially from the utility model
And modification, and covered by present patent application claim.
Claims (10)
1. a kind of four-arm spiral antenna, which is characterized in that including antenna body and Antenna baseplate, the antenna body includes fixing
In the Cylindric medium plate on Antenna baseplate and it is printed in four equidistantly distributed the antenna spiral shell of Cylindric medium plate outer surface
Spiral arm unit, each antenna spiral arm unit include spiral arm and are formed by spiral arm close to the end of Cylindric medium plate
Micro-strip grounding parts are arranged active point of phase shift feeding network on the Antenna baseplate and what is be connected with micro-strip grounding parts cover copper portion, institute
Stating function divides phase shift feeding network to include the first, second, third and fourth four feed ports, and four spiral arms are close to function point
The end of phase shift feeding network is connected with four feed ports respectively, and the phase between four antennas spiral arm unit according to
Secondary 90 degree of difference.
2. four-arm spiral antenna according to claim 1, which is characterized in that the length and width of the spiral arm
It adjusts, and the length and width of the micro-strip grounding parts is adjustable.
3. four-arm spiral antenna according to claim 1 or 2, which is characterized in that the micro-strip grounding parts include integrated
Middle part and grounding parts, the middle part are laterally drawn by the end of spiral arm, the grounding parts then from the end of middle part to
Lower bending and the bottom for extending to Cylindric medium plate.
4. four-arm spiral antenna according to claim 1, which is characterized in that the Cylindric medium plate be with a thickness of
The flexible high frequency laminate of 0.254mm.
5. four-arm spiral antenna according to claim 1, which is characterized in that the function divides phase shift feeding network to include multiple
Connected power splitter is connected by the microstrip line of different length between the connected power splitter.
6. four-arm spiral antenna according to claim 5, which is characterized in that the power splitter includes the first power splitter, the
Two power splitters and third power splitter, each power splitter include an input terminal and an output end, first power splitter it is defeated
Enter termination feed input signal, output end passes through the input of the input terminal and third power splitter of microstrip line and the second power splitter respectively
End is connected；The output end of second power splitter passes through microstrip line respectively and is connected with the first feed port and the second feed port；
The output end of the third power splitter passes through microstrip line respectively and is connected with third feed port and the 4th feed port.
7. four-arm spiral antenna according to claim 6, which is characterized in that it is described connection the first power splitter output end and
The length of the microstrip line of the input terminal of third power splitter is the first length, the output end and the second function of the first power splitter of the connection
The length for dividing the microstrip line of the input terminal of device is the second length, and it is half wavelength that first length, which subtracts the second length,
180 degree phase shift occurs for first feed port and third feed port.
8. four-arm spiral antenna according to claim 7, which is characterized in that the second power splitter output end to the second feedback
The micro-strip line length that the micro-strip line length of electric port subtracts the second power splitter output end to the first feed port is quarter-wave
Long, 90 degree of phase shifts occur for first feed port and the second feed port；The third power splitter output end is fed to the 4th
The micro-strip line length that the micro-strip line length of port subtracts third power splitter output end to third feed port is quarter-wave,
90 degree of phase shifts occur for the third feed port and the 4th feed port.
9. four-arm spiral antenna according to claim 1, which is characterized in that the Antenna baseplate is with a thickness of 0.635mm
High frequency laminate.
10. four-arm spiral antenna according to claim 1, which is characterized in that the antenna further includes being located at Antenna baseplate
The pcb board of lower section, includes low noise amplifier circuit on the pcb board, the function divide phase shift feeding network by feedback needle with it is described
Low noise amplifier circuit is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821497378.7U CN208674366U (en) | 2018-09-13 | 2018-09-13 | A kind of four-arm spiral antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821497378.7U CN208674366U (en) | 2018-09-13 | 2018-09-13 | A kind of four-arm spiral antenna |
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| Publication Number | Publication Date |
|---|---|
| CN208674366U true CN208674366U (en) | 2019-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821497378.7U Active CN208674366U (en) | 2018-09-13 | 2018-09-13 | A kind of four-arm spiral antenna |
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| CN (1) | CN208674366U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029737A (en) * | 2019-11-22 | 2020-04-17 | 深圳市鼎耀科技有限公司 | Compact circularly polarized omnidirectional antenna |
| CN114843766A (en) * | 2022-05-31 | 2022-08-02 | 重庆两江卫星移动通信有限公司 | Low-orbit satellite communication antenna |
-
2018
- 2018-09-13 CN CN201821497378.7U patent/CN208674366U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029737A (en) * | 2019-11-22 | 2020-04-17 | 深圳市鼎耀科技有限公司 | Compact circularly polarized omnidirectional antenna |
| CN114843766A (en) * | 2022-05-31 | 2022-08-02 | 重庆两江卫星移动通信有限公司 | Low-orbit satellite communication antenna |
| CN114843766B (en) * | 2022-05-31 | 2024-04-26 | 重庆两江卫星移动通信有限公司 | Low-orbit satellite communication antenna |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Kunshan Dianshan Lake Town City Suzhou city Jiangsu province 215345 Shen road, No. 6 Patentee after: Rosenberg Technology Co.,Ltd. Address before: Kunshan Dianshan Lake Town City Suzhou city Jiangsu province 215300 Shen road, No. 6 Patentee before: ROSENBERGER TECHNOLOGY ( KUNSHAN) Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215300 No.6 Shen'an Road, Dianshanhu Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: ProLogis Communication Technology (Suzhou) Co.,Ltd. Address before: 215345 No. 6 Shen'an Road, Dianshan Lake Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: Rosenberg Technology Co.,Ltd. |