CN212380572U - Broadband GNSS satellite receiving antenna - Google Patents
Broadband GNSS satellite receiving antenna Download PDFInfo
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- CN212380572U CN212380572U CN202020950558.7U CN202020950558U CN212380572U CN 212380572 U CN212380572 U CN 212380572U CN 202020950558 U CN202020950558 U CN 202020950558U CN 212380572 U CN212380572 U CN 212380572U
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Abstract
The utility model provides a broadband GNSS satellite receiving antenna, including first radiation paster, the second radiation paster, first feed probe, the second feed probe, the short circuit probe, a fixed part, by the first dielectric layer, the second dielectric layer, the PCB board that sets gradually from top to bottom, the lower surface of PCB board is equipped with radio frequency amplifier circuit, the upper surface of first dielectric layer is located to first radiation paster, the upper surface of second dielectric layer is located to the second radiation paster, first feed probe and short circuit probe run through first dielectric layer, the second dielectric layer, the PCB board, the second feed probe runs through second dielectric layer, the PCB board; the fixing piece fixes the first medium layer, the second medium layer and the PCB. The utility model provides an antenna with multilayer medium and radiation paster set up in turn adopts the feed probe structure of symmetry to make the antenna obtain showing the improvement on radiation performance to the antenna of making can both keep the superior performance of high stability on all frequencies, can cover the frequency range in the satellite navigation system completely.
Description
Technical Field
The utility model relates to a satellite receiving antenna field especially relates to a broadband GNSS satellite receiving antenna.
Background
The GNSS antenna is compatible with frequency bands of different global satellite navigation systems, and currently, there are four major global satellite navigation systems, namely, the GPS system in the united states, the COMPASS system in China (COMPASS), the GLONASS system in russia (GLONASS), and the GALILEO system in europe (GALILEO). The four systems cover the frequency ranges 1140-1320MHz and 1540-1620MHz, so that finding an antenna with superior radiation performance in the two frequency bands becomes a problem to be solved at present.
There are different problems in the existing GNSS antenna technology:
1. the helical antenna has the characteristic of broadband, but the radiation direction of the helical antenna is bidirectional, and in order to obtain unidirectional radiation, a lambda/4 deep metal reflecting cavity is generally required to be added below the helical antenna, so that the helical antenna is large and heavy;
2. the microstrip antenna has the advantages of small volume, low profile, conformality, low cost and the like, and the laminated microstrip patch antenna further provided by the microstrip antenna has various frequency bands, but experiments show that the impedance bandwidth is too narrow, and the performance is not good enough in the frequency bands;
3. the capacitively coupled stacked patch antenna can improve the bandwidth of the antenna, and it has been proved that the single-layer circularly polarized patch antenna with two capacitive couplings has a significant bandwidth increase because the inductance introduced by the vertical part probe is compensated, however, the performance of the capacitively coupled stacked patch antenna in the frequency bands of 1164-1300MHz and 1559-1610MHz in the prior art is not sufficient.
In summary, there is still room for improvement in the conventional GNSS antenna technology, and a GNSS antenna with better performance in the frequency bands of 1164-.
SUMMERY OF THE UTILITY MODEL
In order to overcome the deficiencies of the prior art, the present invention provides a broadband GNSS satellite receiving antenna, which has better performance in the frequency band ranges of 1164-1300MHz and 1559-1610MHz, and improves the performance of the conventional GNSS antenna in the frequency band range.
The utility model provides a broadband GNSS satellite receiving antenna, including first radiation paster, second radiation paster, first feed probe, second feed probe, short circuit probe, mounting, by first dielectric layer, second dielectric layer, the PCB board that sets gradually from top to bottom, the lower surface of PCB board is equipped with radio frequency amplifier circuit, first radiation paster set up in the upper surface of first dielectric layer, the second radiation paster set up in the upper surface of second dielectric layer, first feed probe with the short circuit probe runs through first dielectric layer, the second dielectric layer, the PCB board, the second feed probe runs through the second dielectric layer, the PCB board; the fixing piece fixes the first dielectric layer, the second dielectric layer and the PCB.
Furthermore, the radio frequency amplification circuit further comprises a shielding cover, wherein the shielding cover is fixed on the lower surface of the PCB and completely covers the radio frequency amplification circuit.
Furthermore, the shielding case is fixed on the lower surface of the PCB board in a welding mode.
Further, the first radiation patch and the second radiation patch are both circular.
Further, the radius of the first radiation patch is smaller than that of the second radiation patch, the first radiation patch covers 1559 and 1610MHz frequency band, and the second radiation patch covers 1164 and 1300MHz frequency band.
Furthermore, the first dielectric layer, the second dielectric layer and the PCB are circular, the radius of the first dielectric layer is smaller than that of the second dielectric layer, and the radius of the second dielectric layer is smaller than that of the PCB.
Further, the number of the first feeding probes is four, the distances from the four first feeding probes to the central axis of the antenna are equal, and the phase difference between two adjacent first feeding probes is 90 °.
Further, the number of the second feeding probes is four, the distances from the four second feeding probes to the central axis of the antenna are equal, and the phase difference between two adjacent second feeding probes is 90 °.
Further, the distance from the second feed probe to the central axis of the antenna is larger than the distance from the first feed probe to the central axis of the antenna.
Furthermore, the radio frequency amplifying circuit is a third-order amplifying circuit, and the third-order amplifying circuit comprises a third-order amplifier; the fixing piece is a plastic screw.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model provides a broadband GNSS satellite receiving antenna, including first radiation paster, the second radiation paster, first feed probe, the second feed probe, the short circuit probe, a fixed part, by the first dielectric layer, the second dielectric layer, the PCB board that sets gradually from top to bottom, the lower surface of PCB board is equipped with radio frequency amplification circuit, first radiation paster sets up in the upper surface of first dielectric layer, the second radiation paster sets up in the upper surface of second dielectric layer, first feed probe and short circuit probe run through first dielectric layer, the second dielectric layer, the PCB board, the second feed probe runs through second dielectric layer, the PCB board; the fixing piece fixes the first medium layer, the second medium layer and the PCB. The utility model discloses to prior art, provide an antenna with multilayer medium and radiation paster set up in turn, and adopt the feed probe structure of symmetry to make the antenna obtain showing the improvement on radiation performance to the antenna of making can all keep the superior performance of high stability on all frequencies, can cover the frequency range in the satellite navigation system completely, shield outside electromagnetic interference effectively through the shield cover to the influence of radio frequency amplifier circuit.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is a top view of a broadband GNSS satellite receiving antenna according to the present invention;
fig. 2 is a cross-sectional view of a portion a of a broadband GNSS satellite receiving antenna of the present invention;
fig. 3 is a simulation diagram of the S parameter of the broadband GNSS satellite receiving antenna of the present invention.
In the figure: 1. a first radiating patch; 2. a second radiating patch; 3. a fixing member; 4. a first feed probe; 5. a shorting probe; 6. a second feed probe; 7. a first dielectric layer; 8. a second dielectric layer; 9. a PCB board; 10. a shield can.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
A broadband GNSS satellite receiving antenna is shown in figures 1 and 2 and comprises a first radiating patch 1, a second radiating patch 2, a first feed probe 4, a second feed probe 6, a short-circuit probe 5, a fixing piece 3, a first dielectric layer 7, a second dielectric layer 8 and a PCB 9 which are sequentially arranged from top to bottom, wherein the upper surface of the PCB 9 is used as a reflecting plate of the GNSS satellite receiving antenna, the lower surface of the PCB 9 is provided with a radio frequency amplifying circuit which is used for amplifying received satellite signals, the first radiating patch 1 is arranged on the upper surface of the first dielectric layer 7, the second radiating patch 2 is arranged on the upper surface of the second dielectric layer 8, the first feed probe 4 and the short-circuit probe 5 penetrate through the first dielectric layer 7, the second dielectric layer 8 and the PCB 9, and the second feed probe 6 penetrates through the second dielectric layer 8 and the PCB 9; the fixing member 3 fixes the first dielectric layer 7, the second dielectric layer 8 and the PCB board 9, in this embodiment, the fixing member 3 is a plastic screw; the radio frequency amplifying circuit is a third-order amplifying circuit, and the third-order amplifying circuit comprises a third-order amplifier and is used for amplifying tiny GNSS satellite signals.
As shown in fig. 2, the rf amplifier further comprises a shielding case 10, wherein the shielding case 10 is fixed on the lower surface of the PCB board 9 and completely covers the rf amplifier circuit. Specifically, the shielding case 10 is fixed to the lower surface of the PCB 9 by soldering, and is used for shielding the influence of external electromagnetic interference on the rf amplifying circuit.
In one embodiment, the first and second radiating patches 1 and 2 are both circular. The radius of the first radiation patch 1 is smaller than that of the second radiation patch 2, the first radiation patch 1 covers 1559 and 1610MHz frequency band, and the second radiation patch 2 covers 1164 and 1300MHz frequency band. The first dielectric layer 7, the second dielectric layer 8 and the PCB 9 are circular, the radius of the first dielectric layer 7 is smaller than that of the second dielectric layer 8, and the radius of the second dielectric layer 8 is smaller than that of the PCB 9. By verification, when the radiation patch is circular and all the main structures are circular, the gain bandwidth of the antenna can be effectively improved, so that the antenna can cover all GNSS frequency bands, namely two frequency ranges of 1164-1300MHz and 1559-1610 MHz.
In one embodiment, the number of the first feeding probes 4 is four, the distances from the four first feeding probes 4 to the central axis of the antenna are equal, and the phase difference between two adjacent first feeding probes 4 is 90 °. The number of the second feed probes 6 is four, the distances from the four second feed probes 6 to the central axis of the antenna are equal, and the phase difference between two adjacent second feed probes 6 is 90 °. The distance of the second feed probe 6 to the central axis of the antenna is greater than the distance of the first feed probe 4 to the central axis of the antenna. Namely, the first feed probes 4 or the second feed probes 6 are uniformly distributed in a symmetrical mode, the phases are sequentially different by 90 degrees and are respectively 0 degree, 90 degrees, 180 degrees and 270 degrees, and the structure can effectively improve the circular polarization purity of the antenna while introducing inductance for compensation to increase the bandwidth.
As shown in FIG. 3, it is clear from the simulation graph of the GNSS antenna S parameters that the broadband GNSS satellite receiving antenna provided by the present invention can completely cover all GNSS frequency bands, i.e. two frequency ranges of 1164 + 1300MHz and 1559 + 1610 MHz.
The utility model provides a broadband GNSS satellite receiving antenna, including first radiation paster, the second radiation paster, first feed probe, the second feed probe, the short circuit probe, a fixed part, by the first dielectric layer, the second dielectric layer, the PCB board that sets gradually from top to bottom, the lower surface of PCB board is equipped with radio frequency amplification circuit, first radiation paster sets up in the upper surface of first dielectric layer, the second radiation paster sets up in the upper surface of second dielectric layer, first feed probe and short circuit probe run through first dielectric layer, the second dielectric layer, the PCB board, the second feed probe runs through second dielectric layer, the PCB board; the fixing piece fixes the first medium layer, the second medium layer and the PCB. The utility model discloses to prior art, provide an antenna with multilayer medium and radiation paster set up in turn, and adopt the feed probe structure of symmetry to make the antenna obtain showing the improvement on radiation performance to the antenna of making can all keep the superior performance of high stability on all frequencies, can cover the frequency range in the satellite navigation system completely, shield outside electromagnetic interference effectively through the shield cover to the influence of radio frequency amplifier circuit.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the utility model can be smoothly implemented by the ordinary technicians in the industry according to the drawings and the above description; however, those skilled in the art should understand that changes, modifications and variations made by the above-described technology can be made without departing from the scope of the present invention, and all such changes, modifications and variations are equivalent embodiments of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. A broadband GNSS satellite receiving antenna, characterized by: the PCB comprises a first radiation patch, a second radiation patch, a first feed probe, a second feed probe, a short-circuit probe, a fixing piece, a first dielectric layer, a second dielectric layer and a PCB board which are sequentially arranged from top to bottom, wherein a radio frequency amplification circuit is arranged on the lower surface of the PCB board, the first radiation patch is arranged on the upper surface of the first dielectric layer, the second radiation patch is arranged on the upper surface of the second dielectric layer, the first feed probe and the short-circuit probe penetrate through the first dielectric layer, the second dielectric layer and the PCB board, and the second feed probe penetrates through the second dielectric layer and the PCB board; the fixing piece fixes the first dielectric layer, the second dielectric layer and the PCB.
2. The broadband GNSS satellite receiving antenna of claim 1, wherein: the shielding case is fixed on the lower surface of the PCB and completely covers the radio frequency amplifying circuit.
3. A broadband GNSS satellite receiving antenna according to claim 2, wherein: the shielding case is fixed on the lower surface of the PCB board in a welding mode.
4. The broadband GNSS satellite receiving antenna of claim 1, wherein: the first radiating patch and the second radiating patch are both circular.
5. The broadband GNSS satellite receiving antenna of claim 4, wherein: the radius of the first radiation patch is smaller than that of the second radiation patch, the first radiation patch covers 1559 and 1610MHz frequency bands, and the second radiation patch covers 1164 and 1300MHz frequency bands.
6. The broadband GNSS satellite receiving antenna of claim 5, wherein: the first dielectric layer, the second dielectric layer and the PCB are circular, the radius of the first dielectric layer is smaller than that of the second dielectric layer, and the radius of the second dielectric layer is smaller than that of the PCB.
7. The broadband GNSS satellite receiving antenna of claim 1, wherein: the number of the first feed probes is four, the distances from the four first feed probes to the central axis of the antenna are equal, and the phase difference between every two adjacent first feed probes is 90 degrees.
8. The broadband GNSS satellite receiving antenna of claim 7, wherein: the number of the second feed probes is four, the distances from the four second feed probes to the central axis of the antenna are equal, and the phase difference between every two adjacent second feed probes is 90 degrees.
9. The broadband GNSS satellite receiving antenna of claim 8, wherein: the distance from the second feed probe to the central axis of the antenna is larger than the distance from the first feed probe to the central axis of the antenna.
10. The broadband GNSS satellite receiving antenna of claim 1, wherein: the radio frequency amplifying circuit is a third-order amplifying circuit, and the third-order amplifying circuit comprises a third-order amplifier; the fixing piece is a plastic screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020950558.7U CN212380572U (en) | 2020-05-29 | 2020-05-29 | Broadband GNSS satellite receiving antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020950558.7U CN212380572U (en) | 2020-05-29 | 2020-05-29 | Broadband GNSS satellite receiving antenna |
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| CN212380572U true CN212380572U (en) | 2021-01-19 |
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| CN202020950558.7U Active CN212380572U (en) | 2020-05-29 | 2020-05-29 | Broadband GNSS satellite receiving antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114094320A (en) * | 2021-11-24 | 2022-02-25 | 上海海积信息科技股份有限公司 | GNSS antenna and combined antenna |
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2020
- 2020-05-29 CN CN202020950558.7U patent/CN212380572U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114094320A (en) * | 2021-11-24 | 2022-02-25 | 上海海积信息科技股份有限公司 | GNSS antenna and combined antenna |
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