CN204144439U - The double-deck double frequency round polarized antenna of double-fed of center short circuit - Google Patents
The double-deck double frequency round polarized antenna of double-fed of center short circuit Download PDFInfo
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- CN204144439U CN204144439U CN201420580832.0U CN201420580832U CN204144439U CN 204144439 U CN204144439 U CN 204144439U CN 201420580832 U CN201420580832 U CN 201420580832U CN 204144439 U CN204144439 U CN 204144439U
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- radiation fin
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Abstract
The utility model provides the double-deck double frequency round polarized antenna of double-fed of a kind of center short circuit, and upper strata radiation fin and lower floor's radiation fin are connected by screw antenna substrate upper surface, upper strata radiation fin, parallel between lower floor's radiation fin and antenna substrate; Central metal hold-down screw is positioned at antenna substrate center, upper strata radiation fin, lower floor's radiation fin is connected with antenna substrate short circuit; Feeding network is installed on antenna substrate lower surface, the orthogonally polarized signal of constant power distribution, 90 ° of phase shifts is provided, feed pin upper end is through antenna substrate and lower floor's radiation fin, to the electrical connection of upper strata radiation fin, directly present, and feed pin is not connected with antenna substrate and lower floor's radiation fin, lower floor's radiation fin couple feed, feed pin lower end is connected with feeding network, inputs or outputs radiofrequency signal by feeding network and connector.The utility model can either make any frequency range coverage of antenna wider, can cover multiple contiguous navigation frequency; Obviously can strengthen again the structural strength of antenna.
Description
Technical field
The present invention relates to antenna system, especially a kind of circular polarized antenna.
Background technology
In recent years, along with the fast development along with modern airmanship, Satellite Navigation Technique obtains and applies more widely in daily life and communication.But, in application system as a lot of in the dipper system of China, GPS and long-range remote sensing etc., all require that antenna to meet pair/multiband job requirement, and each frequency range there is certain frequency bandwidth requirement.In order to solve the wider problem of antenna single frequency band circular polarization frequency band, the double-deck double frequency round polarized antenna form of the double-fed of air dielectric can be adopted.But under some special cases, when using as carried at the platform such as aircraft, rocket, the Oscillation Amplitude of antenna is comparatively large, comparatively harsh to the Structural strength calls of antenna.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides the double-deck double frequency round polarized antenna of double-fed of a kind of center short circuit, the problem that in prior art, after the design of circular polarized antenna two-band, working band is narrower can either be solved, make any frequency range coverage of antenna wider, multiple contiguous navigation frequency can be covered; Obviously can strengthen again the structural strength of antenna.
The technical solution adopted for the present invention to solve the technical problems is: comprise antenna substrate, lower floor's radiation fin, upper strata radiation fin, central metal hold-down screw, feeding network and feed pin; Upper strata radiation fin and lower floor's radiation fin are connected by screw antenna substrate upper surface, upper strata radiation fin, parallel between lower floor's radiation fin and antenna substrate; Central metal hold-down screw is positioned at antenna substrate center, upper strata radiation fin, lower floor's radiation fin is connected with antenna substrate short circuit; Feeding network is installed on antenna substrate lower surface, the orthogonally polarized signal of constant power distribution, 90 ° of phase shifts is provided, two feed pin upper ends are through antenna substrate and lower floor's radiation fin, to the electrical connection of upper strata radiation fin, directly present, and feed pin is not connected with antenna substrate and lower floor's radiation fin, lower floor's radiation fin couple feed, feed pin lower end is connected with feeding network, inputs or outputs radiofrequency signal by feeding network and connector.
Described upper strata radiation fin, to be filled by air between lower floor's radiation fin and antenna substrate.
Described upper strata radiation fin and lower floor's radiation fin are regular symmetric figure.
Described upper strata radiation fin size is less than lower floor's radiation fin.
Described upper strata radiation fin and lower floor's radiation fin adopt sheet metal or cover copper dielectric-slab and make.
The invention has the beneficial effects as follows: by changing two-layer radiation fin size, the resonance frequency of antenna can be adjusted.By the orthogonal 90 ° of feeds of double-fed acusector, good circular polarization characteristics can be obtained.Two-layer radiation fin and the distance with antenna substrate being set by using, antenna frequency bandwidth characteristics can be improved, expand frequency bandwidth, solve the problem that the rear working band of two-band design is narrower.By upper and lower radiation fin being fixed on antenna substrate with metallic screw, antenna structure intensity is obviously strengthened.
Accompanying drawing explanation
Fig. 1 is the package assembly tangent plane schematic diagram of circular polarized antenna of the present invention;
Fig. 2 is the schematic top plan view of circular polarized antenna of the present invention several shape of radiation fin at the middle and upper levels, and wherein, (a) is square, and (b) is rhombus, and (c) be circle;
Fig. 3 is the schematic top plan view of several shape of lower floor's radiation fin in circular polarized antenna of the present invention, and wherein, (a) is square, and (b) is rhombus, and (c) is circular.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described, the present invention includes but be not limited only to following embodiment.
A kind of circular polarized antenna, this antenna comprises: two-layer radiation fin, two feeding networks run through after the feed pin that antenna substrate is electrically connected with lower floor's radiation fin and with upper strata radiation fin and feeding network, the central metal hold-down screw be connected with antenna substrate and levels radiation fin, the dielectric support screw of surrounding, an antenna substrate and an antenna substrate.Radiation fin produces the linearly polarized radiation of two orthogonal, axial constant amplitudes, is provided the orthogonally polarized signal of constant power distribution, 90 ° of phase shifts, thus form circular polarization by feeding network.
As shown in Figure 1, be the tangent plane schematic diagram of the embodiment of circular polarized antenna of the present invention.The present embodiment comprises antenna substrate 1, lower floor's radiation fin 2, upper strata radiation fin 3, dielectric support/hold-down screw 4, central metal hold-down screw 5, the feeding network 6 being positioned at antenna substrate 1 back side, feed pin 7 and connector 8.In figure, the dielectric support/hold-down screw 4 of upper and lower layer radiation fin and central metal hold-down screw 5 are connected to upper and lower layer radiation fin on antenna substrate 1, strengthen antenna strength.Wherein, dielectric support/hold-down screw 4 is positioned at radiation fin edge; Central metal hold-down screw 5 is positioned at center of antenna, both strengthens antenna, makes again lower floor's radiation fin 2 and upper strata radiation fin 3 center good earth.The feeding network 6 of antenna is positioned at antenna substrate 1 back side, provides the orthogonally polarized signal of constant power distribution, 90 ° of phase shifts; Feed pin 7 upper end of antenna, by antenna substrate 1 and lower floor's radiation fin 2, is not connected with antenna substrate 1 and lower floor's radiation fin 2, is electrically connected upper strata radiation fin 3, directly presents, lower floor's radiation fin couple feed; Lower end is connected with feeding network 6, by feeding network 6 and connector 8 I/O radiofrequency signal.
In the present embodiment, filled by air between antenna substrate and upper and lower layer radiation fin.
Described upper strata radiation fin size is less than lower floor's radiation fin.
Upper and lower layer radiation fin can be sheet metal or covers copper dielectric-slab and make.
This antenna upper and lower layer radiation fin profile is generally regular symmetric figure (as Fig. 2, Fig. 3), based on square, rhombus and circle.The radiation characteristic of circular polarized antenna of the present invention in two frequency ranges and resonance characteristic are highly decided by radiation fin and its respectively.As height h2, the size w2 of upper strata radiation fin 3 and feed pin link position d determine resonance frequency and the radiation characteristic of the high band of this antenna; And lower floor radiation fin height h1 and size w1 and levels spacing h2 determines resonance frequency and the radiation characteristic of the low-frequency range of this antenna.Wherein, h1 and h2 and radiation fin size larger to antenna band widths affect.
Claims (5)
1. the double-deck double frequency round polarized antenna of the double-fed of a center short circuit, comprise antenna substrate, lower floor's radiation fin, upper strata radiation fin, central metal hold-down screw, feeding network and feed pin, it is characterized in that: upper strata radiation fin and lower floor's radiation fin are connected by screw antenna substrate upper surface, upper strata radiation fin, parallel between lower floor's radiation fin and antenna substrate; Central metal hold-down screw is positioned at antenna substrate center, upper strata radiation fin, lower floor's radiation fin is connected with antenna substrate short circuit; Feeding network is installed on antenna substrate lower surface, the orthogonally polarized signal of constant power distribution, 90 ° of phase shifts is provided, two feed pin upper ends are through antenna substrate and lower floor's radiation fin, to the electrical connection of upper strata radiation fin, directly present, and feed pin is not connected with antenna substrate and lower floor's radiation fin, lower floor's radiation fin couple feed, feed pin lower end is connected with feeding network, inputs or outputs radiofrequency signal by feeding network and connector.
2. the double-deck double frequency round polarized antenna of the double-fed of center according to claim 1 short circuit, is characterized in that: described upper strata radiation fin, filled by air between lower floor's radiation fin and antenna substrate.
3. the double-deck double frequency round polarized antenna of the double-fed of center according to claim 1 short circuit, is characterized in that: described upper strata radiation fin and lower floor's radiation fin are regular symmetric figure.
4. the double-deck double frequency round polarized antenna of the double-fed of center according to claim 1 short circuit, is characterized in that: described upper strata radiation fin size is less than lower floor's radiation fin.
5. the double-deck double frequency round polarized antenna of the double-fed of center according to claim 1 short circuit, is characterized in that: described upper strata radiation fin and lower floor's radiation fin adopt sheet metal or cover copper dielectric-slab and make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420580832.0U CN204144439U (en) | 2014-10-09 | 2014-10-09 | The double-deck double frequency round polarized antenna of double-fed of center short circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420580832.0U CN204144439U (en) | 2014-10-09 | 2014-10-09 | The double-deck double frequency round polarized antenna of double-fed of center short circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204144439U true CN204144439U (en) | 2015-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420580832.0U Active CN204144439U (en) | 2014-10-09 | 2014-10-09 | The double-deck double frequency round polarized antenna of double-fed of center short circuit |
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| CN (1) | CN204144439U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655698A (en) * | 2016-01-13 | 2016-06-08 | 深圳华天信通科技有限公司 | Circular Beidou multifrequency aviation antenna device |
| CN105811069A (en) * | 2016-04-05 | 2016-07-27 | 中国电子科技集团公司第二十研究所 | Cavity structured global navigation satellite system (GNSS) antenna |
| CN106299673A (en) * | 2016-11-08 | 2017-01-04 | 中国电子科技集团公司第二十研究所 | A kind of small sized wide-band circular polarized antenna |
-
2014
- 2014-10-09 CN CN201420580832.0U patent/CN204144439U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655698A (en) * | 2016-01-13 | 2016-06-08 | 深圳华天信通科技有限公司 | Circular Beidou multifrequency aviation antenna device |
| CN105811069A (en) * | 2016-04-05 | 2016-07-27 | 中国电子科技集团公司第二十研究所 | Cavity structured global navigation satellite system (GNSS) antenna |
| CN106299673A (en) * | 2016-11-08 | 2017-01-04 | 中国电子科技集团公司第二十研究所 | A kind of small sized wide-band circular polarized antenna |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |