CN203225351U - Cassegrain reflector antenna - Google Patents
Cassegrain reflector antenna Download PDFInfo
- Publication number
- CN203225351U CN203225351U CN 201320228957 CN201320228957U CN203225351U CN 203225351 U CN203225351 U CN 203225351U CN 201320228957 CN201320228957 CN 201320228957 CN 201320228957 U CN201320228957 U CN 201320228957U CN 203225351 U CN203225351 U CN 203225351U
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- reflecting surface
- reflector antenna
- feedback type
- antenna
- type reflector
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Abstract
The utility model provides a Cassegrain reflector antenna. The antenna comprises a central plate; a reflector mounted on the central plate; a matching flange mounted on the reflector; a feed source mounted on the matching flange; and a comb choke coil, wherein the comb choke coil is fixed at the edge of an opening of the reflector, and provided with a ring-shaped structure on the surface. The surface of the reflector is configured to be a non-standard paraboloid based on a standard paraboloid modified according to a phase center of the feed source and a radiation directional diagram. By using the Cassegrain reflector antenna provided by the utility model, the shielded energy of the feed source is reduced, the efficiency of the antenna is increased, the properties, such as front-to-back ratio and cross polarization, are improved, the standing-wave ratio of the antenna is improved, and the bandwidth is broadened.
Description
[technical field]
The utility model relates to field of antenna, particularly, relates to a kind of feedback type reflector antenna.
[background technology]
Parabolic antenna is the critical component of the point-to-point relay communications system of microwave, and the quality of antenna performance, depends on the performance of feed to a great extent.With the development of the communications industry, more and more wideer to the bandwidth requirement of parabolic antenna, performance is more and more higher.The feed that present parabolic antenna generally adopts has two kinds, is respectively feed forward type waveguide elbow feed and Bimirror antenna feed, and have following problem: relative bandwidth is narrow, shielded area is big, and gain efficiency is on the low side, and cross polarization is undesirable, sidelobe level height far away, front and back ratio etc.
[utility model content]
The purpose of this utility model provides a kind of have broadband, feedback type reflector antenna that cross polarization characteristics is good.For this reason, feedback type reflector antenna provided by the invention comprises: central plate; Be installed to the reflecting surface of described central plate; Be installed to the coupling flange of reflecting surface; Be installed to the feed of described coupling flange; And be installed on pectination chokes ring on the edge of opening of described reflecting surface, and described pectination chokes ring is fixed on the edge of opening of described reflecting surface, and there is annular pectinate texture on the surface.
As a kind of preferred version, the curved surface of described reflecting surface is based on the non-standard parabola that the standard parabola is made amendment according to phase center and the antenna pattern of described feed.
As a kind of preferred version, described reflecting surface is installed to described central plate by screw; Described reflecting surface comprises that also the V-type counterbore is used for accommodating described screw.
As a kind of preferred version, there is ring ladder on the surface of described coupling flange.
As a kind of preferred version, described feed comprises circular waveguide tube, figuration medium and metallic reflection piece; Described figuration medium and metallic reflection piece are combined an end that is installed to described circular waveguide tube, and the other end of described circular waveguide tube is installed to described coupling flange.
As a kind of preferred version, described figuration dielectric surface has ring-shaped step.
As a kind of preferred version, described metallic reflection piece comprises round platform portion 7 and the conus portion of arranging along the axis of circular waveguide tube, and described conus portion is positioned at the upper end of round platform portion.
As a kind of preferred version, the outer surface of described round platform portion has plural cannelure.
As a kind of preferred version, described figuration medium has the matching section of gradual change impedance, and described matching section at least part of stretches into described circular waveguide tube.
As a kind of preferred version, described feed also comprises at least one dielectric ring, and described dielectric ring loads on the circular waveguide tube the inside.
[description of drawings]
Fig. 1 is the schematic diagram of the wideband feedback type parabolic antenna that provides of the utility model one embodiment;
Fig. 2 is the generalized section of antenna shown in Figure 1;
Fig. 3 is the schematic diagram after amplify at the position of antenna shown in Figure 2;
Fig. 4 is the structural representation of the feed of antenna use shown in Figure 1;
Fig. 5 is the structural representation of the pectination chokes ring of antenna use shown in Figure 1.
[embodiment]
With reference to figure 1 and Fig. 2, the wideband feedback type parabolic antenna that the utility model one embodiment provides comprises 5 key components, is respectively: reflecting surface 1, coupling flange 2, feed 3, pectination chokes ring 4, central plate 5.Reflecting surface 1 is fixed on the central plate 5, and feed 3 is fixed on the reflecting surface 1 by coupling flange 2, and pectination chokes ring 4 is installed on the edge of opening of reflecting surface 1.
In the present embodiment, reflecting surface 1 is not the parabola of standard, but comes corrected curved surface according to phase center and the antenna pattern of feed 3.Why be because the direction of feed is not desirable point source to reflecting surface correction, phase center be not determine a bit, the angle of radiation is also different, therefore all has phase difference.Calculate the mode that combines with software emulation by theory reflecting surface is revised, can change the distance that arrives reflecting surface from different radiation angles, reduce phase difference, thereby improved the gain of antenna.
Wherein, there is ring ladder on the surface of coupling flange 2, except being used for connecting reflecting surface 1 and the feed 3, also being used for will be by the electromagnetic energy of feed 3 shield portions after reflecting surface 1 reflection, reflex to the zone that is not blocked and go, both improved the gain of antenna, improved the standing-wave ratio of antenna again.
Fig. 3 be position shown in Figure 2 with reference to figure 3, reflecting surface 1 comprises the V-type counterbore, it is stamped to form at reflecting surface 1 by mould.Screw passes the V-type counterbore reflecting surface 1 is fixed on the central plate 5.The V-type counterbore is accommodated screw, is used for reducing because of the outstanding reduction that causes the reflecting surface surface accuracy of screw.
With reference to figure 4, feed 3 comprises 5 parts, is respectively matching section 10, one or more dielectric ring 11 of metallic reflection piece 7, figuration medium 8, circular waveguide tube 9, gradual change impedance.Circular waveguide tube 9 one ends are installed to coupling flange 2, other end support metal reflex block 7 and figuration medium 8.
Wherein, metallic reflection piece 7 comprises the 7a of round platform portion and the conus portion 7b that arranges along the axis of circular waveguide tube, and conus portion 7b is positioned at the upper end of the 7a of round platform portion.As shown in the figure, the drift angle of circular cone is littler than the drift angle of round platform.The benefit of doing like this is that the energy that will originally reflex to circular waveguide tube 9 the insides through metallic reflection piece 7 reflexes on the reflecting surface 1, select the bigger cone of angle for use near axis one side, reduce the electromagnetic wave of reflected back circular waveguide tube, improved gain, improved standing-wave ratio.Drive two and a plurality of cannelure on the conical surface, played control feed 3 directional diagrams and the effect that improves standing-wave ratio.
The 8 main effects of figuration medium have: by changing its alteration of form electromagnetic wave through the refractive direction behind the medium, change the directional diagram of feed; Make the coupling between figuration medium and the air, the reflection when reducing electromagnetic wave through both interfaces.
Because circular waveguide tube 9 is different with the equivalent characteristic impedance of figuration medium 8.The words that directly connect both can produce very big reflection electromagnetic wave, cause standing-wave ratio very poor, and in the present embodiment, between adds the matching section 10 of the preceding paragraph gradual change impedance, and matching section 10 partly stretches into described circular waveguide tube 9.The matching section 10 of gradual change impedance and dielectric ring 11 are used for mating the coupling between figuration medium 8 and the circular waveguide tube 9, improve the standing-wave ratio of antenna.In the present embodiment, loading section medium in circular waveguide, be equivalent to change the characteristic impedance of this part circular waveguide, size by regulating dielectric ring 11, dielectric constant, and loading position, make the characteristic impedance of this section circular waveguide tube 9 reach a suitable value, make inborn nature medium 8 and circular waveguide tube 9 better matching, thereby improve the standing-wave ratio of feed 3.
With reference to figure 5, pectination chokes ring 4 is the structure of fixed antenna cover, has the effect that improves antenna front and back ratio simultaneously again.It is fixed on the edge of opening of primary reflection surface, there is annular pectinate texture on the surface, is equivalent to place a plurality of chokes rings at reflecting surface 1 edge of opening, and the chokes ring has the effect that reduces behind the reflecting surface to electric current, thereby reduce antenna diffraction electromagnetic wave, improve the front and back ratio of antenna.
In the preferred embodiment of the present utility model, the electromagnetic wave that sends from circular waveguide tube shines on the reflecting surface according to certain amplitude and phase place after the refraction of reflex block reflection and figuration medium.By the combination taper seat on the reflex block and a series of ring-shaped steps of figuration dielectric surface, realization is to the figuration of feed directional diagram and the control of phase place, on the reflecting surface beyond as much as possible the electromagnetic wave energy uniform irradiation being blocked to feed, reduced the energy that blocks of feed, improved the efficient of antenna, front and back ratio, performances such as cross polarization, also improve simultaneously the standing-wave ratio of antenna, widened bandwidth.By the correction to the reflecting surface curved surface, reduced the electromagnetic wave that sends from feed through the phase difference of reflecting surface reflection back arrival antenna opening diametric plane, the gain that has improved antenna.The coupling flange, the use of measure such as loaded medium ring in the circular waveguide tube has further improved the standing-wave ratio of feed, has realized that antenna standing wave ratio is less than 1.3 under 20% relative bandwidth.Reflecting surface, by with the metallic reflection piece, figuration medium, circular waveguide tube axially circle symmetry are installed, and are assembled on the same axis, at utmost guarantee the polarization purity of antenna, have improved the cross polarization of antenna.In addition, by pectination chokes ring is installed at the reflecting surface edge of opening, reduced antenna diffraction electromagnetic wave, further improved the front and back of antenna and compare index.
For the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (10)
1. a feedback type reflector antenna is characterized in that, described antenna comprises:
Central plate;
Be installed to the reflecting surface of described central plate;
Be installed to the coupling flange of reflecting surface;
Be installed to the feed of described coupling flange; And
Be installed on the pectination chokes ring on the edge of opening of described reflecting surface, described pectination chokes ring is fixed on the edge of opening of described reflecting surface, and there is annular pectinate texture on the surface.
2. feedback type reflector antenna according to claim 1 is characterized in that, the curved surface of described reflecting surface is based on the non-standard parabola that the standard parabola is made amendment according to phase center and the antenna pattern of described feed.
3. feedback type reflector antenna according to claim 2 is characterized in that, described reflecting surface is installed to described central plate by screw; Described reflecting surface comprises that also the V-type counterbore is used for accommodating described screw.
4. feedback type reflector antenna according to claim 1 is characterized in that, there is ring ladder on the surface of described coupling flange.
5. feedback type reflector antenna according to claim 1 is characterized in that, described feed comprises circular waveguide tube, figuration medium and metallic reflection piece; Described figuration medium and metallic reflection piece are combined an end that is installed to described circular waveguide tube, and the other end of described circular waveguide tube is installed to described coupling flange.
6. feedback type reflector antenna according to claim 5 is characterized in that, described figuration dielectric surface has ring-shaped step.
7. feedback type reflector antenna according to claim 5 is characterized in that, described metallic reflection piece comprises round platform portion and the conus portion of arranging along the axis of circular waveguide tube, and described conus portion is positioned at the upper end of round platform portion.
8. feedback type reflector antenna according to claim 7 is characterized in that, the outer surface of described round platform portion has plural cannelure.
9. feedback type reflector antenna according to claim 5 is characterized in that, described figuration medium has the matching section of gradual change impedance, and described matching section at least part of stretches into described circular waveguide tube.
10. feedback type reflector antenna according to claim 9 is characterized in that, described feed also comprises at least one dielectric ring, and described dielectric ring loads on the circular waveguide tube the inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320228957 CN203225351U (en) | 2013-04-28 | 2013-04-28 | Cassegrain reflector antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320228957 CN203225351U (en) | 2013-04-28 | 2013-04-28 | Cassegrain reflector antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203225351U true CN203225351U (en) | 2013-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320228957 Expired - Fee Related CN203225351U (en) | 2013-04-28 | 2013-04-28 | Cassegrain reflector antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203225351U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109244663A (en) * | 2014-10-14 | 2019-01-18 | 优倍快网络公司 | Chokes guard apparatus for antenna system |
| RU2723904C1 (en) * | 2019-10-09 | 2020-06-18 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") | Waveguide radiator |
-
2013
- 2013-04-28 CN CN 201320228957 patent/CN203225351U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109244663A (en) * | 2014-10-14 | 2019-01-18 | 优倍快网络公司 | Chokes guard apparatus for antenna system |
| RU2723904C1 (en) * | 2019-10-09 | 2020-06-18 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") | Waveguide radiator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN GUOREN COMMUNICATION CO., LTD. Free format text: FORMER OWNER: GUOREN COMMUNICATION CO LTD., SHENZHEN Effective date: 20150806 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150806 Address after: 518000 Guangdong city of Shenzhen province Nanshan District high tech park of science and technology in three Chinese central road building A building room 13F1303 Patentee after: Shenzhen compatriots limited company that communicates by letter Address before: 518000 Guangdong city of Shenzhen province Nanshan District high tech Park District in three road of Chinese science and technology building B building 3F and building A 15F Patentee before: Guoren Communication Co., Ltd., Shenzhen |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131002 Termination date: 20190428 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |