CN201369389Y - Shielding ring structure capable of increasing front-to-back ratio of antenna - Google Patents
Shielding ring structure capable of increasing front-to-back ratio of antenna Download PDFInfo
- Publication number
- CN201369389Y CN201369389Y CNU2009200500168U CN200920050016U CN201369389Y CN 201369389 Y CN201369389 Y CN 201369389Y CN U2009200500168 U CNU2009200500168 U CN U2009200500168U CN 200920050016 U CN200920050016 U CN 200920050016U CN 201369389 Y CN201369389 Y CN 201369389Y
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- Prior art keywords
- shading ring
- antenna
- ring structure
- shaped
- reflecting surface
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- Expired - Lifetime
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Abstract
The utility model discloses a shading ring structure capable of increasing the front-to-back ratio of an antenna, wherein the shading ring is connected with the metal reflecting surface of the antenna. The shading ring structure is characterized in that the shading ring structure consists of a metal circular ring with good conductivity, the cross section of the metal circular ring is L-shaped, the heights of the two sides of the L-shaped shielding are integer multiples of quarterly wavelength of the work center of the antenna. The end surface and the outer side of an antenna housing are wrapped by the shading ring, thereby improving the front-to-back ratio performance of the antenna and having no influences on other indexes. The structure has the advantages of simple manufacture and processing, stable and reliable performance, low cost and good popularization value.
Description
Technical field
The utility model relates to the microwave antenna technical field, more particularly relates to microwave antenna surrounding edge structure.
Background technology:
As the antenna that receives in the MTL microwave transmission link, transmits, its space radiation (reception) power is unusual important index at spatial distributions state-directional diagram.European Wireless electric standard association (ETSI) has formulated strict grade scale to the microwave antenna directional diagram that works in different frequency range, its essence is the maximum level of antenna side lobe and back lobe has been done restriction, and rank is high more, and cut-off level is low more.In order to satisfy more high grade requirements, in the Antenna Design there being the general method that adopts: 1. increases the reflecting surface surrounding edge; 2. paste microwave absorbing material at the surrounding edge inner surface; 3. the surrounding edge edge is made irregularly shaped etc.After above method all adopted, than index, the solution of high grade requirements was the target that the microwave antenna design is pursued always to make it satisfy more before and after also needing to continue to improve.
The utility model content
The purpose of this utility model is in order to solve the prior art deficiency, and propose a kind ofly be different from shading ring structure commonly used fully, can further improve 3～5dB than index before and after making antenna.
The utility model is to adopt following technical solution to realize above-mentioned purpose:
Because the microwave antenna more than 2 grades all must be a full-closed structure, that is to say to have radome that antenna opening is sealed, general radome material selects for use condition to be: the dielectric material that satisfies structure, environment and electromagnetic performance etc., as lead oxide, refractory ceramics, fiberglass, complex media materials such as anti-ultraviolet ABS, SMC.No matter which kind of dielectric material can exert an influence to the electromagnetic wave that sees through it, " guiding " portion of energy is transmitted therein, the marginal portion of radome will inevitably produce and the opposite emittance of antenna greatest irradiation direction, makes to raise to level behind the antenna, and variation is compared in front and back.Although this part energy is extremely faint, high grade requirements be can not be ignored, the utility model has adopted shielding mode to stop this part energy to transmit backward just; It is characterized in that this shading ring is connected with antenna metallic reflection face, be made of a kind of metal material identical with reflecting surface that its cross section is L-shaped, this L shaped shading ring outer surface is provided with coating.
This L shaped shading ring and metallic reflection face adopt modes such as welding, riveted joint, bolt to be connected, its material thickness satisfy under the requirement of mechanical strength as far as possible little.
As further specifying of scheme, the depth of section h of L shaped shading ring is 1/4th a integral multiple of antenna work centre wavelength; L shaped shading ring can also be shaped to one simultaneously with reflecting surface; L shaped shading ring need be with radome end face and lateral surface parcel.
The effect that the utility model adopts above technical scheme to reach: the electromagnetic energy that this kind shading ring structure can stop dielectric cap to guide backward, thereby ratio before and after improving, and other index of antenna is not exerted an influence.
Description of drawings:
Fig. 1 is the known antenna configuration schematic diagram;
Fig. 2 is the utility model cross section structure schematic diagram;
Fig. 3 is the L shaped shading ring structural representation of utility model;
Fig. 4 is L shaped shading ring of the utility model and reflecting surface integral structure schematic diagram;
Far-field pattern before and after being installed on the antenna as Fig. 5-6 the utility model;
Fig. 7 is L shaped shading ring of the utility model and radome integral structure schematic diagram.
Description of drawings:
1. the 2. 3. L shaped shading ring of reflecting surface of radome
Embodiment:
As Fig. 1, Fig. 2, shown in Figure 3, the utility model improves the shading ring structure of antenna front and back than index, be on existing antenna foundation, to improve to form, its effect is the electromagnetic radiation that stops dielectric radome to guide backward, this shading ring is connected with antenna metallic reflection face, has an excellent conductive performance by a kind of, and the metal material identical with reflecting surface constitutes, its shape is the annulus that the edge is turned up, its cross section is " L " shape, about 90 ° of angles, and the both sides height is about equally, be 1/4th integral multiple of antenna operation wavelength, material thickness is as far as possible little in the time can satisfying requirement of mechanical strength; L shaped shading ring can be used sheet stamping forming, also can be with the furling plate round machine back welding forming that is shaped, and coatings such as the surface can spray paint, plastics; L shaped shading ring and reflecting surface connected mode can adopt welding, riveted joint, bolt etc.
As the shading ring of this principle of Fig. 4 can also with the reflecting surface integral forming, keep certain altitude h after adopting the stamping die flanging forming, cut unnecessary corner; L shaped shading ring need be with radome end face and lateral surface parcel.
Shown in Fig. 5,6, the utility model principle is the electromagnetic energy that stops dielectric radome to guide backward, increases before and after this device before and after antenna comparison and compare on antenna: before installing additional as Fig. 5 (61.7737dB); Install the back additional as Fig. 6 (68.0915dB), improved 6.3178dB as can be seen, effect obviously.
The utility model structure is not limited to above embodiment, and described L shaped shading ring can independently be processed, and also can shape with reflecting surface is integrated; Can also with the radome integral forming, as Fig. 7; It can also be a kind of tack metallic film; It can also be a kind of conduction good metal lacquer etc.Therefore the equivalent variations of being done according to the utility model claim under the prerequisite that does not break away from the utility model spirit, still belongs to the scope that the utility model is contained.
Claims (5)
1, a kind of shading ring structure that improves antenna front and back ratio, this shading ring is connected with antenna metallic reflection face, it is characterized in that: described shading ring is made of a kind of conduction good metal annulus, its cross section is " L " shape, and this L shaped shading ring both sides height is the integral multiple of antenna work centre wavelength 1/4th.
2, the shading ring structure of ratio before and after the raising antenna according to claim 1, it is characterized in that: this L shaped shading ring is by constituting with the reflecting surface same material, and outer surface is provided with coating.
3, the shading ring structure of ratio before and after the raising antenna according to claim 1 is characterized in that: described L shaped shading ring and antenna reflective face are that welding or riveted joint or bolt are connected.
4, the shading ring structure of ratio before and after the raising antenna according to claim 1 is characterized in that: described L shaped shading ring parcel radome end face and lateral surface.
5, the shading ring structure of ratio before and after the raising antenna according to claim 1 is characterized in that: described L shaped shading ring and reflecting surface or radome integral forming, or a kind of tack metallic film; Or a kind of conduction good metal lacquer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200500168U CN201369389Y (en) | 2009-01-13 | 2009-01-13 | Shielding ring structure capable of increasing front-to-back ratio of antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200500168U CN201369389Y (en) | 2009-01-13 | 2009-01-13 | Shielding ring structure capable of increasing front-to-back ratio of antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201369389Y true CN201369389Y (en) | 2009-12-23 |
Family
ID=41488280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200500168U Expired - Lifetime CN201369389Y (en) | 2009-01-13 | 2009-01-13 | Shielding ring structure capable of increasing front-to-back ratio of antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201369389Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014045253A2 (en) * | 2012-09-24 | 2014-03-27 | Alcatel-Lucent Shanghai Bell Co., Ltd | Joining device for fastening a radome onto an antenna reflector |
| CN104685711A (en) * | 2012-08-31 | 2015-06-03 | 康普技术有限责任公司 | Radome attachment band clamp |
-
2009
- 2009-01-13 CN CNU2009200500168U patent/CN201369389Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104685711A (en) * | 2012-08-31 | 2015-06-03 | 康普技术有限责任公司 | Radome attachment band clamp |
| CN104685711B (en) * | 2012-08-31 | 2017-05-31 | 康普技术有限责任公司 | Antenna house attachment strip is pressed from both sides |
| WO2014045253A2 (en) * | 2012-09-24 | 2014-03-27 | Alcatel-Lucent Shanghai Bell Co., Ltd | Joining device for fastening a radome onto an antenna reflector |
| WO2014045253A3 (en) * | 2012-09-24 | 2014-05-22 | Alcatel-Lucent Shanghai Bell Co., Ltd | Joining device for fastening a radome onto an antenna reflector |
| US9768489B2 (en) | 2012-09-24 | 2017-09-19 | Alcatel Lucent | Joining device for fastening a radome onto an antenna reflector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091223 |
|
| CX01 | Expiry of patent term |