CN201490339U - Directional antenna - Google Patents
Directional antenna Download PDFInfo
- Publication number
- CN201490339U CN201490339U CN2009200831438U CN200920083143U CN201490339U CN 201490339 U CN201490339 U CN 201490339U CN 2009200831438 U CN2009200831438 U CN 2009200831438U CN 200920083143 U CN200920083143 U CN 200920083143U CN 201490339 U CN201490339 U CN 201490339U
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- CN
- China
- Prior art keywords
- circular polarization
- antenna
- directional antenna
- utility
- polarization radiation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a directional antenna, which is characterized in that: the directional antenna is composed of a waveguide feed network and a circular polarization radiating element layer (1) which is connected with the waveguide feed network, and more than one circular polarization radiating element (3) is arranged on the circular polarization radiating element layer (1). The structure of the directional antenna is concise, the thickness of the antenna can be reduced, and the axial ratio performance of the antenna is very stable and is better than the existing millimeter wave circular polarization cover.
Description
Technical field
The utility model relates to a kind of antenna, specifically is meant a kind of circular polarization directional antenna that is used for 8 millimeter waves or 3 millimeter wave frequency bands.
Background technology
Existing circular waveguide leaky directional antenna generally is made up of waveguide feed network and numerous waveguide antenna seam (being antenna radiation unit), and itself is linear polarization characteristics antenna.For realizing circular polarization characteristics, the mode of generally taking to add the circular polarization cover above the antenna radiation unit layer realizes.But, when realizing the circular polarization characteristics of millimeter waveguide leaky antenna by this kind mode, go back the following defective of ubiquity: 1, because needs increase the circular polarization cover, so the thickness of antenna will increase, antenna volume also will increase, and its manufacturing cost and debugging cost also can increase; 2, because added circular polarization cover structural relatively poor, so the circular polarization axial ratio of antenna poor (its parameter value has determined the quality of antenna circular polarization characteristics), cause the circular polarization axial ratio unstable properties of antenna easily; 3, increase after the circular polarization cover, not only cause (other) electrical property variation of antenna easily, but also can increase the debugging work load of antenna electric performance.Therefore, adopt the mode that increases the circular polarization cover can not well realize circular polarization characteristics and other performance of millimeter waveguide leaky antenna.
The utility model content
The defective that the volume that the purpose of this utility model is to overcome above-mentioned a kind of directional antenna is big, circular polarization axial ratio performance is unstable and cause other electrical property variation of antenna easily provides a kind of new directional antenna.
The purpose of this utility model is achieved through the following technical solutions: a kind of directional antenna, mainly form by waveguide feed network and the circular polarization radiation elementary layer that is connected with this waveguide feed network.
Further, described circular polarization radiation elementary layer is provided with the circular polarization radiation unit that is vertical, horizontal or criss-cross arrangement more than.
Described circular polarization radiation unit is that a cross section is trapezoidal cavity, and also has a radiating slot in the bottom of this cavity.
In order better to realize the utility model, there is an angle α in the center line of the long central axis of described radiating slot and bottom surface, circular polarization radiation unit, and the value of this angle α is 45 °.
The utility model compared with prior art has the following advantages and beneficial effect:
(1) of the present utility model simple for structure, and can reduce antenna thickness.
(2) structure of the present utility model is very stable, so the axial ratio performance of antenna is highly stable, and is better than existing millimeter wave circular polarization cover.
(3) the utility model is little to other electrical property influence of antenna, can not only effectively improve the overall performance of antenna, and can also further improve rate of finished products, has reduced manufacturing cost.
(4) because antenna axial ratio of the present utility model does not need debugging, therefore there is not debugging radome one thing, its overall manufacturing cost has obvious decline.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present utility model;
Fig. 2 is a circular polarization radiation cellular construction schematic diagram of the present utility model;
Fig. 3 is an A-A cross-sectional view shown in Figure 2;
Fig. 4 is a B-B cross-sectional view shown in Figure 2.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Embodiment
Shown in Fig. 1～4, this practical circular polarization radiation elementary layer 1 is made by metal materials such as metallic aluminium, copper, and its end surface shape is decided according to actual conditions.The waveguide feed network then be arranged on this circular polarization radiation elementary layer 1 below.Circular polarization radiation elementary layer 1 is provided with one and more than one circular polarization radiation unit 3 (being also referred to as the radiation loudspeaker usually).
Described each circular polarization radiation unit 3 caves inward by the end face of radiating element layer 1 or is processed to form the cavity of a rule, and the cross section of this cavity is trapezoidal (also claiming trumpet type).Simultaneously, also be provided with in the bottom of this cavity be used for signal from the waveguide feed network to 3 transmission of circular polarization radiation unit, and the radiating slot 4 of rectangular shape, and the two ends of this radiating slot 4 are semi arch.As required, there is an angle α in the center line of the long central axis of described radiating slot 4 and 3 bottom surfaces, circular polarization radiation unit.And the best value of this angle α is 45 °.
As mentioned above, just can realize the utility model preferably.
Claims (6)
1. a directional antenna is characterized in that, mainly is made up of waveguide feed network and the circular polarization radiation elementary layer (1) that is connected with this waveguide feed network.
2. a kind of directional antenna according to claim 1 is characterized in that, described circular polarization radiation elementary layer (1) is provided with more than one circular polarization radiation unit (3).
3. a kind of directional antenna according to claim 2 is characterized in that, described circular polarization radiation unit (3) is a cavity, and also has a radiating slot (4) in the bottom of this cavity.
4. a kind of directional antenna according to claim 3 is characterized in that, the cross section of described cavity is trapezoidal.
5. a kind of directional antenna according to claim 3 is characterized in that, there is an angle α in the center line of the long central axis of described radiating slot (4) and bottom surface, circular polarization radiation unit (3).
6. a kind of directional antenna according to claim 5 is characterized in that, the value of described angle α is 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200831438U CN201490339U (en) | 2009-08-05 | 2009-08-05 | Directional antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200831438U CN201490339U (en) | 2009-08-05 | 2009-08-05 | Directional antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201490339U true CN201490339U (en) | 2010-05-26 |
Family
ID=42429207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200831438U Expired - Fee Related CN201490339U (en) | 2009-08-05 | 2009-08-05 | Directional antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201490339U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111799547A (en) * | 2020-05-29 | 2020-10-20 | 安徽四创电子股份有限公司 | Circularly polarized waveguide slot antenna |
-
2009
- 2009-08-05 CN CN2009200831438U patent/CN201490339U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111799547A (en) * | 2020-05-29 | 2020-10-20 | 安徽四创电子股份有限公司 | Circularly polarized waveguide slot antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20170805 |