CN203180085U - Fully folding cylindrical four arm spiral antenna - Google Patents
Fully folding cylindrical four arm spiral antenna Download PDFInfo
- Publication number
- CN203180085U CN203180085U CN 201320175160 CN201320175160U CN203180085U CN 203180085 U CN203180085 U CN 203180085U CN 201320175160 CN201320175160 CN 201320175160 CN 201320175160 U CN201320175160 U CN 201320175160U CN 203180085 U CN203180085 U CN 203180085U
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- radiation metal
- cylindrical
- bar
- metal bar
- spiral antenna
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Abstract
The utility model discloses a fully folding cylindrical four arm spiral antenna, including a cylindrical substrate, a signal input terminal and radiation metal strips spirally adhered to the surface of the cylindrical substrate. Head ends of the four radiation metal strips are arranged at one end face of the cylindrical substrate, wherein the head ends of the two radiation metal strips are connected with one end of the signal input terminal, and the head ends of the other two radiation metal strips are connected with the other end of the signal input terminal. Each radiation metal strip is folded at the middle point to form an upper segment and a lower segment. The upper segment and the lower segment of each radiation metal strip are spirally adhered to the surface of the cylindrical substrate in parallel with a same distance. The length of the fully folding cylindrical four arm spiral antenna is increased exponentially by folding the radiation metal strips, and by the mutual coupling between the upper segments and the lower segments of the radiation metal strips, the impedance matching characteristics of the antenna are improved, so that the working frequency bandwidth of the fully folding cylindrical four arm spiral antenna is significantly increased, and the requirement of high bandwidth covering multiple positioning systems is met.
Description
Technical field
The utility model relates to a kind of cylindrical four-arm spiral antenna, relates in particular to a kind of cylindrical four-arm spiral antenna of full folding type of high-band bandwidth.
Background technology
The miniaturization of antenna refers to reduce the size of antenna and keep a kind of measure that its radiation characteristic is basic and designing requirement originally conforms in fixing operating frequency.Along with developing rapidly of mobile communication, the method for different miniaturizations is arranged at different antenna type (revolving antenna and printed microstrip antennas etc. as wire antenna, planar inverted reason antenna, medium resonator antenna, slot antenna, behaviour).
Since KILGUS proposes the resonant mode four-arm spiral antenna in nineteen sixty-eight, and with the methods analyst of two quadrature loop dipoles equivalence its operation principle, the resonant mode four-arm spiral antenna just has been subjected to researcher and user's general liking.Miniaturization, broad beam and broadband are the research directions of four-arm spiral antenna always.
The matrix of four-arm spiral antenna has multiple shape, as cylindrical, taper, square etc., all there is a problem in these traditional four-arm spiral antennas, be exactly that the working band bandwidth is narrower, usually has only 5%-8%, be difficult to cover multiple navigation system such as GPS, GLONASS and GALILEO etc., restricted the development of miniaturization helix antenna.
The utility model content
The purpose of this utility model just is to provide in order to address the above problem a kind of cylindrical four-arm spiral antenna of full folding type of high-band bandwidth.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The cylindrical four-arm spiral antenna of full folding type described in the utility model, comprise that cylindrical base, signal input part and spirality place the radiation metal bar on described cylindrical base surface, article four, the head end of radiation metal bar all places on the end end face of described cylindrical base, wherein the head end of two radiation metal bars is connected with an end of described signal input part, and the head end of two other radiation metal bar is connected with the other end of described signal input part; The described radiation metal bar of each bar forms epimere and hypomere along mid point bending back, and the mutually equidistant side-by-side helix shape of the epimere of the described radiation metal bar of each bar and hypomere places the surface of described cylindrical base.
As preferably, the epimere of the described radiation metal bar of each bar and the spacing between the hypomere be between the epimere of adjacent two described radiation metal bars spacing 1/1/4th～two; The best is 1/3rd.
Particularly, described radiation metal bar is filled in the groove on described cylindrical base surface or directly is attached to the surface of described cylindrical base.
As preferably, described radiation metal bar is copper bar or aluminum strip.
The beneficial effects of the utility model are:
The utility model is multiplied its length by folding radiation metal bar, and by the epimere of radiation metal bar and the mutual coupling between the hypomere, improved the impedance matching property of antenna, the working band bandwidth of the cylindrical four-arm spiral antenna of the utility model full folding type is significantly improved, satisfied the high bandwidth requirement that covers many navigation systems.
Description of drawings
Fig. 1 is the stereogram of the cylindrical four-arm spiral antenna of full folding type described in the utility model;
Fig. 2 is the expanded view of the cylindrical base of the cylindrical four-arm spiral antenna of full folding type described in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As depicted in figs. 1 and 2, the cylindrical four-arm spiral antenna of full folding type described in the utility model comprises cylindrical base 1, signal input part 2 and spirality place the radiation metal bar on the surface of cylindrical base 1, totally four of radiation metal bars, be respectively the first radiation metal bar 8, the second radiation metal bar 9, the 3rd radiation metal bar 10, the 4th radiation metal bar 11, article four, the head end of radiation metal bar (upper end among Fig. 1) all places on the end end face of cylindrical base 1, wherein, the head end 4 of the first radiation metal bar 8 is connected with an end of signal input part 2 with the head end 5 of the second radiation metal bar 9, and the head end 6 of the 3rd radiation metal bar 10 is connected with the other end of signal input part 2 with the head end 7 of the 4th radiation metal bar 11; Each bar radiation metal bar forms epimere and hypomere along mid point bending back, the epimere of each bar radiation metal bar and hypomere mutually equidistant side-by-side helix shape place the surface of cylindrical base 1, the epimere of each bar radiation metal bar and the spacing between the hypomere be between the epimere of adjacent two described radiation metal bars spacing 1/3rd.Also show the signal input line 3 that cylindrical base 1 other end is lower end among Fig. 1 among Fig. 1, signal input line 3 passes from the inside of cylindrical base 1.
According to the difference of practical application, the radiation metal bar can be filled in the groove on surface of cylindrical base 1, also can directly be attached to the surface of cylindrical base 1; The radiation metal bar can adopt copper bar or aluminum strip.
As depicted in figs. 1 and 2, the signal that needs to send is transferred to signal input part 2 through signal input line 3, and transfer to one group of antenna element that the first radiation metal bar 8 and the second radiation metal bar 9 are formed respectively, and the 3rd one group of antenna element forming of radiation metal bar 10 and the 4th radiation metal bar 11, realize the emission of signal.
Claims (5)
1. cylindrical four-arm spiral antenna of full folding type, comprise that cylindrical base, signal input part and spirality place the radiation metal bar on described cylindrical base surface, article four, the head end of radiation metal bar all places on the end end face of described cylindrical base, wherein the head end of two radiation metal bars is connected with an end of described signal input part, and the head end of two other radiation metal bar is connected with the other end of described signal input part; It is characterized in that: the described radiation metal bar of each bar forms epimere and hypomere along mid point bending back, and the mutually equidistant side-by-side helix shape of the epimere of the described radiation metal bar of each bar and hypomere places the surface of described cylindrical base.
2. the cylindrical four-arm spiral antenna of full folding type according to claim 1 is characterized in that: the epimere of the described radiation metal bar of each bar and the spacing between the hypomere be between the epimere of adjacent two described radiation metal bars spacing 1/1/4th～two.
3. the cylindrical four-arm spiral antenna of full folding type according to claim 2 is characterized in that: the epimere of the described radiation metal bar of each bar and the spacing between the hypomere be between the epimere of adjacent two described radiation metal bars spacing 1/3rd.
4. according to claim 1, the cylindrical four-arm spiral antenna of 2 or 3 described full folding types, it is characterized in that: described radiation metal bar is filled in the groove on described cylindrical base surface or directly is attached to the surface of described cylindrical base.
5. according to claim 1, the cylindrical four-arm spiral antenna of 2 or 3 described full folding types, it is characterized in that: described radiation metal bar is copper bar or aluminum strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320175160 CN203180085U (en) | 2013-04-09 | 2013-04-09 | Fully folding cylindrical four arm spiral antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320175160 CN203180085U (en) | 2013-04-09 | 2013-04-09 | Fully folding cylindrical four arm spiral antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203180085U true CN203180085U (en) | 2013-09-04 |
Family
ID=49076745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320175160 Expired - Fee Related CN203180085U (en) | 2013-04-09 | 2013-04-09 | Fully folding cylindrical four arm spiral antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203180085U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108889880A (en) * | 2018-06-15 | 2018-11-27 | 北京航天光华电子技术有限公司 | A kind of helical antenna molding machine |
| CN113131200A (en) * | 2021-04-21 | 2021-07-16 | 广东工业大学 | Omnidirectional circularly polarized spiral antenna with folding structure |
-
2013
- 2013-04-09 CN CN 201320175160 patent/CN203180085U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108889880A (en) * | 2018-06-15 | 2018-11-27 | 北京航天光华电子技术有限公司 | A kind of helical antenna molding machine |
| CN113131200A (en) * | 2021-04-21 | 2021-07-16 | 广东工业大学 | Omnidirectional circularly polarized spiral antenna with folding structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20140409 |