CN214254727U - Coaxial feed double-arm helical antenna - Google Patents
Coaxial feed double-arm helical antenna Download PDFInfo
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- CN214254727U CN214254727U CN202023181268.XU CN202023181268U CN214254727U CN 214254727 U CN214254727 U CN 214254727U CN 202023181268 U CN202023181268 U CN 202023181268U CN 214254727 U CN214254727 U CN 214254727U
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- 239000002184 metal Substances 0.000 claims abstract description 22
- 239000004020 conductor Substances 0.000 claims abstract description 15
- 239000004065 semiconductor Substances 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 2
- 238000004804 winding Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model relates to a coaxial feed double-arm helical antenna, which comprises a reflecting plate, a coaxial connector and a semi-rigid cable, wherein the coaxial connector is fixed on the reflecting plate, one end of the semi-rigid cable is connected with the coaxial connector, and the other end of the semi-rigid cable is provided with a balun structure for realizing electric balance; the balun structure comprises a metal sleeve sleeved at the end part of the semi-rigid cable, the end part of the metal sleeve is welded with the outer conductor of the semi-rigid cable, the outer conductor is not arranged at the section where the semi-rigid cable is sleeved with the metal sleeve, and two balun grooves are symmetrically formed in the metal sleeve to divide the metal sleeve into a left semiconductor and a right semiconductor; the insulation cylinder outside the semi-rigid cable is located to the cover fixed being equipped with on the reflecting plate, the winding has the both arms helical antenna who is connected with the balun structure on the insulation cylinder, and the left arm and the left semiconductor of both arms helical antenna are connected, and the right arm is connected with the inner conductor of right semi-conductor and semi-rigid cable, and this application has simple structure and reliable effect.
Description
Technical Field
The utility model belongs to the technical field of the antenna, especially, relate to a coaxial feed both arms helical antenna.
Background
With the rapid development of satellite wireless communication navigation industry, satellite communication systems play an increasingly important role in human life, and more countries begin to develop their own satellite navigation systems. Because satellites of various navigation communication systems are limited in spatial distribution, in a satellite navigation communication system with a low information rate and a small capacity, an antenna of a terminal used in the satellite navigation communication system is required to have a small size, low loss, polarization of circular polarization, wide pitch heating, and an omnidirectional azimuth pattern. Although the single-arm helical antenna and the quadrifilar helical antenna are frequently used, the dual-arm antenna is more adopted in communication satellite navigation at present because the gain of the single-arm helical antenna is 2dB lower than that of the dual-arm helical antenna, the quadrifilar helical antenna requires that the feed difference of each of the four arms is 90 degrees, and the feed network is complex, namely the structure is much more complex than that of the single arm and the dual arms.
The existing double-arm spiral adopts the mode that a spiral line is printed on a printed board and a feed network is adopted for feeding and feeding interfaces, but a special feed network is required to be adopted, so that the structure is complex.
SUMMERY OF THE UTILITY MODEL
The utility model has the advantages of simple structure and reliability.
In order to solve the problems in the background art, the utility model discloses a realize through following technical scheme:
a coaxial feed double-arm helical antenna comprises a reflecting plate, a coaxial connector and a semi-rigid cable, wherein the coaxial connector is fixed on the reflecting plate, one end of the semi-rigid cable is connected with the coaxial connector, and the other end of the semi-rigid cable is provided with a balun structure for realizing electric balance;
an insulating column body sleeved outside the semi-rigid cable is fixed on the reflecting plate, and a double-arm spiral antenna connected with the balun structure is wound on the insulating column body.
As a further explanation of the utility model: the balun structure comprises a metal sleeve sleeved at the end part of the semi-rigid cable, the end part of the metal sleeve is welded with an outer conductor of the semi-rigid cable, the sleeved section of the semi-rigid cable and the metal sleeve is not provided with the outer conductor, and the metal sleeve is symmetrically provided with two balun grooves so as to divide the metal sleeve into a left semiconductor and a right semiconductor;
and the left arm of the double-arm spiral antenna is connected with the left semiconductor, and the right arm of the double-arm spiral antenna is connected with the right semi-conductor and the inner conductor of the semi-rigid cable.
As a further explanation of the utility model: the length of the balun groove is 1/4 wavelengths.
As a further explanation of the utility model: and a wire groove is arranged on the insulating column body corresponding to the double-arm spiral antenna.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a combination of semi-rigid cable and balun structure has realized coaxial feed and the unbalanced-electric balance conversion of electricity, replaces the feed network through the balun structure promptly, has reached when realizing electric balance, simple structure, reliable purpose, changes in batch production like this.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a cross-sectional view of the overall structure of the present invention;
fig. 3 is a schematic view of a part of the structure of the present invention.
1. A reflective plate; 11. a coaxial connector; 2. a semi-rigid cable; 21. an outer conductor; 22. an insulator; 23. an inner conductor; 24. a metal sleeve; 25. a balun groove; 3. an insulating cylinder; 31. a bifilar helical antenna; 4. a pole bracket; 5. a radome.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-3, a coaxial feed dual-arm helical antenna includes a reflection plate 1, a coaxial connector 11 and a semi-rigid cable 2, the coaxial connector 11 is fixed on the reflection plate 1, one end of the semi-rigid cable 2 is connected with the coaxial connector 11, and the other end is provided with a balun structure for realizing electrical balance; specifically, the balun structure includes a metal sleeve 24 sleeved on an end portion of the semi-rigid cable 2, the end portion of the metal sleeve 24 is welded to the outer conductor 21 of the semi-rigid cable 2, the outer conductor 21 is not disposed on a section where the semi-rigid cable 2 is sleeved on the metal sleeve 24, and in this embodiment, an inner diameter of the metal sleeve 24 is matched with an outer diameter of the insulator 22 of the semi-rigid cable 2.
Two balun grooves 25 are symmetrically formed in the metal sleeve 24 to divide the metal sleeve 24 into a left semiconductor and a right semiconductor, wherein the length of each balun groove 25 is 1/4 wavelengths.
An insulating cylinder 3 sleeved outside the semi-rigid cable 2 is fixed on the reflecting plate 1, a double-arm spiral antenna 31 is wound on the insulating cylinder 3, a wire groove is formed in the insulating cylinder 3 corresponding to the double-arm spiral antenna 31, the double-arm spiral antenna 31 is welded in the wire groove to achieve the purpose of the double-arm spiral antenna 31, the left arm of the double-arm spiral antenna 31 is connected with the left semiconductor, the right arm of the double-arm spiral antenna 31 is connected with the right half conductor and the inner conductor 23 of the semi-rigid cable 2 to form a section of 1/4 wavelength transmission line with a short circuit at the end, and therefore the purpose of balanced feeding is achieved; in the present embodiment, the two-arm helical antenna 31 uses a 2.0mm wire.
The insulating cylinder 3 is covered with an antenna cover 5 fixed to the reflector plate 1 to improve the beauty of the coaxial feed bifilar helical antenna 31 and protect the internal parts of the coaxial feed bifilar helical antenna 31.
A derrick support 4 is fixed to the reflector 1 to facilitate mounting the coaxial feed bifilar helical antenna 31 to a desired position.
The utility model discloses a theory of operation does: the combination of the semi-rigid cable and the balun structure is adopted to realize coaxial feed and electric unbalance-electric balance conversion, namely, the balun structure is used for replacing a feed network, so that the purposes of realizing electric balance and simultaneously having simple and reliable structure are achieved, and the mass production is easier.
The embodiments given above are preferred examples for implementing the present invention, and the present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical features of the technical solution of the present invention by those skilled in the art all belong to the protection scope of the present invention.
Claims (4)
1. A coaxial feed two-arm helical antenna, characterized in that: the reflecting plate comprises a reflecting plate (1), a coaxial connector (11) and a semi-rigid cable (2), wherein the coaxial connector (11) is fixed on the reflecting plate (1), one end of the semi-rigid cable (2) is connected with the coaxial connector (11), and the other end of the semi-rigid cable is provided with a balun structure for realizing electric balance;
an insulating cylinder (3) sleeved outside the semi-rigid cable (2) is fixed on the reflecting plate (1), and a double-arm spiral antenna (31) connected with a balun structure is wound on the insulating cylinder (3).
2. A coaxial fed bifilar helical antenna as claimed in claim 1, wherein: the balun structure comprises a metal sleeve (24) sleeved at the end part of the semi-rigid cable (2), the end part of the metal sleeve (24) is welded with an outer conductor (21) of the semi-rigid cable (2), the outer conductor (21) is not arranged at one section of the sleeved semi-rigid cable (2) and the metal sleeve (24), and two balun grooves (25) are symmetrically formed in the metal sleeve (24) to divide the metal sleeve (24) into a left semiconductor and a right semiconductor; the left arm of the double-arm spiral antenna (31) is connected with the left semiconductor, and the right arm of the double-arm spiral antenna is connected with the right semi-conductor and the inner conductor (23) of the semi-rigid cable (2).
3. A coaxial fed bifilar helical antenna as claimed in claim 2, wherein: the length of the balun groove (25) is 1/4 wavelengths.
4. A coaxial fed bifilar helical antenna as claimed in claim 1, wherein: and a wire groove is formed in the insulating column (3) corresponding to the double-arm spiral antenna (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023181268.XU CN214254727U (en) | 2020-12-25 | 2020-12-25 | Coaxial feed double-arm helical antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023181268.XU CN214254727U (en) | 2020-12-25 | 2020-12-25 | Coaxial feed double-arm helical antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214254727U true CN214254727U (en) | 2021-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023181268.XU Active CN214254727U (en) | 2020-12-25 | 2020-12-25 | Coaxial feed double-arm helical antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN214254727U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114256615A (en) * | 2021-12-24 | 2022-03-29 | 中国航天科工集团八五一一研究所 | Low RCS conformal planar helical antenna based on flexible printed board and design method thereof |
| CN115693106A (en) * | 2022-11-10 | 2023-02-03 | 星启空间(南通)通信设备有限公司 | A satellite and satellite antenna |
-
2020
- 2020-12-25 CN CN202023181268.XU patent/CN214254727U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114256615A (en) * | 2021-12-24 | 2022-03-29 | 中国航天科工集团八五一一研究所 | Low RCS conformal planar helical antenna based on flexible printed board and design method thereof |
| CN115693106A (en) * | 2022-11-10 | 2023-02-03 | 星启空间(南通)通信设备有限公司 | A satellite and satellite antenna |
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