CN206850013U - A kind of lens load circular polarization electromagnetic horn - Google Patents
A kind of lens load circular polarization electromagnetic horn Download PDFInfo
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- CN206850013U CN206850013U CN201720695061.3U CN201720695061U CN206850013U CN 206850013 U CN206850013 U CN 206850013U CN 201720695061 U CN201720695061 U CN 201720695061U CN 206850013 U CN206850013 U CN 206850013U
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- 230000010287 polarization Effects 0.000 title claims abstract description 34
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- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920007962 Styrene Methyl Methacrylate Polymers 0.000 description 1
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- 230000010365 information processing Effects 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
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Abstract
The utility model discloses a kind of lens load circular polarization electromagnetic horn, including：Antenna body, di-lens, circular polarisation piece, radio frequency connector, back shroud；Wherein, antenna body axis direction is provided with the through hole of up/down perforation, and through hole top is the horn-like structure opened upward, and through hole bottom is waveguiding structure；Di-lens is fixed on antenna body upper end perpendicular to the axis of through hole, corresponding with horn-like locations of structures；Circular polarisation piece is fixed in the waveguiding structure of through hole bottom；Radio frequency connector is arranged on the position that antenna body side corresponds to through hole bottom waveguiding structure, and penetrates antenna body side wall, the waveguiding structure of insertion through hole bottom；Back shroud is installed on the lower surface of antenna body.For antenna by loaded medium lens and circular polarisation piece, bandwidth of its standing-wave ratio less than 2 reaches 18% in the utility model, in ± 5 ° gain reach more than 14dBi, center frequency point axle ratio is less than 4, and antenna possesses left-hand circular polarization characteristic；Meet the requirement of aircraft.
Description
Technical Field
The utility model belongs to the communication system field, concretely relates to lens loading circular polarization horn antenna.
Background
The cooperative reconnaissance interference system has the main function of reconnaissance of enemy radar information, controls the interference machine to transmit signals to interfere the enemy radar after information processing, ensures that the missile is not found by the enemy radar during normal flight, and provides a barrier function for normal flight of the missile.
The cooperative reconnaissance interference system comprises a main station channel and four multifunctional distributed interference machines. Information is exchanged between the main station channel and each jammer, and the jammers have the functions of interference and reconnaissance.
The main station communication antenna is responsible for the signal transceiving function between the main station and each jammer, and the distance between the main station channel and each jammer is tens of kilometers, so the power coverage of the main station beam to the four distributed jammers is considered fully in selection, the antenna needs to have enough gain within a certain angle, and the higher the gain, the better the gain. In addition, considering the system communication requirements, the circularly polarized antenna can effectively inhibit the influence of multipath and directional diagram side lobes, so that the antenna needs to have better circular polarization characteristics.
SUMMERY OF THE UTILITY MODEL
To the above defect or the improvement demand of prior art, the utility model aims at providing an antenna that high gain, high coverage, circular polarization characteristic are good.
In order to achieve the above object, the utility model provides a lens loading circular polarization horn antenna, include: the antenna comprises an antenna body, a dielectric lens, a circularly polarized sheet, a radio frequency connector and a rear cover plate; wherein,
the antenna main body is used for electromagnetic wave radiation and reception, a through hole which is communicated up and down is arranged along the axis direction of the antenna main body, the upper part of the through hole is of an upward-opened horn-shaped structure, and the lower part of the through hole is of a waveguide structure;
the dielectric lens is vertical to the axis of the through hole, is fixed at the upper end of the antenna main body and corresponds to the position of the horn-shaped structure;
the circular polarization piece is fixed in the waveguide structure at the lower part of the through hole;
the radio frequency connector is arranged at the position of the side surface of the antenna body corresponding to the waveguide structure at the lower part of the through hole, penetrates through the side wall of the antenna body and is inserted into the waveguide structure at the lower part of the through hole;
the rear cover plate is mounted on the lower end face of the antenna main body.
Furthermore, the dielectric lens is fixed at the upper end of the antenna main body through a plastic support rod and corresponds to the opening surface of the horn-mounted structure; the circularly polarized plate is fixed inside the waveguide through a fastening screw on the side surface and is arranged parallel to the axis of the through hole.
Furthermore, the fastening screw is thin at the front end, free of threads, thick at the rear end, threaded, installed on two sides of the antenna body, inserted into the through hole of the antenna body and in threaded fit with the side wall of the antenna body, and the circularly polarized sheet is tightly propped against the front end.
Further, the circular polarization plate is a high-frequency dielectric plate, and the arrangement angle of the circular polarization plate is 45 degrees counterclockwise relative to the position of the feed connector when viewed from one side of the horn-shaped structure.
Further, the radio frequency connector is a standard SSMA connector.
Furthermore, the inner wall of the waveguide structure is provided with a slot for preliminarily positioning the circular polarization piece, two sides of the antenna main body are respectively provided with a fastening screw, and the front ends of the two fastening screws clamp the circular polarization piece.
Furthermore, the overall size of the antenna main body, the dielectric lens, the circular polarization piece, the radio frequency connector and the rear cover plate after combination is less than 30mm multiplied by 50 mm.
Furthermore, the middle parts of two sides of the antenna main body are provided with support lug type structures.
Generally, the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect:
1) the antenna has high gain and good circular polarization performance, the band width with the standing-wave ratio of less than 2 can reach 18 percent, the gain in +/-5 degrees can reach more than 14dBi, the axial ratio of a central frequency point is less than 4, and the antenna has the left-hand circular polarization characteristic;
2) the utility model discloses in through the overall arrangement of reasonable optimization each part for the overall structure size diminishes, and the space that reduces greatly occupies.
3) The antenna mechanical properties is good, the utility model discloses a purpose-built fastening screw passes the outer wall at the fixed circular polarization piece in middle part, fixes whole structure through the screw at the middle part, through plastics screw thread and pillar weight reduction to through mechanics emulation, weakened the resonance possibility of antenna under abominable mechanical environment greatly.
4) The antenna feed system adopts the radio frequency connector to carry out 'coaxial waveguide-to-waveguide' feed, realizes the circular polarization characteristic of the antenna through the circular polarization piece, has simple structure and good consistency, can increase the impedance bandwidth of the antenna array, and is beneficial to the realization of the antenna.
Drawings
FIG. 1 is a perspective view of a preferred embodiment of the present invention;
FIG. 2 is a cross-sectional view of a preferred embodiment of the invention;
fig. 3 is a top view of a preferred embodiment of the present invention;
fig. 4(a) (b) is a front view and a side view of a circular polarization plate according to a preferred embodiment of the present invention;
fig. 5(a) (b) are a top view and a front view of a dielectric lens according to a preferred embodiment of the present invention.
In the present invention, the same reference numerals denote the same structures, wherein:
1-dielectric lens, 2-support rod, 3-circular polarization piece, 4-fastening screw, 5-radio frequency connector, 6-antenna body and 7-back cover plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
The utility model discloses a lens loading circular polarization horn antenna structure is shown in figure 1, include: the antenna comprises a dielectric lens 1, a support rod 2, a circular polarization piece 3, a fastening screw 4, a radio frequency connector 5, an antenna body 6 and a rear cover plate 7.
The dielectric lens 1 is fixed on the antenna body 6 through the support rod 2 and used for beam bunching of an antenna pattern. The circularly polarized plate 3 is fixed inside the antenna body 6 through an inner groove of the antenna body 6 and further fixed through a fastening screw 4 for realizing circular polarization in an antenna frequency band, the radio frequency connector 5 is installed on the outer wall of the antenna body 6, and the rear cover plate is installed at the rear of the antenna for realizing feeding of the antenna.
As shown in FIG. 3, the dielectric lens is made of polytetrafluoroethylene with a dielectric constant of 2.2, and preferably has a size of 30mm × 30mm × 6mm, and the curve of the dielectric lens is preferably X2-(Y-M)2＝676。
In this embodiment, the antenna is preferably fed by a 50 Ω matching SMMA type connector, and in order to match the rf connector with the waveguide and the horn and increase the antenna feed bandwidth, the length of the center conductor of the rf connector extending out of the inner surface of the structural member is preferably 4.1mm, the diameter is preferably 1.3mm, and the length of the rf connector from the back cover plate is preferably 9.7 mm.
The horn mouth surface is fed through the waveguide port, in order to guarantee the left-handed circular polarization characteristic, a circular polarization piece is added in the middle of the antenna, the circular polarization piece is made of TP-2 composite dielectric materials with the dielectric constant of 9.6, the size is preferably 15.5mm multiplied by 13mm, and the thickness is preferably 2 mm.
The antenna comprises an antenna main body, a radiating part and a radiating part, wherein the antenna main body comprises a circular waveguide structure and a horn structure which gradually opens at a certain angle and is used for electromagnetic wave radiation and reception;
and a circular polarization plate, which is a high frequency dielectric plate installed inside at an angle of 45 ° compared to the installation angle of the feed connector, having a size close to a rhombus for converting the TM10 mode into the TE11 mode to realize the circular polarization characteristic of the antenna. As shown in fig. 4(a) (b), as an improvement of the present invention, the circular polarization piece has a rhomboid shape formed by rectangular corner cut, and the difference between the angle of the circular polarization piece and the angle of the radio frequency connector is 45 ° (counterclockwise) when viewed from the horn-shaped face. The circular polarization piece is initially positioned through the inner wall grooving and then fixed through the fastening screws on two sides, so that the circular polarization piece cannot fall off under a high vibration magnitude.
The radio frequency connector is a standard SSMA connector and comprises a flange with four mounting holes, a part of polytetrafluoroethylene medium and an extended inner conductor, wherein the radio frequency connector is arranged on one side and is used for converting a TEM mode transmitted by a coaxial cable into a TM10 mode propagated by a circular waveguide and used for feeding an antenna;
a fastening screw, characterized in that the front part is thin without thread and the rear part is thick with thread, installed at both sides, for fastening the circular polarization plate;
and the dielectric lens is arranged above the antenna aperture surface and used for focusing beams and improving the gain of the antenna. As shown in fig. 5(a) (b), as the improvement of the present invention, the dielectric lens is a curve structure with a special function to adapt to the beam-focusing requirement of the electromagnetic wave in the frequency band. The dielectric lens is fixed at a position away from the horn mouth face through the plastic screw and the plastic support rod, and therefore the influence of the metal screw on antenna radiation is effectively prevented.
And the rear cover plate is arranged at the rear part of the antenna main body and forms a coaxial waveguide rotating part together with the radio frequency connector and the antenna main body.
As the improvement of the utility model, the whole size of the antenna is less than 30mm multiplied by 50 mm. The antenna is fixed through the lug type structures of which the two sides are positioned in the middle, so that the size of the antenna can be effectively reduced, and the occurrence of resonance phenomenon is reduced. The radio frequency connector passes through the blind threaded hole through 4 screws to be fixed, and the performance of the antenna is not influenced while the radio frequency connector is fixed. The rear cover plate is fixed through 8 screws, so that signal leakage is effectively prevented, and the electromagnetic compatibility of the antenna is improved.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A lens-loaded circularly polarized feedhorn, comprising: the antenna comprises an antenna body, a dielectric lens, a circularly polarized sheet, a radio frequency connector and a rear cover plate; wherein,
the antenna main body is used for electromagnetic wave radiation and reception, a through hole which is communicated up and down is arranged along the axis direction of the antenna main body, the upper part of the through hole is of an upward-opened horn-shaped structure, and the lower part of the through hole is of a waveguide structure;
the dielectric lens is vertical to the axis of the through hole, is fixed at the upper end of the antenna main body and corresponds to the position of the horn-shaped structure;
the circular polarization piece is fixed in the waveguide structure at the lower part of the through hole;
the radio frequency connector is arranged at the position of the side surface of the antenna body corresponding to the waveguide structure at the lower part of the through hole, penetrates through the side wall of the antenna body and is inserted into the waveguide structure at the lower part of the through hole;
the rear cover plate is mounted on the lower end face of the antenna main body.
2. The lens-loaded circularly polarized feedhorn of claim 1, wherein the dielectric lens is fixed to the upper end of the antenna body by a plastic support rod corresponding to the open face of the horn-shaped structure; the circularly polarized plate is fixed inside the waveguide through a fastening screw on the side surface and is arranged parallel to the axis of the through hole.
3. The lens-loaded circularly polarized horn antenna of claim 2, wherein the fastening screws have a thin front end, no thread, a thick rear end, and a thread, are mounted on both sides of the antenna body, are inserted into the through holes of the antenna body and are in threaded engagement with the side walls of the antenna body, and have front ends for abutting against the circularly polarized plate.
4. A lens-loaded circularly polarized feedhorn according to any one of claims 1 to 3 wherein the circularly polarized patch is a high frequency dielectric patch and the circularly polarized patch is disposed at an angle of 45 ° counterclockwise with respect to the position of the feed connector when viewed from the horn-like structure side.
5. A lens-loaded circularly polarized horn antenna according to any of claims 1-3 wherein the rf connector is a standard SSMA connector.
6. The lens-loaded circularly polarized horn antenna of any one of claims 1 to 3, wherein the waveguide structure has a slot on its inner wall for initially positioning the circularly polarized plate, and wherein the antenna body has two fastening screws on each side, and the front ends of the two fastening screws clamp the circularly polarized plate.
7. The lens-loaded circularly polarized horn antenna of any one of claims 1 to 3, wherein the overall size of the antenna body, the dielectric lens, the circularly polarized plate, the RF connector and the back cover plate is less than 30mm x 50 mm.
8. The lens-loaded circularly polarized feedhorn of any one of claims 1 to 3, wherein the antenna body has a lug-shaped structure in the middle of its two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720695061.3U CN206850013U (en) | 2017-06-15 | 2017-06-15 | A kind of lens load circular polarization electromagnetic horn |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720695061.3U CN206850013U (en) | 2017-06-15 | 2017-06-15 | A kind of lens load circular polarization electromagnetic horn |
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| CN206850013U true CN206850013U (en) | 2018-01-05 |
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| CN201720695061.3U Active CN206850013U (en) | 2017-06-15 | 2017-06-15 | A kind of lens load circular polarization electromagnetic horn |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109830801A (en) * | 2019-03-29 | 2019-05-31 | 中国电子科技集团公司第二十九研究所 | A kind of antenna integrated unit of efficient circular polarisation and its working method |
| CN113497332A (en) * | 2020-04-02 | 2021-10-12 | 深圳市威富通讯技术有限公司 | Multi-channel high-gain WIFI signal transceiving device |
| CN113517539A (en) * | 2020-04-10 | 2021-10-19 | 深圳市威富通讯技术有限公司 | Three-dimensional high-gain radio frequency front-end device |
| CN113555670A (en) * | 2020-04-01 | 2021-10-26 | 深圳市威富通讯技术有限公司 | Multichannel wireless signal transceiver |
-
2017
- 2017-06-15 CN CN201720695061.3U patent/CN206850013U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109830801A (en) * | 2019-03-29 | 2019-05-31 | 中国电子科技集团公司第二十九研究所 | A kind of antenna integrated unit of efficient circular polarisation and its working method |
| CN113555670A (en) * | 2020-04-01 | 2021-10-26 | 深圳市威富通讯技术有限公司 | Multichannel wireless signal transceiver |
| CN113497332A (en) * | 2020-04-02 | 2021-10-12 | 深圳市威富通讯技术有限公司 | Multi-channel high-gain WIFI signal transceiving device |
| CN113517539A (en) * | 2020-04-10 | 2021-10-19 | 深圳市威富通讯技术有限公司 | Three-dimensional high-gain radio frequency front-end device |
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