CN210430112U - Satellite-borne miniaturized U-band circularly polarized antenna - Google Patents
Satellite-borne miniaturized U-band circularly polarized antenna Download PDFInfo
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- CN210430112U CN210430112U CN201921558009.9U CN201921558009U CN210430112U CN 210430112 U CN210430112 U CN 210430112U CN 201921558009 U CN201921558009 U CN 201921558009U CN 210430112 U CN210430112 U CN 210430112U
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Abstract
The utility model relates to a satellite-borne miniaturized U wave band circular polarized antenna. Two paths of signals with 90-degree phase difference generated by the feed network excite the antenna radiation sheet, so that the antenna has circularly polarized radiation performance; the grounded L-shaped metal column is adopted to carry out coupling loading on the radiating sheet, so that the size of the antenna can be effectively reduced. The whole antenna has small size, low section, novel and simple structure, good impact resistance, vibration resistance, irradiation resistance and thermal stress resistance, and simultaneously has the radiation characteristics of high gain, wide beam and circular polarization.
Description
Technical Field
The utility model relates to an antenna technology field, especially miniaturized, circular polarization's satellite borne antenna technology field.
Background
The U-band wavelength is longer, the size of the antenna is larger, and the realization of the miniaturized, wide-beam and circularly polarized U-band antenna becomes the problem to be solved urgently.
The existing U-band circularly polarized antenna can be realized by a spiral antenna, for example, a UHF-band spiral antenna (application number: CN201720035345.X) in the patent, because of the limitation of the working principle of the spiral antenna, the spiral diameter is at least 0.3 wavelength, the height is generally more than 0.5 wavelength, and the antenna has a large size and is not suitable for a miniaturized mounting platform.
In addition, a plurality of linear polarization antenna arrays are used for achieving circular polarization radiation performance, for example, in a patent 'UHF band stripline feed satellite-borne double circular polarization antenna' (application number: CN201710612082.9), four element antenna arrays are used for achieving circular polarization radiation performance, but the method can only reduce the envelope size in the horizontal direction, the height cannot be reduced, and a feed network is connected with the antenna by cables, so that the installation mode is complex, and the reliability is poor.
The antenna size can be reduced by adopting a microstrip antenna with high dielectric constant, such as "a circularly polarized ceramic antenna based on orthogonal coaxial feed" (application number: CN 201020126832.5). The antenna is reduced in size by means of the high dielectric constant (larger than 20) of the ceramic dielectric, and due to the limitation of the firing process of the high dielectric constant ceramic, the dielectric constant of the antenna is unstable, the debugging difficulty of the antenna is high, and the performance of the antenna is greatly influenced by the environment.
Disclosure of Invention
Technical problem to be solved
To satellite-borne U wave band circular polarized antenna's miniaturized problem, the utility model provides a satellite-borne miniaturized U wave band circular polarized antenna. The antenna has the advantages of small size, low section, novel and simple structure, good impact resistance, vibration resistance, irradiation resistance and thermal stress resistance, and simultaneously has the radiation characteristics of high gain, wide beam and circular polarization.
Technical scheme
A satellite-borne miniaturized U-band circularly polarized antenna is characterized by comprising a radiation piece, a support column, a feed column, an L-shaped column, a dielectric sleeve, a feed network, a base, a bottom cover plate, a radio frequency connector and an antenna housing; the base is a metal structural member with a cavity on the back surface, the support column, the L-shaped column, the dielectric sleeve and the antenna housing are fixed on the front surface of the base, the feed network is fixed in the cavity on the back surface of the feed network, and the bottom cover plate is fixed on the back cavity of the base; the feed network generates two paths of electric signals with equal amplitude and 90-degree phase difference; one end of the feed column is fixed on the radiation sheet, and the other end of the feed column penetrates through the dielectric sleeve and is welded with a circuit of the feed network; the radiation sheet is a plane metal structure with grooves at four corners and is fixed on the base by a plurality of support columns; the L-shaped columns are inverted L-shaped metal structural members and are 4 in number, the bottom ends of the upright parts of the L-shaped columns are fixed on the base, and the bent parts of the L-shaped columns are fixed at the upper ends of the supporting columns at corresponding positions; the radio frequency connector is a coaxial connector, the outer conductor is fixed on the bottom cover plate, and the inner conductor is welded with the feed network circuit.
The support column is a dielectric material cylindrical structure.
The feed network is a printed circuit board.
The dielectric sleeve is a dielectric structural member with an opening and is used for insulating the feed column from the base.
Advantageous effects
The utility model provides a satellite-borne miniaturized U wave band circular polarized antenna, two paths of signals with 90 DEG phase difference generated by a feed network excite an antenna radiation piece, so that the antenna has circular polarized radiation performance; the grounded L-shaped metal column is adopted to carry out coupling loading on the radiating sheet, so that the size of the antenna can be effectively reduced. The whole antenna has small size, low section, novel and simple structure, good impact resistance, vibration resistance, irradiation resistance and thermal stress resistance, and simultaneously has the radiation characteristics of high gain, wide beam and circular polarization. Compared with the prior art, the utility model the advantage lies in:
(1) the utility model adopts the realization mode of coupling loading, realizes the miniaturization and low profile of the antenna, has the overall dimension of only 0.18 lambda multiplied by 0.08 lambda, can meet the installation requirement of a miniaturized installation platform, and reduces the overall envelope dimension;
(2) the utility model discloses the fixed mode of all parts is reliable, simple structure, novelty, and intensity is high, and rigidity is good, has very strong environmental suitability.
(3) The utility model discloses in stable in structure is reliable, have harmonious structural design, antenna work frequency channel can be adjusted wantonly at the certain limit.
Drawings
Fig. 1 is a schematic view of the overall structure of the antenna of the present invention;
FIG. 2 is a graph showing the standing-wave ratio of the antenna port of the present invention;
fig. 3 shows the antenna radiation pattern of the present invention.
The antenna comprises a radiating sheet 1, supporting columns 2, supporting columns 3, a feed column 4, an L-shaped column 5, a dielectric sleeve 6, a feed network 7, a base 8, a bottom cover plate 9, a radio frequency connector and an antenna housing 10.
Detailed Description
The invention will now be further described with reference to the following examples and drawings:
as shown in fig. 1, the utility model provides a miniaturized U wave band circular polarized antenna of satellite-borne, include: the antenna comprises a radiation piece 1, a support column 2, a feed column 3, an L-shaped column 4, a dielectric sleeve 5, a feed network 6, a base 7, a bottom cover plate 8, a radio frequency connector 9 and an antenna housing 10. The radiation sheet 1 and the L-shaped column 4 are integrally fixed by a plurality of support columns 2 fixed on the base 7; one end of the feed column 3 is connected with the radiation sheet 1, and the other end of the feed column penetrates through a medium sleeve 5 fixed on the bottom plate and is welded with a feed network 6; the feed network is arranged in a cavity at the back of the base 7 and used for protecting the bottom cover plate 8; the outer conductor of the radio frequency connector 9 is fixed on the bottom cover plate 8, and the inner conductor is welded with the feed network 6; the radome 10 is fixed to the base 7 for protecting the antenna structure.
The radiation sheet 1 is a slotted planar metal structure; and a plurality of supporting columns 2 are fixed on the base 7, and 2 feeding columns 3 are connected with the radiation sheet 1 to feed the radiation sheet.
The support column 2 is a dielectric material cylindrical structure and is used for fixing the radiation sheet 1 and the L-shaped column 4.
The feed columns 3 are of a metal cylindrical structure, the number of the feed columns is 2, the upper ends of the feed columns are fixed on the radiation pieces 1, and the lower ends of the feed columns penetrate through the dielectric sleeve 5 and are welded with a circuit of the feed network 6.
The L-shaped columns 4 are inverted L-shaped metal structural members and are 4 in number, the bottom ends of the upright parts of the L-shaped columns are fixed on the base 7, and the bent parts of the L-shaped columns are fixed at the upper ends of the supporting columns 2 at corresponding positions.
The dielectric sleeve 5 is a dielectric structural member with an opening, and is used for insulating the feed column 3 from the base 7 and insulating the feed column 3.
The feed network 6 is a printed circuit board and is fixed in the cavity at the back of the base 7 to generate two paths of electric signals with equal amplitude and 90-degree phase difference.
The base 7 is the metal structure spare of back area cavity, support column 2L shape post 3 medium cover 5 with antenna house 10 is fixed at its front, feed network 6 is fixed in its back cavity, end cover plate 8 is fixed on the base 7 back cavity, be used for protecting feed network 6.
The radio frequency connector 9 is a coaxial connector, an outer conductor of the radio frequency connector is fixed on the bottom cover plate 8, and an inner conductor of the radio frequency connector is welded with the feed network 6 in a circuit mode.
The antenna housing 10 is made of a high-strength and high-wave-transmittance dielectric material and fixed on the base 7, so that the antenna structure is protected while the performance of the antenna is not reduced.
In the embodiment, the circularly polarized radiation performance of the antenna is realized by two paths of orthogonal feeds to the radiation sheet.
Preferably, the antenna radiator is of a metal structure, so that the loss caused by introducing a dielectric material is reduced, and the antenna gain is improved;
more preferably, the antenna radiator adopts a planar metal slotted structure and a coupling loading mode, so that the miniaturization of the antenna is realized;
more preferably, the antenna has a tuning structure design, and the working frequency band of the antenna can be adjusted randomly within a certain range;
more preferably, the supporting medium and the antenna housing are made of special medium materials with high temperature resistance and radiation resistance, so that the antenna can meet various mechanical, thermal and satellite-borne environment requirements.
As shown in fig. 2, the bandwidth of the port standing-wave ratio of the U-band antenna less than 2.0 is 40%;
as shown in FIG. 3, the antenna has high circularly polarized gain and wide wave beam, and the gain in the +/-60 DEG angular domain is more than or equal to 0 dBi.
The working principle of the utility model is as follows: radio frequency signals are decomposed into two paths of electric signals with equal amplitude and 90-degree phase difference through a feed network, the feed columns feed the radiation pieces, and corresponding frequency band currents are excited, so that electromagnetic waves are radiated; the process of receiving electromagnetic waves by the antenna is the reverse of the above-described process of radiating electromagnetic waves.
Through the technical scheme, the utility model discloses a satellite-borne miniaturized U wave band circular polarized antenna, this antenna size is little, the section is low, novel structure, simple, have fine shock resistance, anti-vibration, anti-irradiation, thermal stress resistance ability, simultaneously, have high-gain, wide wave beam, circular polarization's radiation characteristic.
Claims (4)
1. A satellite-borne miniaturized U-band circularly polarized antenna is characterized by comprising a radiation piece (1), a support column (2), a feed column (3), an L-shaped column (4), a dielectric sleeve (5), a feed network (6), a base (7), a bottom cover plate (8), a radio frequency connector (9) and an antenna cover (10); the base (7) is a metal structural member with a cavity on the back surface, the support column (2), the L-shaped column (4), the dielectric sleeve (5) and the antenna housing (10) are fixed on the front surface of the base, the feed network (6) is fixed in the cavity on the back surface of the base, and the bottom cover plate (8) is fixed on the cavity on the back surface of the base (7); the feed network (6) generates two paths of electric signals with equal amplitude and 90-degree phase difference; one end of the feed column (3) is fixed on the radiation sheet (1), and the other end of the feed column penetrates through the dielectric sleeve (5) and is welded with a circuit of the feed network (6); the radiation sheet (1) is a plane metal structure with four corners being grooved, and is fixed on the base (7) by a plurality of support columns (2); the L-shaped columns (4) are inverted L-shaped metal structural members, the number of the L-shaped columns is 4, the bottom ends of the upright parts of the L-shaped columns are fixed on the base (7), and the bent parts of the L-shaped columns are fixed at the upper ends of the supporting columns (2) at corresponding positions; the radio frequency connector (9) is a coaxial connector, an outer conductor is fixed on the bottom cover plate (8), and an inner conductor is welded with the feed network (6) through a circuit.
2. The satellite-borne miniaturized U-band circularly polarized antenna according to claim 1, wherein the supporting column (2) is a dielectric material cylindrical structure.
3. The satellite-borne miniaturized U-band circularly polarized antenna according to claim 1, wherein the feeding network (6) is a printed circuit board.
4. The satellite-borne miniaturized U-band circularly polarized antenna according to claim 1, wherein the dielectric sleeve (5) is an open-hole dielectric structure for insulation between the feeding post (3) and the base (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921558009.9U CN210430112U (en) | 2019-09-18 | 2019-09-18 | Satellite-borne miniaturized U-band circularly polarized antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921558009.9U CN210430112U (en) | 2019-09-18 | 2019-09-18 | Satellite-borne miniaturized U-band circularly polarized antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210430112U true CN210430112U (en) | 2020-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921558009.9U Active CN210430112U (en) | 2019-09-18 | 2019-09-18 | Satellite-borne miniaturized U-band circularly polarized antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210430112U (en) |
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2019
- 2019-09-18 CN CN201921558009.9U patent/CN210430112U/en active Active
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