CN111146560A - Composite feed source parabolic cylinder antenna and detection satellite - Google Patents
Composite feed source parabolic cylinder antenna and detection satellite Download PDFInfo
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- CN111146560A CN111146560A CN202010001316.8A CN202010001316A CN111146560A CN 111146560 A CN111146560 A CN 111146560A CN 202010001316 A CN202010001316 A CN 202010001316A CN 111146560 A CN111146560 A CN 111146560A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/288—Satellite antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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Abstract
The invention discloses a composite feed source parabolic cylinder antenna and a detection satellite, wherein the composite feed source parabolic cylinder antenna comprises: the feed source device comprises an offset parabolic cylindrical antenna, a composite feed source array and a parabolic cylindrical support piece, wherein the parabolic cylindrical support piece is used for supporting the offset parabolic cylindrical antenna, the composite feed source array comprises a phased array feed source, a sparse feed source array and a feed source mounting plate, and the phased array feed source and the sparse feed source array are arranged on the feed source mounting plate; the phase center of each feed source in the sparse feed source array is arranged on the focal line of the offset parabolic cylinder antenna, the array direction of the phased array feed source is parallel to the focal line and is arranged in an offset focal mode, and the feed source aperture surface of the phased array feed source is flush with the feed source aperture surface of the sparse feed source array. The invention adopts double rows of feed source arrays and shares the parabolic cylinder antenna, can form a high-gain narrow beam which can be scanned in one dimension and a plurality of elliptical beams which have the same direction and similar shapes, realizes the integrated design of the antenna, and has the technical characteristics of light weight, low cost and high detection precision.
Description
Technical Field
The invention belongs to the technical field of antennas, and particularly relates to a composite feed source parabolic cylinder antenna and a detection satellite.
Background
In the technical field of microwave detectors, active and passive remote sensing combined observation can be used for carrying out downscaling on passive microwave brightness temperature or data obtained by inversion of the passive microwave brightness temperature by utilizing active observation, high-resolution and high-precision microwave detection can be realized, and an antenna technology is one of key technologies for realizing combined observation.
The active detection adopts a synthetic aperture radar system, the antenna beam needs high gain to cover a certain range in order to ensure a certain width in the distance direction, the requirement of resolution ratio is considered, the beam needs to be converged in the azimuth direction, and the antenna needs to generate a one-dimensional scannable high-gain narrow beam. The passive detection adopts a one-dimensional synthetic aperture interferometry technique, a plurality of independent antenna beams are used for simultaneously observing the same scene, signals received by the antenna beams are subjected to correlation processing, multiple measurements are carried out on different antenna spacing vectors, and a microwave radiation image is obtained after image reconstruction. According to the characteristics of passive detection, the antenna beam is required to be focused in one dimension to ensure the resolution ratio, and meanwhile, the antenna beam is required to have certain beam width in the other dimension to ensure the width in the cross-track direction.
In order to meet the beam requirements of active and passive microwave detection at the same time, the antenna designed by the method in the prior art is high in pertinence through independent design of matched antennas, but the total weight and the volume of the antenna are calculated by two antennas, and particularly for a large reflector antenna, the independent design of the active and passive antennas needs to pay more cost and weight resources. In addition, an antenna is used for the active antenna and the passive antenna respectively, uncertain factors are added for the active data fusion and the passive data fusion, and the detection precision of the microwave detector is influenced.
Disclosure of Invention
The invention aims to provide a composite feed source parabolic cylinder antenna and a detection satellite, realizes the integrated design of an active microwave detector antenna and a passive microwave detector antenna, and has the technical characteristics of light weight, low cost and high detection precision.
In order to solve the problems, the technical scheme of the invention is as follows:
a compound feed parabolic cylinder antenna comprising: the feed source device comprises an offset parabolic cylindrical antenna, a composite feed source array and a parabolic cylindrical support piece, wherein the parabolic cylindrical support piece is used for supporting the offset parabolic cylindrical antenna, the composite feed source array comprises a phased array feed source, a sparse feed source array and a feed source mounting plate, and the phased array feed source and the sparse feed source array are arranged on the feed source mounting plate; wherein the content of the first and second substances,
the phase center of each feed source in the sparse feed source array is arranged on the focal line of the offset parabolic cylinder antenna, the array direction of the phased array feed source is parallel to the focal line and is arranged in an offset focal mode, and the feed source aperture surface of the phased array feed source is flush with the feed source aperture surface of the sparse feed source array.
Further preferably, the phased array feed source comprises a radiation unit, a T/R assembly, a power distribution network and a wave control unit, wherein an input port of the radiation unit is connected with an output port of the T/R assembly, an input port of the T/R assembly is connected with the power distribution network, and the wave control unit is connected with the T/R assembly.
Further preferably, the feed source mounting panel includes hang plate and bottom plate, and the one end of hang plate is connected with the one end of bottom plate, and the hang plate is the slope setting for the bottom plate, and the inclined plane of hang plate is towards the bias parabolic cylinder antenna of biasing, and phased array feed source and sparse feed source array's feed source orofacial features all locate on the hang plate, and T/R subassembly, merit divide network and wave control unit all locate on the bottom plate.
Further preferably, the radiating unit and the T/R assembly are connected via a semi-steel cable.
A probe satellite comprising a compound feed parabolic dish antenna as described in any one of the above embodiments.
Compared with the prior art, the invention has the following advantages and positive effects:
1) the invention utilizes the characteristics of parabolic cylinder antennas on one-dimensional focusing and one-dimensional plane reflection of electromagnetic waves, adopts a double-row feed source array, takes a phased array feed source and a sparse feed source array as an active feed source and a passive feed source respectively, and shares the parabolic cylinder antennas, so that a one-dimensional high-gain narrow beam capable of scanning and a plurality of elliptical beams with consistent pointing directions and similar shapes can be formed, and the integrated design of the active microwave detector antenna and the passive microwave detector antenna is realized;
2) the feed source mounting plate is provided with the bottom plate and the inclined plate, the feed source opening surfaces of the phased array feed source and the sparse feed source array are arranged on the inclined plate on the same plane, and the rest of single machines are arranged on the bottom plate, so that the electromagnetic wave interference on antenna radiation can be reduced through a remote setting mode, and the signal stability is improved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a composite feed source parabolic cylinder antenna according to the present invention;
fig. 2 is a schematic diagram of a composite feed array structure of a composite feed parabolic cylinder antenna according to the present invention;
FIG. 3 is an active probe antenna pattern of a compound feed parabolic cylinder antenna of the present invention;
fig. 4 is a passive detection antenna pattern of a compound feed parabolic cylinder antenna of the present invention.
Description of reference numerals:
1-offset parabolic cylinder antenna; 2-a composite feed array; 201-phased array feed source; 202-sparse feed array; 203-a feed source mounting plate; 3-parabolic cylinder support.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
The present invention provides a composite feed source parabolic cylinder antenna and a detection satellite, which are further described in detail with reference to the accompanying drawings and specific embodiments
Example 1
Referring to fig. 1 and 2, the present invention provides a compound feed parabolic cylinder antenna, including: the feed source array comprises an offset parabolic cylindrical antenna 1, a composite feed source array 2 and a parabolic cylindrical support piece 3, wherein the parabolic cylindrical support piece 3 is used for supporting the offset parabolic cylindrical antenna 1, the composite feed source array 2 comprises a phased array feed source 201, a sparse feed source array 202 and a feed source mounting plate 203, and the phased array feed source 201 and the sparse feed source array 202 are arranged on the feed source mounting plate 203; wherein the content of the first and second substances,
the phase center of each feed source in the sparse feed source array 202 is arranged on the focal line of the offset parabolic cylindrical antenna 1, the array direction of the phased array feed source 201 is parallel to the focal line and is arranged in an offset focal mode, and the feed source aperture surface of the phased array feed source 201 is flush with the feed source aperture surface of the sparse feed source array 202.
The present embodiment will now be described in detail:
according to the technical scheme provided by the invention, the composite feed source parabolic cylinder antenna applied to the L-band active and passive microwave detector is specifically designed for illustration and not limitation.
Referring to fig. 1, the offset parabolic cylinder antenna 1 of the present embodiment has a focal length of 5m, an aperture of 12m × 10m, an offset angle of 50 °, and a parabolic cylinder support 3 serving as a support rod, which is connected to a star or other carrier through the support rod to fix the offset parabolic cylinder antenna 1. The composite feed array 2 is mounted on a feed mounting plate 203, and the feed mounting plate 203 can be mounted on a star or other carrier. The present embodiment uses the phased array feed 201 as an active feed array and uses the sparse feed array 202 as a passive feed array.
The phased array feed source 201 comprises a radiation unit, a T/R assembly, a power distribution network and a wave control unit, wherein an input port of the radiation unit is connected with an output port of the T/R assembly, an input port of the T/R assembly is connected with the power distribution network, and the wave control unit is connected with the T/R assembly.
The working frequency of the active feed array of the embodiment is 1.26GHz, the active phased array feed source 201 comprises 32 microstrip radiating units, 32T/R assemblies, a power distribution network and a wave control unit, and the input ports of the radiating units are connected with the output ports of the T/R assemblies through semisteel cables. The aperture surface of the active phased array feed source 201 is flush with the aperture surface of the passive sparse feed source, the array direction is parallel to the focal line of the parabolic cylinder, the offset focus is placed, and the offset focus distance is 270 mm. The working frequency of the active phased array feed source 201, the number of the microstrip radiating units and the number of the T/R components can be adjusted according to actual design requirements, and the deflection focal distance is determined by the beam pointing deflection angle. The active phased array feed 201 of this embodiment irradiates the reflecting surface of the offset parabolic cylinder antenna 1 to form a narrow beam of one-dimensional scanning, the single-side scanning range is 0 to 38 degrees, 9 wave positions are totally set, and an antenna pattern of 9 wave positions is shown in fig. 3.
The working frequency of the passive feed source array of the embodiment is 1.413GHz, the passive sparse feed source array comprises 12 microstrip unit antennas, the phase center of each sparse feed source is located on the focal line of a parabolic cylinder and is placed at a designated position along the focal line, the number (from right to left in fig. 2) and position information of each feed source are shown in the following table 1, and the feed source 6 (position 0mm) is located at the midpoint of the focal line of the parabolic cylinder. The working frequency of the passive feed source array, the number of the microstrip unit antennas and the position of each feed source can be adjusted according to actual design requirements. Each sparse feed source can form 12 similar elliptical beams through parabolic cylindrical reflection, and E-plane and H-plane directional diagrams of the elliptical beams are shown in figure 4, wherein the number of the directional diagrams is determined by the number of the needed sparse feed sources.
TABLE 1 sparse feed location information Table
| Feed source numbering | 1 | 2 | 3 | 4 | 5 | 6 |
| Position/mm | -3286.8 | -3104.2 | -2739 | -2191.2 | -913 | 0 |
| Feed source numbering | 7 | 8 | 9 | 10 | 11 | 12 |
| Position/mm | 182.6 | 365.2 | 1643.4 | 2373.8 | 3104.2 | 3286.8 |
The embodiment utilizes the characteristics of parabolic cylinder antennas on one-dimensional focusing and one-dimensional plane reflection of electromagnetic waves, adopts a double-row feed source array, takes a phased array feed source 201 and a sparse feed source array 202 as an active feed source and a passive feed source respectively, and shares the parabolic cylinder antennas, so that a high-gain narrow beam capable of scanning in one dimension and a plurality of elliptical beams which are consistent in direction and similar in shape can be formed, and the integrated design of the active microwave detector antenna and the passive microwave detector antenna is realized.
Referring to fig. 2, the feed source mounting plate 203 includes an inclined plate and a bottom plate, one end of the inclined plate is connected with one end of the bottom plate, the inclined plate is arranged obliquely relative to the bottom plate, the inclined plane of the inclined plate faces the offset parabolic cylinder antenna 1, the feed source aperture planes of the phased array feed source 201 and the sparse feed source array 202 are all arranged on the inclined plate, and the T/R component, the power division network and the wave control unit are all arranged on the bottom plate. Specifically, the inclined plate of the feed source mounting plate 203 may be a whole plate, or a large plate formed by splicing a plurality of independent small plates.
This embodiment sets up bottom plate and hang plate with feed mounting panel 203, locates the coplanar hang plate with the feed mouth face of phased array feed 201 and sparse feed array 202, installs all the other units on the bottom plate, and the reducible electromagnetic wave interference to the antenna radiation of the mode of setting up through keeping away from the formula improves the stability of signal.
Example 2
Referring to fig. 1, the application provides a detection satellite based on embodiment 1, which comprises a star body and a composite feed source parabolic cylinder antenna based on embodiment 1.
The offset parabolic cylinder antenna 1 is fixed on a star body through a parabolic cylinder support piece 3, the composite feed source array 2 is installed on a feed source installation plate 203, and the feed source installation plate 203 is installed on the star body. The active phased array feed source 201 irradiates the reflecting surface of the offset parabolic cylinder antenna 1 to form a one-dimensional high-gain narrow beam which can be scanned, and each sparse feed source can form a plurality of elliptical beams which are consistent in pointing direction and similar in shape through parabolic cylinder reflection.
Based on the composite feed source parabolic cylinder antenna of the embodiment 1, the detection satellite of the embodiment utilizes the characteristics of the parabolic cylinder antenna on one-dimensional focusing and one-dimensional plane reflection of electromagnetic waves, adopts a double-row feed source array, takes the phased array feed source 201 and the sparse feed source array 202 as an active feed source and a passive feed source respectively, and shares the parabolic cylinder antenna, so that a one-dimensional scannable high-gain narrow beam and a plurality of elliptical beams which are consistent in direction and similar in shape can be formed, and the integrated design of the active microwave detector antenna and the passive microwave detector antenna is realized.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (5)
1. A compound feed parabolic cylinder antenna, comprising: the feed source device comprises an offset parabolic cylinder antenna, a composite feed source array and a parabolic cylinder support piece, wherein the parabolic cylinder support piece is used for supporting the offset parabolic cylinder antenna, the composite feed source array comprises a phased array feed source, a sparse feed source array and a feed source mounting plate, and the phased array feed source and the sparse feed source array are arranged on the feed source mounting plate; wherein the content of the first and second substances,
the phase center of each feed source in the sparse feed source array is arranged on the focal line of the offset parabolic cylinder antenna, the array direction of the phased array feed source is parallel to the focal line and is arranged in an offset focal mode, and the feed source aperture surface of the phased array feed source is flush with the feed source aperture surface of the sparse feed source array.
2. The compound feed source parabolic cylinder antenna of claim 1, wherein the phased array feed source comprises a radiation unit, a T/R component, a power division network, and a wave control unit, an input port of the radiation unit is connected to an output port of the T/R component, an input port of the T/R component is connected to the power division network, and the wave control unit is connected to the T/R component.
3. The compound feed source parabolic cylinder antenna of claim 2, wherein the feed source mounting plate comprises an inclined plate and a bottom plate, one end of the inclined plate is connected with one end of the bottom plate, the inclined plate is arranged in an inclined manner relative to the bottom plate, an inclined plane of the inclined plate faces the offset parabolic cylinder antenna, the feed source aperture surfaces of the phased array feed source and the sparse feed source array are arranged on the inclined plate, and the T/R component, the power division network and the wave control unit are arranged on the bottom plate.
4. The compound feed parabolic cylinder antenna of claim 2, wherein the radiating element and the T/R component are connected via a semi-steel cable.
5. A probe satellite comprising a compound feed parabolic dish as described in any of the previous items 1-4.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111541049A (en) * | 2020-05-31 | 2020-08-14 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Method for reducing number of large-scale spherical column array elements |
| CN113917546A (en) * | 2021-12-07 | 2022-01-11 | 西安空间无线电技术研究所 | Space-borne scanning type push-broom radiometer system based on feed source synthesis array |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10242749A (en) * | 1997-02-24 | 1998-09-11 | Nippon Telegr & Teleph Corp <Ntt> | Multibeam reflector antenna |
| CN2884561Y (en) * | 2006-02-27 | 2007-03-28 | 中国科学院空间科学与应用研究中心 | Satellite-borne scanning radar transmitting/receiving dual-beam antenna |
| CN102104200A (en) * | 2010-10-28 | 2011-06-22 | 华南理工大学 | Space power synthetic antenna of curve array feed source bifocal parabolic reflecting surface |
| CN108287331A (en) * | 2018-04-08 | 2018-07-17 | 上海航天电子通讯设备研究所 | The spaceborne one-dimensional aperture synthesis feed array layout method of multiband |
| CN109307864A (en) * | 2018-11-27 | 2019-02-05 | 上海航天测控通信研究所 | A kind of spaceborne active-passive integratedization detection device |
| CN110470678A (en) * | 2019-09-24 | 2019-11-19 | 上海航天测控通信研究所 | A kind of satellite-borne microwave complex probe instrument |
-
2020
- 2020-01-02 CN CN202010001316.8A patent/CN111146560B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10242749A (en) * | 1997-02-24 | 1998-09-11 | Nippon Telegr & Teleph Corp <Ntt> | Multibeam reflector antenna |
| CN2884561Y (en) * | 2006-02-27 | 2007-03-28 | 中国科学院空间科学与应用研究中心 | Satellite-borne scanning radar transmitting/receiving dual-beam antenna |
| CN102104200A (en) * | 2010-10-28 | 2011-06-22 | 华南理工大学 | Space power synthetic antenna of curve array feed source bifocal parabolic reflecting surface |
| CN108287331A (en) * | 2018-04-08 | 2018-07-17 | 上海航天电子通讯设备研究所 | The spaceborne one-dimensional aperture synthesis feed array layout method of multiband |
| CN109307864A (en) * | 2018-11-27 | 2019-02-05 | 上海航天测控通信研究所 | A kind of spaceborne active-passive integratedization detection device |
| CN110470678A (en) * | 2019-09-24 | 2019-11-19 | 上海航天测控通信研究所 | A kind of satellite-borne microwave complex probe instrument |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111541049A (en) * | 2020-05-31 | 2020-08-14 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Method for reducing number of large-scale spherical column array elements |
| CN113917546A (en) * | 2021-12-07 | 2022-01-11 | 西安空间无线电技术研究所 | Space-borne scanning type push-broom radiometer system based on feed source synthesis array |
| CN113917546B (en) * | 2021-12-07 | 2024-05-31 | 西安空间无线电技术研究所 | Satellite-borne scanning type push-broom radiometer system based on feed source synthesis array |
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