Interference type microwave radiometer circular ring antenna array based on cyclic subarrays

A technology of microwave radiometers and antenna arrays, which is applied in the directions of antenna arrays, antennas, and radiating element structures, can solve problems such as complex antenna array array optimization problems, unfavorable system modular management, and complex antenna layout design, etc., to reduce The effect of manufacturing difficulty and maintenance difficulty, improving imaging rate, and simplifying difficulty

Inactive Publication Date: 2017-02-22
NAT SPACE SCI CENT CAS
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Problems solved by technology

When the number of antennas is large and the array size is large, the optimization problem of antenna array arrangement will become very complicated.
For the ordinary minimum redundancy arrangement method, that is, the antenna arrangement scheme that is freely arranged on the entire ring to pursue the minimum redundancy, the antenna arrangement design will become very complicated, which is not conducive to the modular management of the overall system; And the system must complete the sampling of the visibility function of an image through half-circle rotation sampling, so the imaging rate of the system will become very slow

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  • Interference type microwave radiometer circular ring antenna array based on cyclic subarrays
  • Interference type microwave radiometer circular ring antenna array based on cyclic subarrays
  • Interference type microwave radiometer circular ring antenna array based on cyclic subarrays

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Embodiment 1

[0033] This embodiment aims at an interferometric microwave radiometer suitable for earth observation in a geosynchronous orbit, and uses the above-mentioned cyclic sub-array structure for antenna array design. Using this embodiment, it is possible to perform imaging observations of the earth's atmosphere in a geosynchronous orbit (about 36000 km) with a spatial resolution better than 50 km in the 53 GHz frequency band.

[0034] The antenna array in this embodiment is as figure 1 As shown, all the antenna elements in the array work at 53 GHz, the diameter of the array is 600λ, and the shortest baseline of the array is about 3.2λ. The array is a rotating time-sharing sampling ring array, and the rotation angle of the array is 1° in one sampling integration period. The ring array 3 can be divided into 8 arc-shaped sub-arrays 1. Each arc-shaped sub-array 1 has the same structure, and each arc-shaped sub-array 1 has 10 antenna elements 2 distributed. Among them, the two leftmost an...

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Abstract

The invention provides an interference type microwave radiometer circular ring antenna array based on cyclic subarrays. The circular ring antenna array adopts a circular ring array (3); the circular ring array (3) comprises a plurality of circular ring-shaped subarrays (1) arranged in an equal angular distance on the same circular ring; the angular distance is an included angle between every two adjacent circular arc-shaped subarrays; at least two antenna units (2) are distributed on each circular arc-shaped subarray (1); and each circular arc-shaped subarray (1) is arranged by adopting the antenna units (2) of the same structure respectively. The circular ring antenna array provided by the invention uses a plurality of same circular arc-shaped subarrays which are spliced into an integral circular ring array in an equal angular distance arrangement manner, so that the reliability and modularity of the system are improved, meanwhile the imaging cycle of the system is reduced, and then the work efficiency is improved.

Description

Technical field [0001] The invention relates to the design field of an interference type microwave radiometer antenna array, in particular to an interference type microwave radiometer ring antenna array based on a cyclic sub-array. Background technique [0002] Interferometric microwave radiometers, also known as synthetic aperture microwave radiometers, introduce the idea of ​​"aperture synthesis" in radio astronomy into the field of remote sensing of the earth, and have been successfully applied in space-borne and airborne earth observations in recent decades. Through related reception, spatial frequency domain measurement and other technologies, interferometric microwave radiometers can effectively solve the problems of traditional microwave radiometers with limited apertures and mechanical scanning difficulties in the spatial domain. The signals received by small antennas are used for aperture synthesis to obtain sufficient Spatial resolution. On the premise of ensuring the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q21/00
CPCH01Q21/00H01Q1/36
Inventor 韩东浩刘浩吴季张成张颖
Owner NAT SPACE SCI CENT CAS
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