Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Comprehensive aperture microwave radiometer circular array antenna based on hybrid subarray

A microwave radiometer and comprehensive aperture technology, applied in electromagnetic wave detection, measurement devices, instruments, etc., can solve the problems of high complexity, large weight and power consumption, large antenna size, etc., to simplify the structure complexity and reduce the processing. Difficulty, the effect of maintaining rotational balance

Active Publication Date: 2021-07-30
NAT SPACE SCI CENT CAS
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the expansion of the application field of the synthetic aperture microwave radiometer and the improvement of observation requirements, users put forward higher requirements for the observation indicators such as the spatial resolution and temperature sensitivity of the synthetic aperture microwave radiometer, resulting in the antenna size of the synthetic aperture microwave radiometer It is getting bigger and bigger, the number of array elements is increasing, the complexity is getting higher and higher, and the weight and power consumption are getting bigger and bigger. At the same time, it also brings that the processing and manufacturing of large-scale circular array antennas is difficult and cannot be folded. question

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Comprehensive aperture microwave radiometer circular array antenna based on hybrid subarray
  • Comprehensive aperture microwave radiometer circular array antenna based on hybrid subarray
  • Comprehensive aperture microwave radiometer circular array antenna based on hybrid subarray

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] The invention provides a synthetic aperture microwave radiometer circular array antenna based on a hybrid subarray; it can realize a spatial resolution better than 2 centimeters at a distance of 4 meters and a temperature sensitivity better than 1K within 10 seconds, and can meet near The need for safety detection of prohibited and dangerous items hidden under human clothing.

[0096] Such as figure 1 As shown, the antenna includes: several antenna sub-arrays distributed in a circle to form a circular array; each antenna sub-array is connected to a group of microwave receivers.

[0097] The antenna sub-array includes 2 small array element sub-arrays 1 and 4 large array element sub-arrays 2; 4 large array element sub-arrays 2 and 2 small array element sub-arrays 1 are all centered on the circle antenna array center, distributed centrally and sparsely;

[0098] Such as figure 1 As shown, each small array element sub-array 1 is set in the corresponding large array eleme...

Embodiment 2

[0108] The invention provides a synthetic aperture microwave radiometer circular array antenna based on a hybrid sub-array; it can realize a ground resolution better than 20 kilometers on a geostationary orbit and a temperature sensitivity better than 1K within 15 minutes, which can meet the geostationary orbit The above application requirements for meteorological detection of extreme weather such as typhoons.

[0109] Such as Figure 5 and 6 As shown, the antenna includes: several antenna sub-arrays distributed in a circle to form a circular array; each antenna sub-array is connected to a group of microwave receivers.

[0110] The antenna sub-array includes 8 large array element sub-arrays 2 and 2 small array element sub-arrays 1; 8 large array element sub-arrays 2 and 2 small array element sub-arrays 1 are all centered on the circle antenna array center, distributed centrally and sparsely;

[0111] Such as Figure 5 As shown, each small array element sub-array 1 is set i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of microwave radiometer antenna arrays, and particularly relates to a comprehensive aperture microwave radiometer circular array antenna based on mixed subarrays, which comprises a plurality of antenna subarrays distributed in a circumference to form a circular array. Each antenna subarray is connected with a group of microwave receivers; the antenna subarray comprises at least two small array element subarrays (1) and at least four large array element subarrays (2); the at least two small array element subarrays (1) and the at least four large array element subarrays (2) are distributed in a central symmetry mode with the circle center of the circular ring array as the center and are arranged sparsely. According to the comprehensive aperture microwave radiometer circular array antenna based on the mixed subarrays, a circular antenna array is formed in a mixed subarray mode, short baseline measurement is achieved through the small array element subarrays, long baseline measurement is achieved through the large array element subarrays, and the temperature sensitivity of the antenna can be improved by four times under the condition that the sampling baseline density is kept unchanged.

Description

technical field [0001] The invention belongs to the technical field of microwave radiometer antenna arrays, and in particular relates to a synthetic aperture microwave radiometer circular array antenna based on a hybrid subarray. Background technique [0002] Traditional true aperture microwave radiometers use a single antenna to perform imaging observations through mechanical scanning. Due to the limitation of the size of the antenna, the spatial resolution is low. Synthetic aperture microwave radiometer adopts interferometry method, utilizes sparse antenna array, and synthesizes antenna receiving surface with equivalent aperture, thereby reducing the difficulty of antenna manufacturing and obtaining higher spatial resolution. Synthetic aperture microwave radiometers have been widely used in the field of microwave remote sensing and target detection. [0003] The antenna array configuration is the key to the synthetic aperture microwave radiometer, which directly affects t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/08G01V3/12
CPCG01R29/0878G01V3/12Y02A90/10
Inventor 张成徐丹刘浩吴季
Owner NAT SPACE SCI CENT CAS
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com