MIMO antenna array, MIMO array antenna and security inspection system

An antenna array and array antenna technology, applied in antenna arrays, radio wave measurement systems, antennas, etc., can solve serious side grid artifacts and other problems

Active Publication Date: 2019-01-08
TSINGHUA UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a MIMO antenna array with less side grid artifacts for terahertz near-field imaging, MIMO Array Antenna and Security Inspection System

Method used

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  • MIMO antenna array, MIMO array antenna and security inspection system
  • MIMO antenna array, MIMO array antenna and security inspection system
  • MIMO antenna array, MIMO array antenna and security inspection system

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Embodiment Construction

[0032] In order to make the purpose, technical solutions, and advantages of the application more clear, the application will be further described in detail below with reference to embodiments and drawings. It should be understood that the specific embodiments described here are only used to explain the application, and not used to limit the application.

[0033] The serial numbers assigned to the parts herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequence or technical meaning. The terms "connection" and "connection" in this application, unless otherwise specified, include direct and indirect connection (connection). In the description of this application, it should be understood that the terms “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, The orientation or positional relationship indicated by "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the ...

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Abstract

The present application provides a MIMO antenna array, MIMO array antenna and security inspection system for terahertz near-field imaging. The receiving antenna and the plurality of transmitting antennas are arranged on the same circular arc and uniformly distributed respectively. The receiving antenna and the plurality of transmitting antennas are arranged on the same arc, so that the distance between the receiving antenna and the plurality of transmitting antennas and the center of the circle is equal. Based on the principle of equivalent phase center, the combination of any pair of transmitting and receiving antennas can be replaced by an antenna which is located in the center of the two antennas. Only in the far-field condition, the equivalent phase center principle can hold true, andthe approximate error in the near-field condition can not be ignored. MIMO antenna array utilizes the characteristic that the distance from any point on the circle to the center of the circle is equal, The method of designing linear MIMO antenna array based on the principle of equivalent phase center is modified, which solves the problem of serious side-gate artifacts in near-field imaging of linear MIMO array based on the principle of equivalent phase center, and improves the imaging quality.

Description

Technical field [0001] This application relates to the field of security inspection, in particular to a MIMO antenna array, MIMO array antenna and security inspection system for terahertz near-field imaging. Background technique [0002] Terahertz imaging technology is a technology that uses high-frequency electromagnetic waves in the frequency band of 0.1THz-10THz to image. Compared with traditional X-ray imaging technology, infrared imaging technology, and microwave imaging technology, terahertz imaging has good safety, The advantages of strong penetrability, high image quality, and certain substance recognition capabilities have attracted more and more attention. Multiple-Input Multiple-Output (MIMO) imaging radar is a radar that uses multiple combinations of transceiver antenna units to generate images with a small number of antennas. It has low cost and complexity and a fast data acquisition rate. Features. The terahertz imaging technology based on multiple-receiving and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/50H01Q21/00G01S7/02G01S13/89
CPCG01S7/02G01S13/89H01Q1/50H01Q21/00
Inventor 郑小平赵自然于洋乔灵博
Owner TSINGHUA UNIV
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