Cylindrical synthetic aperture layout method based on arc array

Abstract

The invention provides a cylindrical synthetic aperture layout method based on an arc-shaped array. The method comprises the following steps: determining an array element antenna size and a minimum effective synthetic aperture angle of the arc-shaped array; determining the maximum distance between adjacent array element centers and the interval between adjacent transmitting array elements of the arc array at least based on the working wavelength and the minimum effective synthetic aperture angle; determining array element parameters of the arc-shaped array based on the maximum distance between the centers of the adjacent array elements and the interval between the adjacent transmitting array elements, and determining the size of the arc-shaped array based on the array element parameters; determining a first geometric center position of each array element based on the array element parameters, and performing layout on the array elements according to the first geometric center positions to obtain an arc array; determining equivalent array parameters of the cylindrical synthetic aperture based on the array element parameters; determining a second geometric center position of the equivalent array element based on the equivalent array parameters, and performing layout on the arc array according to the second geometric center position. The sparse rate can be improved, and the imaging quality is good.

Description

technical field [0001] The present application relates to the technical field of radar signal processing, in particular to a cylindrical synthetic aperture layout method based on an arc array. Background technique [0002] In order to protect the safety of the masses in densely populated places such as airports, railway stations and passenger stations, it is particularly important to carry out security checks on the people coming and going in these public places. Among the many security detectors, microwave imaging security inspection is the most widely used. However, the traditional microwave imaging security detector cannot achieve all-round detection, even though the cylindrical array radar imaging system that can detect all-round has some defects: one is to use a linear array to scan left and right in a circular motion to obtain the echo data of the target object , the data acquisition time is long, the efficiency is low, and it is difficult to meet the actual needs; th...

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Problems solved by technology

However, the traditional microwave imaging security detector cannot achieve all-round detection, even though the cylindrical array radar imaging system that can detect all-round has some defects: one is to use a linear array to scan left and right in a circular motion to obtain the echo data of the target object , the data acquisition time is long, the efficiency is low, and it is difficult to meet the actual needs; the second is to reduce the data acquisition time, resulting in a large number of radar array elements, which is difficult to apply to the actual system

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