Three-dimensional high resolution target scattering coefficient measurement method based on bore diameter synthesizing technology

Abstract

The invention provides a method for measuring the scattering coefficient of a three-dimensional high-resolution target, which is based on the aperture synthesis technology, and the method synthesizes a large two-dimensional antenna array by controlling the antenna to accurately move in a two-dimensional space, and then obtains three-dimensional high resolution distribution of the scattering coefficient of the target by being combined with the pulse compressing technology in signal processing, thus realizing three-dimensional high resolution measurement to the scattering coefficient of the target. The method overcomes the defects of large calculation amount, approximate error, difficult application and complicated target and broadband signal of the method for calculating the scattering coefficient of the target on the basis of computational electromagnetics and the defects of low resolution and being incapable of measuring large targets in the method for measuring the scattering coefficient of the target in a microwave dark room. The method is applicable to the fields of target scattering property research, stealth material / aircraft design, and the like.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to the technical field of target scattering coefficient measurement. Background technique [0002] Acquisition of target scattering coefficient is one of the important research directions in the field of electromagnetic field. The characteristics of high-resolution target scattering coefficient have important guiding significance for the research of stealth materials and the design of stealth aircraft. According to the inventors' knowledge and published literature, for example: Cagatay Uluisik, Gonca cakir, Mustafa cakir, and Levent Sevgil: "Radar Cross Section (RCS) Modeling and Simulation, Part 1: A Tutorial Review of Definitions, Strategies, and Canonical Examples” IEEE Antennas and Propagation Magazine, Vol.50, No.1, February 2008, and SEBASTIAN R1EGGER AND WERNER WIESBECK: “Wide-BandPolarimetry and Complex Radar Cross Section Signatures”, PROCEEDINGS OFTHE IEEE, VOL 7...

AI Technical Summary

Problems solved by technology

However, the calculation method of target scattering coefficient based on computational electromagnetics has a huge amount of calculation and inevitable calculation errors, it is difficult to obtain the scattering coefficient of complex targets (such as ships, etc.), and it is difficult to analyze the scattering coefficient caused by the interaction between broadband signals and targets Variety

The target scattering coefficient measurement method in microwave anechoic chamber has a low resolution, and can only obtain the target scattering cross-sectional area, but cannot obtain the distribution of scattering coefficients in different parts of the target; in addition, due to the need to measure in the dark room, this method cannot measure large targets ( For example, the scattering coefficient of ships, etc.)

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