Chaff cloud electromagnetic scattering coefficient measurement method and system and application

Abstract

The invention belongs to the technical field of chaff cloud cluster reflection, transmission and attenuation coefficient measurement, and discloses a chaff cloud electromagnetic scattering coefficient measurement method and system and application. A deterministic chaff cloud model is constructed by using a method of inserting a metal wire into a foam block; a material with a known reflection coefficient is measured as calibration data, and the reflection coefficient of the chaff cloud to be measured is calculated by using a comparison method; a material with a known transmission coefficient is measured as calibration data, and the transmission coefficient of the chaff cloud to be measured is calculated by using a comparison method; the attenuation coefficient of the chaff cloud is calculated by comparing the receiving power before and after material addition; and chaff cloud related parameters in different polarization modes are measured by changing the polarization angle of the receiving and transmitting antenna. The reflection, transmission and attenuation coefficients of the chaff cloud are measured, and the measured parameters can be applied to electromagnetic calculation of the chaff cloud; the experimental method is simple and practical, and can also be applied to measurement of other materials.

Description

technical field [0001] The invention belongs to the technical field of measuring the reflection, transmission and attenuation coefficients of chaff clouds, and in particular relates to a method, system and application for measuring the electromagnetic scattering coefficient of chaff clouds. Background technique [0002] At present: Chaff is a commonly used passive interference material. A single chaff is usually made of aluminum foil or fiber coated with multiple metals, which can generate interference echoes in a certain space. A large number of chaff can be used as a light aerial reflection target cloud. Chaff is usually dropped by aircraft to cover or shield other aircraft, or to cause tracking radars to lose control. During World War II, chaff was first used as an EMI material. Airplanes dropped large amounts of chaff to form corridors that shielded other aircraft from ground-based radars. Later, chaff jamming was applied to naval warfare. Ships fired a large number o...

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Problems solved by technology

[0008] The difficulties in solving the above problems and defects are: (1) Uncontrollable environmental factors; (2) It is difficult to obtain the cloud distribution of the chaff to be measured; (3) It is difficult to obtain accurate reflection, transmission, and attenuation coefficients of the chaff cloud by direct measurement

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