Method and structure for improving isolation of C-band radar antenna under protective material

Abstract

The invention discloses a method and a structure for improving isolation of a C-band radar antenna under a protective material. The method comprises the following steps: enabling the protective material to cover the surface of an aircraft / ship / vehicle body, and determining a specific region of electromagnetic waves responding to the radiation of the radar antenna; processing according to the parameter information of the protective material in the specific area to obtain feature information of a metal grid band; and based on the characteristic information of the metal grid band, arranging the metal grid band in the gap of the protective material in the specific area, wherein the height of the metal grid band is at least greater than half of the wavelength of the electromagnetic wave under the protective material. The method and the structure are simple to implement, coupling energy between the transmitting and receiving antennas can be reduced, transmitting and receiving isolation is improved, and the problem that radar work is affected by electromagnetic interference caused by protective materials is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of radar antennas, in particular to a method and structure for improving the isolation of C-band radar antennas under protective materials. Background technique [0002] Systems such as aircraft, ships, and automobiles usually have multiple radar devices, and these devices must meet electromagnetic compatibility requirements and work normally without mutual interference. For some special applications, protective materials need to be added to the surface of aircraft, ships, and automobiles. One of the protective materials is likely to cause distortion of the antenna pattern, increase the level of the side lobe, and increase the interference signal to the surrounding equipment. Both, the protective material changes the surface current distribution of the aircraft / ship / vehicle body, which will guide the radiated energy into other antennas in the form of surface waves, increasing the coupling energy between ant...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method and structure for improving the isolation of the C-band radar antenna under the protective material, so as to solve the problem that the low isolation of the C-band radar antenna under the protective material interferes with each other and affects the electromagnetic compatibility.

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