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

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