Abstract: The miniaturization technique of cutting slots and loading a shorting-post in the microstrip patch is used for the radar cross section(RCS) reduction of an antenna. It can reduce the working frequency and overall size of the antenna, which reduces the RCS by restraning structure mode scattering. Simulation results by applying the technique the microstrip antennas show that the RCS can be reduced about 4dB and the gain loss is less than 0.4dB, which illustrates that the compact antenna can not only guarante the antenna radiation performance, but also reduce the RCS of the antenna significantly at its working frequency.

Key words: microstrip antennas, antenna radar cross section reduction, compact antenna