Reduction of RCS values of a patch antenna by resistive loading

As basic studies of low radar cross section (RCS) structures, patch antennas with different terminal loads were selected became of convenience for calculation and measurement. Terminal conditions of the open, short and dummy were previously studied. And effects of low RCS characteristics were shown. In this paper, terminal conditions are expanded to high ohmic resistances. Effects of RCS reductions are calculated for 50 Ω to 500 Ω resistances. RCS reductions of 5 dB to 20 dB are achieved in accordance with the increases of resistances. In order to ensure the calculated results, measurement values are also obtained.