Wideband Microstrip Patch Antenna with Low RCS Using Multi-Mode Resonance

A wideband microstrip patch antenna with low radar cross section (RCS) using multi-mode resonance is proposed in this letter. Initially, a wideband shorted patch antenna (SPA) by utilizing the TM
_0,1/2
and TM
_0,3/2
modes is designed as the reference antenna. Then, the in-band RCS reduction can be obtained by introducing microstrip resonators. Finally, the proposed SPA is simulated and discussed. The result shows the antenna has generated the bandwidth for |S
₁₁
|<; -10dB of about 12.7% ranging from 3.67 to 4.17 GHz. Meanwhile, RCS reduction in the operation band of the proposed antenna in TM and TE polarization is as much as 5 and 8 dB independently as compared with the reference counterpart.