Metasurface based low profile reconfigurable antenna

The design of a Swasthika shaped metasurface based low profile frequency reconfigurable antenna is proposed for the wireless system and satellite applications employed in unmanned air vehicles (UAV). In this work, an attempt is made to reconfigure the frequency of a microstrip patch antenna in a smart technique way. The design consists of a microstrip patch antenna based Swasthika shaped metasurface. The metasurface is placed over a microstrip patch antenna and rotated along z-axis to tune its resonant frequency. The analyzed metasurface acts as epsilon negative (ENG) metasurface property at designed frequency of 10 GHz. The inclusion of metasurface over the microstrip patch antenna results in enhancement in the gain from 5.542 dB to 7.5 dB. Moreover, the resonance frequency of proposed antenna is tuned from 4.48 GHz to 4.603 GHz by rotating the metasurface (from 0° to 80°). The antenna parameters like return loss, gain, VSWR, and radiation pattern are studied and analyzed using full-wave method.