Polarization tunable microstrip patch antenna using RF-MEMS

Abstract

In this paper, design of a micro-strip patch antenna is proposed, having tunable polarization. The proposed antenna has a simple structure; a slot is created at an angle of 45 degree at the centre of patch antenna, to achieve circular polarization. An RF-MEMS switch is connected across the width of this slot; now the polarization may be tuned to linear or circular by switching the RF-MEMS switch in ON-OFF state respectively. Therefore, the proposed patch antenna has two different polarizations.