Circular patch microstrip antenna with reconfigurable polarization capability

A reconfigurable microstrip antenna with polarization diversities is presented in this paper. The reconfigurable antenna's structure consists of a circular patch embedded by two slots with four PIN diodes mounted on them. The reconfigurable polarization property of the proposed antenna is achieved by switching “ON/OFF” states of these diodes. Both HFSS simulation and experimental testing are carried out to characterize the antenna's performance. The investigation results show that this antenna has good reconfigurable characteristic between circular polarization (CP) and linear polarization (LP), which may have many potential applications in modern wireless communication systems.