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.