Polarization Reconfigurable Microstrip Antennas For Wireless Communication

Abstract

Antenna systems that utilize polarization diversity are gaining popularity due to development of wireless communication in recent years. This paper presents a novel polarization reconfigurable antenna to improve the reliability of wireless communication system. The structure is very simple obtained by trimming the corners of square patch fed with microstrip line feed, and adding four small triangular shape conductors at the corners. Introducing independently biased pin diodes into the gap between patch and triangular conductors, the antenna can radiate linear polarization (LP), or left hand circular polarization (LHCP) or Right hand circular polarization (RHCP). The proposed antenna designed for 1.6 GHz range, achieve excellent performance with LP, RHCP, LHCP at the same frequency and are built on FR4-Epoxy substrate. The antenna architecture is interesting for commercial wireless applications because it is compatible with modern fabrication processes and can be realized on low cost dielectric materials.