A Novel Reconfigurable Microstrip Antenna With Switchable Circular Polarization

Abstract

This letter presents a novel reconfigurable microstrip antenna with switchable circular polarization using a piezoelectric transducer (PET). Two dielectric perturbers attached to the PETs are used to create perturbations for the desired circular polarizations. Right-hand circular polarization (RHCP) or left-hand circular polarization (LHCP) can be produced by pulling down one of the PETs and lifting up the other one. The full-wave simulation and measured results show good agreement. An axial ratio of less than 1 dB is observed