A Novel Reconfigurable Microstrip Antenna With Switchable Circular Polarization

• Published in: IEEE antennas and wireless propagation letters Vol. 6; pp. 160 - 162
• Main Authors: Hsu, S.-H., Kai Chang
• Format: Journal Article
• Language: English
• Published: New York IEEE 2007; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; Circuits; Circular polarization; Dielectric substrates; Dielectrics; Frequency; Hoisting; Microstrip antenna; Microstrip antennas; Noise levels; perturbation; Piezoelectric polarization; piezoelectric transducer (PET); Piezoelectric transducers; Positron emission tomography; reconfigurable antenna; Schottky diodes; Simulation; Slot antennas; switchable polarization; Switches
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2007.894150

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