Single-layer polarization-switchable frequency-band-fixed microstrip antenna using a single-switch

Abstract

A single-layer polarization-switchable frequency-band-fixed microstrip square-ring antenna was developed. The copolar plane of the radiation pattern was reconfigured with a single-switch, but the resonant frequencies were identical. A microstrip square-ring antenna was adopted, and the lateral and vertical widths of the microstrip ring were tuned to agree the resonant frequencies of the unloaded or loaded antenna. A single-layer dielectric substrate was used instead of a latest three-layer configuration. Antenna impedance was optimized to a value between those of the loaded and unloaded antennas. The proposed antenna exhibited single-switch polarization–reconfiguration on a single-layer substrate, and could thus be used in mobile communications and microwave imaging systems. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1874–1879, 2014