A DUAL-LAYERED WIDEBAND MICROSTRIP REFLECTARRAY ANTENNA WITH VARIABLE POLARIZATION

摘要

This paper presents a newtynd of microstrip reflectarray antenna those polarization could be reconfigurable among all polarization states instead of some fixed states for dual- or multipolarized antenna, The mechanism for polarized variability is so simple that only mechanical rotation is needed. The complete theoretical analysis is given as well as a specific design sample to verify this method. At designed frequency of 10 GHz and in case of circularly polarized (CP) radiation, experimental results in agreement with simulated ones exhibit -26-dB cross-polar level (CPL), -13-dB side-lobe level, 13.5° half-power beamwidth, and 17.3-dBi gain corresponding to about 40% aperture efficiency. It also possesses 8% bandwidth from 9,5 to 10.3 GHz for CPL less than -15 dB.