CPW Fed Ultra-Wideband Square Slot Antenna with Wideband Circular Polarization

In this work, a compact CPW (Coplanar Waveguide) fed square slot antenna with grounded L-strip and I-shaped radiator for wideband circular polarization is designed, analyzed and fabricated. Proposed antenna provides left hand circular polarization (LHCP) which are described by surface current distribution. It is simple in structure and provide ultra-wide band impedance bandwidth (IMBW) 116% and wideband circular polarization (3-dB ARBW) 33.96%. The peak gain and efficiency of this simple structure are 5.92dBi and 91% respectively. The overall floor surface area of proposed antenna is 20×20×1.524 mm³.