Wideband circularly polarized antenna with end shorting vias and inverted L-shaped slots

Abstract

ABSTRACTIn this paper, we present a new wideband circularly polarized (CP) antenna. It has two parts, the first part is a circular ground plane with curved branches, and the second one is a circular patch with curved branches and inverted L-shaped slots. We could obtain a wideband of impedance and axial ratio (AR) through commending inverted L-shaped slots on the patch and loading end shorting vias at the corresponding ends of the arced branches in the patch and ground plane. The realized antenna has a dimension of 43 × 43 × 3.2 mm3, equals to 0.73λ0 × 0.73λ0 × 0.054λ0 (λ0 is the wavelength at the minimum frequency). The tested results illustrated that the impedance and axial ratio (AR) bandwidth are 26.98% (5.29–6.94 GHz) and 25.33% (5–6.45 GHz), respectively. The results of the actual test are basically adjacent with the simulated one.