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

In 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 x 43 x 3.2 mm(3), equals to 0.73 lambda(0) x 0.73 lambda(0) x 0.054 lambda(0) (lambda(0) 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.