A Wideband Circularly Polarized Dielectric Resonator Antenna Array

In this article, a $2\times 4$ sequentially rotated wideband circularly polarized (CP) dielectric resonator antenna (DRA) subarray with the high gain is proposed in article. The presented constituted by four dual-cylindrical ceramic blocks, Z-shaped slot and feeding network, which can provide equal amplitude orthogonal phase signals. blocks are used as radiation element, excited slots etched on ground plane based capacitive coupling way. By combining has wide 3-dB axial ratio bandwidth (ARBW) of 42.9% (2.4 GHz, 4.40–6.80 GHz), 10-dB impedance (IBW) 52% (2.84 4.04–6.88 GHz) peak 12.5 dBic.