A hybrid printed monopole antenna loaded with dielectric resonator for wideband and circular polarization applications

This article presents a novel compact circularly polarized antenna with wideband operation. The proposed antenna consists of a microstrip‐line‐fed printed monopole, a finite truncated ground, and a dielectric resonator (DR). Compared to the printed monopole antenna, the proposed DR‐loaded antenna has an increased impedance bandwidth, a large axial ratio bandwidth, and a good realized gain across the desired frequency range. An antenna prototype is fabricated and experimentally tested. The measured antenna impedance match is better than −10 dB over 90% from 4.5 to 11.8 GHz frequency band and the 3‐dB axial‐ratio bandwidth is better than 35% covering the 5.4–7.65 GHz frequency band. © 2012 Wiley Periodicals, Inc. Int J RF and Microwave CAE , 2012.