A new single-fed wide dual-band circularly polarized (CP) dielectric resonator antenna (DRA) is presented in this letter. The DRA is excited by a microstrip line through the narrow underneath rectangular aperture, and its HE111and HE11δ(2°and 225°. A pair of equal arc-shaped slots are used to improve the axial-ratio (AR) and impedance bandwidths. The antenna features impedance bandwidths (|S11| <; -10 dB ) of 26.25% and 11.17%, and 3-dB AR bandwidths of 15.8% and 5.02% in the lower and upper bands, respectively. To verify the simulation, the antenna is designed and measured. Reasonable agreement between measured and simulated results is obtained.
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Zhou et al. (2015) studied this question.
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