Abstract
In this paper, a unique, simple, and concise structure of a circularly polarized (CP) cylindrical dielectric resonator antenna (CDRA) usable for wireless band applications is proposed. The CDRA is excited by a meandered-shaped microstrip feedline ending with a circular extension. The combined effect of this feeding mechanism along with a partial ground plane satisfies the criteria for generating circular polarization. The proposed design is operating in the frequency range of 2.80–3.41 GHz centered at 3.39 GHz with an axial ratio (AR) bandwidth of 9.14% and peak gain of 3.9 dBi. The designed structure exhibits 3-dB axial ratio beamwidth (ARBW) of 42° and 102° with ARmin of 0.54 dB and cross-polarization discrimination (XPD) of 30 dB and 31 dB in two principal planes at ϕ = 0° and ϕ = 90°, respectively. The reconfigurability between left-hand CP (LHCP) and right-hand CP (RHCP) field can be obtained by taking the mirror image of the extended meandered-shaped microstrip feedline. The antenna can be preferred for different wireless applications such as WiMAX and 5G.
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