Abstract
A broadband circularly polarized (CP) cylindrical dielec- tric resonator antenna (DRA) is presented. The DRA is excited by an L-shaped microstrip feed line through the coupling of an annular slot in the ground plane. The broadband CP radiation is achieved by using two CP radiators, DRA and annular slot. Broadband impedance match is obtained by introducing an impedance transformer. The op- timal conflguration ofiers a 3-dB axial ratio bandwidth of 15.9%, from 6.22 to 7.28GHz, and a 10-dB impedance bandwidth of 21.3%, from 5.78 to 7.16GHz. The measured results for the constructed prototype are also exhibited and discussed.
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