Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 55, Issue 2, Pages 321-333Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2006.889819
Keywords
circular polarization (CP); dielectric resonator antennas (DRAs); wideband antenna arrays
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Circularly polarized (CP) dielectric resonator antenna (DRA) subarrays have been numerically studied and experimentally verified. Elliptical CP DRA is used as the antenna element, which is excited by either a narrow slot or a probe. The elements are arranged in a 2 by 2 subarray configuration and are excited sequentially. In order to optimize the CP bandwidth, wideband feeding networks have been designed. Three different types of feeding network are studied; they are parallel feeding network, series feeding network and hybrid ring feeding network. For the CP DRA subarray with hybrid ring feeding network, the impedance matching bandwidth (S-11 < -10 dB) and 3-dB AR bandwidth achieved are 44% and 26% respectively.
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