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Strip-fed rectangular dielectric resonator antennas with/without a parasitic patch

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2 Author(s)
Bin Li ; Dept. of Electron. Eng., City Univ. of Hong Kong, China ; Kwok Wa Leung

A rectangular dielectric resonator antenna (DRA) was studied theoretically and experimentally. The rectangular DRA is excited by a strip, which is compatible with a coaxial probe. Both linearly polarized (LP) and circularly polarized (CP) fields of the antenna are considered. In previous studies of the LP rectangular DRA, only the fundamental TE111 mode has received much attention. In this paper, it is found that the fundamental TE111 mode, together with the higher-order TE113 mode, can be used to design a wide-band LP DRA. The bandwidth of the dual-mode DRA can be over 40% for a conventional rectangular DRA with a simple feed. For the CP mode, a parasitic patch is attached on a side wall of the DRA to excite a degenerate mode. In both the LP and CP cases, the finite-difference time-domain (FDTD) method is used to analyze the problems. The results agree reasonably with measurements.

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Antennas and Propagation, IEEE Transactions on  (Volume:53 ,  Issue: 7 )