Title :
Linear-/Circular-Polarization Designs of Dual-/Wide-Band Cylindrical Dielectric Resonator Antennas
Author :
Fang, Xiao Sheng ; Leung, Kwok Wa
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
fDate :
6/1/2012 12:00:00 AM
Abstract :
Linear-/circular-polarization designs of the dual-/wide-band cylindrical dielectric resonator antennas (DRAs) are presented. The HEM111 and HEM113 modes of the cylindrical DRA are utilized to design the dual-mode cylindrical DRA. A wideband antenna can be obtained by merging the two resonant modes. To facilitate the designs, new engineering formulas that determine the dimensions of the dual-mode cylindrical DRA are found for the first time. They are obtained by using the covariance matrix adaptation evolutionary strategy (CMA-ES). Design examples for the dual-/wide-band cylindrical DRAs are given for both the linearly and circularly polarized cases. Ansoft HFSS was used to simulate the DRAs and the simulations were verified with our measurements. Good agreement between the measured and simulated results is observed.
Keywords :
broadband antennas; covariance matrices; dielectric resonator antennas; electromagnetic wave polarisation; Ansoft HFSS; CMA-ES; HEM111 modes; HEM113 modes; covariance matrix adaptation evolutionary strategy; dual-wideband cylindrical DRA; dual-wideband cylindrical dielectric resonator antennas; engineering formulas; linear-circular-polarization designs; resonant modes; Antenna measurements; Dielectrics; Dual band; Frequency measurement; Gain; Moment methods; Resonant frequency; Circular polarization; cylindrical dielectric resonator antennas; dualband antennas; linear polarization; wideband antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2194682
