Title :
A circularly polarized dielectric resonator antenna excited by an asymmetrical U-slot with a backing cavity
Author :
Li, B. ; So, K.K. ; Leung, K.W.
Author_Institution :
Wireless Commun. Res. Centre, City Univ. of Hong Kong, Kowloon, China
fDate :
6/25/1905 12:00:00 AM
Abstract :
A cavity-backed circularly polarized dielectric resonator antenna (DRA) excited by an asymmetrical U-slot is investigated theoretically and experimentally. The finite-difference time-domain method using nonuniform orthogonal grids is employed to study the new configuration, with the excitation modeled by an independent resistive voltage source. The return loss, input impedance, axial ratio, and radiation pattern of the antenna are studied. Reasonable agreement between theory and experiment is obtained.
Keywords :
antenna radiation patterns; antenna theory; dielectric resonator antennas; electric impedance; electromagnetic wave polarisation; finite difference time-domain analysis; DRA; FDTD method; asymmetric U-slot; axial ratio; cavity-backed antenna; circular polarization; dielectric resonator antenna; finite-difference time-domain method; independent resistive voltage source; input impedance; nonuniform orthogonal grids; radiation pattern; return loss; Antenna radiation patterns; Antenna theory; Dielectric resonator antennas; Feeds; Finite difference methods; Impedance; Polarization; Slot antennas; Time domain analysis; Voltage;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2003.816641
