Title :
FDTD analysis of a metal-strip-loaded dielectric leaky-wave antenna
Author :
Chen, Min ; Houshmand, Bijan ; Itoh, Tatsuo
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
8/1/1997 12:00:00 AM
Abstract :
The finite-difference time-domain (FDTD) method is used to analyze a dielectric leaky-wave antenna comprising metal strips etched on a rectangular dielectric rod. The radiation patterns of the leaky-wave antenna with and without the transition are determined by using FDTD. The effects of the launching discontinuity on the performance of the antenna are discussed. In addition, the application of the perfectly matched layer (PML) technique to the three-dimensional (3-D) dielectric waveguide and its performance, compared to those of the Mur´s (1981) first-order and super-absorbing Mur´s first-order absorbing boundary conditions (ABCs) are described. In addition, the effects caused by perturbation on the wave propagation characteristics of dielectric waveguide are also discussed. The FDTD results are verified by a W-band experiment and found to be in good agreement
Keywords :
antenna radiation patterns; dielectric waveguides; dielectric-loaded antennas; electromagnetic wave propagation; finite difference time-domain analysis; leaky wave antennas; millimetre wave antennas; rectangular waveguides; waveguide theory; 3D dielectric waveguide; FDTD; FDTD analysis; W-band experiment; antenna performance; dielectric leaky-wave antenna; finite difference time domain; first-order absorbing boundary conditions; launching discontinuity; metal strip loaded antenna; perfectly matched layer; perturbation; radiation patterns; rectangular dielectric rod; superabsorbing Mur´s first-order ABC; superabsorbing boundary conditions; three-dimensional dielectric waveguide; transition; wave propagation characteristics; Antenna radiation patterns; Boundary conditions; Dielectrics; Etching; Finite difference methods; Frequency; Leaky wave antennas; Magnetic confinement; Millimeter wave technology; Time domain analysis;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
