Title :
Coupling modeling and reduction techniques of cavity-backed slot antennas: FDTD versus measurements
Author :
Georgakopoulos, Stavros V. ; Birtcher, Craig R. ; Balanis, Constantine A.
Author_Institution :
Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA
fDate :
8/1/2001 12:00:00 AM
Abstract :
Cavity-backed slot (CBS) antennas are commonly used in Earth-based and space-borne applications. In this manuscript, the finite-difference time-domain (FDTD) method is used to analyze different antenna characteristics of such elements including input impedance, coupling, and radiation patterns. Emphasis is given to coupling calculations, especially to different methods to reduce coupling. Specifically, coupling reduction is attempted using lossy material superstrates or ground plane discontinuities, such as slits. Numerical issues concerning the analysis of CBS antennas in the context of FDTD are also discussed
Keywords :
antenna radiation patterns; electromagnetic coupling; finite difference time-domain analysis; slot antennas; 6 to 14 GHz; CBS antennas; Earth-based applications; FDTD; cavity-backed slot antennas; coupling modeling; finite-difference time-domain method; ground plane discontinuities; input impedance; lossy material superstrates; radiation patterns; reduction techniques; slits; space-borne applications; Aircraft manufacture; Antenna measurements; Antenna radiation patterns; Conducting materials; Finite difference methods; Helicopters; Radar antennas; Slot antennas; Spaceborne radar; Time domain analysis;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
