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【文件名】:061029@52RD_Coupling Modeling and Reduction.pdf
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Coupling Modeling and Reduction
Techniques of Cavity-Backed Slot Antennas:
FDTD Versus Measurements
Stavros V. Georgakopoulos, Student Member, IEEE, Craig R. Birtcher, and Constantine A. Balanis, Fellow, IEEE
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 on coupling calculations especially on 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.
Index Terms—Cavity-backed slot antennas, coupling modeling,