Analysis of cavity-backed aperture antennas with a dielectric overlay

Author

Lee, Jind-Yeh ; Tzyy-Sheng Horng ; Alexopoulos, Nicolaos G.

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

Volume

42

Issue

11

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

1556

Lastpage

1562

Abstract

A full-wave analysis of cavity-backed aperture antennas with a dielectric overlay is presented. The theoretical approach uses a closed-form dyadic Green´s function in the spectral domain. The aperture equivalent magnetic currents are obtained using the surface equivalence theorem and an integral equation is obtained by matching the fields across the aperture. The moment method applied in spectral domain analysis is employed to solve the integral equation for the equivalent magnetic currents with proper combination of subdomain or entire domain expansion functions. Numerical results include the aperture field distribution and antenna parameters such as input impedance, bandwidth, and efficiency. A set of measurements data is compared with results based on the theoretical work

Keywords

Green´s function methods; antenna theory; aperture antennas; integral equations; method of moments; slot antennas; spectral-domain analysis; antenna parameters; aperture field distribution; aperture fields matching; bandwidth; cavity-backed aperture antennas; closed-form dyadic Green´s function; dielectric overlay; efficiency; equivalent magnetic currents; expansion functions; full-wave analysis; input impedance; integral equation; measurements data; moment method; slot antennas; spectral domain; spectral domain analysis; surface equivalence theorem; Aperture antennas; Bandwidth; Dielectrics; Green´s function methods; Impedance; Integral equations; Magnetic analysis; Magnetic domains; Moment methods; Spectral analysis;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.362779

Filename

362779