Theory and experiment of a rectangular slot on a sphere

Author

Leung, Kwok Wa

Author_Institution

Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, Hong Kong

Volume

46

Issue

12

fYear

1998

fDate

12/1/1998 12:00:00 AM

Firstpage

2117

Lastpage

2123

Abstract

A rectangular slot on a spherical cavity is studied theoretically and experimentally. The Green´s functions interior and exterior to the cavity are found rigorously using the mode-matching method. An integral equation of magnetic current in the slot is formulated, which is solved using the moment method. The singularity problem in admittance calculations is tackled and the result is very computationally efficient. Both the slot and cavity resonances are examined. Moreover, the natural and forced resonances of the cavity are addressed. The effects of slot length, cavity size, excitation location, and cavity dielectric constant on the input impedance are discussed. Very good agreement between theory and experiment is obtained

Keywords

Green´s function methods; cavity resonators; electric admittance; electric impedance; integral equations; method of moments; mode matching; permittivity; resonance; Green functions; admittance calculations; cavity dielectric constant; cavity resonances; cavity size; excitation location; forced resonances; input impedance; integral equation; magnetic current; mode-matching method; moment method; natural resonances; rectangular slot; singularity problem; slot length; slot resonances; spherical cavity; Admittance; Dielectric constant; Impedance; Integral equations; Magnetic resonance; Modal analysis; Moment methods; Mutual coupling; Planar arrays; Scattering;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.739292

Filename

739292