Scattering from two dimensional ferrite-loaded cavity-backed slot antennas

Author

Lopez, E.H. ; El-Sharawy, E. ; Kokotoff, D.M. ; Aberle, J.T.

Author_Institution

ESL/TRW Inc., Sunnydale, CA, USA

fYear

1993

fDate

June 28 1993-July 2 1993

Firstpage

1175

Abstract

A very general analytical model of the cavity-backed slot is used to determine the scattering characteristics of the antenna. By analyzing the scattering response of the antenna, the resonant frequencies of both the dynamic and the magnetostatic modes of the antenna are obtained. The scattered fields generated by the volume-wave magnetostatic modes in the cavity are subject to large magnetic losses incurred due to the resonance linewidth of the ferrite. These losses may be overcome in part by using ferrite materials with very narrow 3-dB linewidths. The degradation of the scattered fields for cavities completely filled with ferrite material is shown. The drastic reduction in the magnitude of the scattered fields formed by the dynamic modes of the cavity is primarily due to the mismatch imposed by the high dielectric constant at the dielectric-air interface.<>

Keywords

cavity resonators; dielectric-loaded antennas; electromagnetic wave scattering; ferrite-loaded waveguides; losses; magnetostatic waves; slot antennas; dielectric-air interface; dynamic modes; mismatch; resonant frequencies; scattering response; two dimensional ferrite-loaded cavity-backed slot antennas; volume-wave magnetostatic modes; Analytical models; Dielectric materials; Ferrites; Magnetic analysis; Magnetic materials; Magnetic resonance; Magnetostatics; Resonant frequency; Scattering; Slot antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1993. AP-S. Digest

Conference_Location

Ann Arbor, MI, USA

Print_ISBN

0-7803-1246-5

Type

conf

DOI

10.1109/APS.1993.385139

Filename

385139