Analysis of asymmetrical multilayer ferrite-loaded finlines by the extended spectral domain approach

Author

Fan, Z. ; Pennock, Steve R.

Author_Institution

Sch. of Electron. & Electr. Eng., Bath Univ., UK

Volume

44

Issue

4

fYear

1996

fDate

4/1/1996 12:00:00 AM

Firstpage

497

Lastpage

504

Abstract

The spectral domain approach is extended to analyze the nonreciprocal propagation characteristics of asymmetrical multilayer finlines containing magnetized ferrites. This extended method offers several advantages. It can be applied to nonuniform cross-section geometries, uses only one set of basis functions, and the dyadic Green´s function is efficiently derived by a recursive algorithm. Fast convergence is obtained and the accuracy of the method is verified by comparison with available computed and measured data. In comparison with symmetrical structures, the additional design degree of freedom of the asymmetry can be used to obtain wider bandwidth and higher nonreciprocity. Of the various structures considered, a four-layer dual ferrite (DF) structure is seen to be the best choice for realization of nonreciprocal phase shifters with widest bandwidth

Keywords

Green´s function methods; ferrite phase shifters; ferrite-loaded waveguides; fin lines; spectral-domain analysis; waveguide theory; asymmetrical multilayer ferrite-loaded finlines; bandwidth; convergence; design; dual ferrite structure; dyadic Green function; nonreciprocal phase shifters; nonreciprocal propagation; recursive algorithm; spectral domain analysis; Bandwidth; Convergence; Ferrites; Finline; Geometry; Green´s function methods; Magnetic analysis; Magnetic domains; Magnetic multilayers; Nonhomogeneous media;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.491016

Filename

491016