A microwave circuit model for a magnetostatic wave filter

Author

Stitzer, S.N.

Author_Institution

Westinghouse Electr. Corp., Baltimore, MD, USA

fYear

1988

fDate

25-27 May 1988

Firstpage

875

Abstract

A microwave circuit model for magnetostatic-wave (MSW) filters has been developed. In the circuit considered, a number of thin strips of epitaxially grown YIG films are coupled to a common input manifold. Each strip is subjected to a different bias field, thereby producing a different passband frequency. Each YIG strip has its own separate output transducer. The complex radiation impedance of the transducers takes into account the reflection from the open end of the YIG strip. The YIG channel is modeled as a transmission line with frequency-dependent impedance equal to the MSW radiation resistance. Triple transit ripple is accurately predicted. The effects of using external matching circuits and thin metal films applied to the YIG for triple transit ripple suppression are discussed.<>

Keywords

equivalent circuits; magnetostatic wave devices; microwave filters; modelling; passive filters; transmission line theory; MSW device; MSW radiation resistance; YFe5O12; YIG channel; bias field; common input manifold; complex radiation impedance; epitaxially grown YIG films; external matching circuits; frequency-dependent impedance; magnetostatic wave filter; microwave circuit model; microwave filter; open end reflection; output transducer; passband frequency; thin metal films; transmission line; triple transit ripple suppression; Frequency; Magnetic circuits; Magnetic separation; Magnetostatic waves; Microwave circuits; Microwave filters; Optical films; Semiconductor process modeling; Strips; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1988., IEEE MTT-S International

Conference_Location

New York, NY, USA

Type

conf

DOI

10.1109/MWSYM.1988.22171

Filename

22171