Theoretical modeling of microstrip thin-film circulators

Author

How, H. ; Oliver, S.A. ; McKnight, S.W. ; Zavracky, P.M. ; McGruer, N.E. ; Vittoria, C.

Author_Institution

Electromagnetic Applications Inc., Boston, MA, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3433

Lastpage

3435

Abstract

We have calculated the S-parameters and losses in ferrite film junction circulators using a new effective-field theory assuming TEM-like propagation. At X-band conductivity loss dominates the dielectric and magnetic losses in Y-junction circulators fabricated on low-loss ferrite films with thicknesses less than 200 μm. Our calculations compare closely with experiments

Keywords

S-parameters; dielectric losses; eddy current losses; ferrite circulators; garnets; magnetic leakage; magnetic microwave devices; magnetic thin film devices; microstrip components; microwave circulators; modelling; yttrium compounds; 5 to 18 GHz; S-parameters; TEM-like propagation; X-band; Y-junction circulators; YFe5O12; YIG; YIG film; conductivity loss; dielectric losses; effective-field theory; ferrite film junction circulators; losses; low-loss ferrite films; magnetic losses; microstrip thin-film circulators; modeling; thicknesses; Circulators; Conductivity; Dielectric losses; Dielectric thin films; Ferrite films; Magnetic losses; Microstrip; Propagation losses; Scattering parameters; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617968

Filename

617968