Design and performance of J-band (12.4-18 GHz) ferrite microstrip circulators

Author

Oxley, C.H. ; Brazil, T.J. ; Purcell, J.J. ; Genner, R.

Author_Institution

Plessey Research (Caswell) Ltd., Allen Clark Research Centre, Towcester, UK

Volume

125

Issue

8

fYear

1978

fDate

8/1/1978 12:00:00 AM

Firstpage

724

Lastpage

726

Abstract

A computer program CIRFER is described that facilitates the design of circulators on all-ferrite substrates. With the use of the design approach, J-band circulators have been fabricated using thin-film techniques on ferrite substrates of different 4π₈ values. Good agreement was obtained between theoretical and experimental resonant-disc diameters at the centre frequency of operation of the circulator. The circulators gave isolations of 20-40 dB in mid J-band, with a corresponding loss per pass of the order of 0.5 dB. The microwave performance is sufficiently encouraging to suggest that in certain applications an all-ferrite approach could be considered, which would simplify the circulator design. The computer program CIRFER has been filed with the IEE Computer Program Library.

Keywords

circuit CAD; circulators (microwave); ferrite devices; microwave integrated circuits; strip line components; 12.4 to 18 GHz; CAD; CIRFER; J-band circulators; ferrite microstrip circuits; microwave integrated circuit; strip line components;

fLanguage

English

Journal_Title

Electrical Engineers, Proceedings of the Institution of

Publisher

iet

ISSN

0020-3270

Type

jour

DOI

10.1049/piee.1978.0169

Filename

5253678