Evaluation of Intermodulation Distortion of a Ferrite Element by the Two-Tone Method

Author

Miura, Taro ; Davis, Lionel E.

Author_Institution

Electromagn. Centre for Microwave & Millimetre-Wave Design & Applic., Univ. of Manchester, Manchester

Volume

57

Issue

6

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

1500

Lastpage

1507

Abstract

A method to evaluate the intermodulation distortion (IMD) of a ferrite element by the two-tone method is proposed in which a dual-mode resonator enables an intense RF magnetic field to be applied to the ferrite. A test fixture operating at frequencies around 2 GHz was designed and assembled based on this concept. The IMD was measured using the test fixture and different shapes of ferrites were used to show the effect of different magnetization distributions. Discussions including the data obtained in former studies clarified factors dominating the IMD of ferrite. It is anticipated that these investigations will lead to a significant reduction in IMD in ferrite circulators, as well as an increase in power-handling capability.

Keywords

ferrite circulators; intermodulation distortion; magnetic fields; magnetisation; RF magnetic field; dual-mode resonator; ferrite circulators; ferrite element; frequency 2 GHz; intermodulation distortion; magnetization distributions; power-handling capability; test fixture; two-tone method; Circulator; ferrites; intermodulation distortion (IMD); nonlinearities; resonators; shape;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2009.2019995

Filename

4907241