An FE adjustment of a waveguide turnstile junction circulator using a three quarter wavelength gyromagnetic resonator.

Helszajn, Joseph and Sharp, John (2012) An FE adjustment of a waveguide turnstile junction circulator using a three quarter wavelength gyromagnetic resonator. IET Microwave antennas and propagation. ISSN 1751-8725 (Submitted)

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One difficulty with the design of millimetre waveguide junction circulators using quarter-wave long gyromagnetic resonators, beside that of fabrication, is the inability to realize the required gyrotropy using existing ferrite materials. This shortcoming fundamentally restricts not only the gain bandwidth product of a degree-2 circulator but also produces complex gyrator circuits which are incompatible with those using single quarter wave long resonators. There is no way to alleviate the former difficulty but one way to partly deal with the latter is to have recourse to a three-quarter wave long gyromagnetic resonator in a re-entrant cavity. The purpose of this paper is to adjust the first circulation condition of one device in WR15 waveguide using a 3 dimensional commercial F.E. solver and adjust the second one experimentally.

Item Type: Article
Print ISSN: 1751-8725
Electronic ISSN: 1751-8733
Additional Information: This paper is a preprint of a paper submitted to IET Microwave antennas and propagation and is subject to Institution of Engineering and Technology Copyright. If accepted, the copy of record will be available at IET Digital Library.
Uncontrolled Keywords: Waveguide Turnstile Junction Circulator; quarter-wave long gyromagnetic resonators; gyrotropy;
University Divisions/Research Centres: Faculty of Engineering, Computing and Creative Industries > School of Engineering and the Built Environment
Dewey Decimal Subjects: 600 Technology > 620 Engineering > 621 Electronic & mechanical engineering > 621.3 Electrical & electronic engineering > 621.34 Electromagnetic engineering
Library of Congress Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Item ID: 5321
Depositing User: Prof. John Sharp
Date Deposited: 24 May 2012 13:38
Last Modified: 07 May 2014 16:02

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