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Microwave cavity resonators. Some perturbation effects and their applications

Chatterjee, SK (1953) Microwave cavity resonators. Some perturbation effects and their applications. In: Journal of the British Institution of Radio Engineers, 13 (10). pp. 475-484.

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Lagrange's equation is utilized to show the analogy of a lossless microwave cavity resonator with the conventional LC network. A brief discussion on the resonant frequencies of a microwave cavity resonator and the two degenerate companion modes H01 and E11 appearing in a cavity is given. The first order perturbation theory of a small deformation of the wall of a cavity is discussed. The effects of perturbation, such as the change in the resonant frequency and the Q of a cavity, the change in the electromagnetic field configurations and hence mixing of modes are also discussed. An expression for the coupling coefficient between the two degenerate modes H01 and E11 is derived with the help of the field equations. Results indicate that in the absence of perturbation the above two degenerate modes can co-exist without losing their individual identities. Several applications of the perturbation theory, such as the measurement of the dielectric properties of matter, study of ferromagnetic resonance, etc., are described.

Item Type: Journal Article
Publication: Journal of the British Institution of Radio Engineers
Publisher: IEEE
Additional Information: Copyright 1953 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 05 Jan 2012 06:47
Last Modified: 05 Jan 2012 06:47
URI: http://eprints.iisc.ac.in/id/eprint/43061

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