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Microwave absorption by a lossy dielectric sphere in a rectangular cavityA new theory of absorption of microwave power by a lossy dielectric sphere in a resonant rectangular chamber is developed here. In this treatment, resonant modes of the cavity are resolved into traveling plane-wave fields, and Mie's theory of scattering and absorption of a plane electromagnetic wave by a sphere is utilized. The fields in the cavity containing the sphere are found by superposition of results for the individual scattering problem for each traveling plane wave. Absorbed power is then calculated by evaluating the time-averaged Poynting vector and integrating over the surface of the sphere. Applications of microwave power absorption are discussed, with particular emphasis on processing of materials. Numerical studies based on the newly derived formulas are presented. The results exhibit the manner in which microwave absorption is influenced by a number of different experimentally controllable parameters. The examples considered were chosen with a view toward designing experiments and apparatus for containerless processing of materials in the microgravity environment of space.
Document ID
19920032304
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Jackson, H. W.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Barmatz, M.
(JPL Pasadena, CA, United States)
Date Acquired
August 15, 2013
Publication Date
November 15, 1991
Publication Information
Publication: Journal of Applied Physics
Volume: 70
ISSN: 0021-8979
Subject Category
Engineering (General)
Accession Number
92A14928
Distribution Limits
Public
Copyright
Other

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