Eigenfrequencies of an electromagnetic rectangular cavity with an inner small sphere

 
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1993 (EN)
Eigenfrequencies of an electromagnetic rectangular cavity with an inner small sphere (EN)

Roumeliotis, JA (EN)
Kokkorakis, GC (EN)

N/A (EN)

Ana;ytical expressions for the eigenfrequencies of an electromagnetic rectangular cavity eith an inner electrically small sphere are derived, for both magnetic and electric modes. The walls of the rectangular cavity are perfectly conducting. The small sphere is either perfectly conducting or lossless dielectric. Rectangular vector wave functions, as well as their expansion in terms of cylindrical vector wave functions and finally in terms of spherical ones, are used. The results are useful in problems connected with excitation or probing of resonant cavities, for cavities containing small inhomogeneities, as well as in cases in which we want to determine the permittivities or magnetic permeabilities of various materials, by measuring the eigenfrequency shifts caused by the introduction of small samples of them, inside cavities. Graphical results for some of the lower order modes are given for various values of the parameters and for both kinds of mode. © 1993. (EN)

journalArticle

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

Journal of the Franklin Institute (EN)

1993


PERGAMON-ELSEVIER SCIENCE LTD (EN)



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