Electromagnetic eigenfrequencies in a spheroidal cavity (calculation by spheroidal eigenvectors)

Kokkorakis, GC; Roumeliotis, JA

dc.contributor.author	Kokkorakis, GC	en
dc.contributor.author	Roumeliotis, JA	en
dc.date.accessioned	2014-03-01T01:13:43Z
dc.date.available	2014-03-01T01:13:43Z
dc.date.issued	1998	en
dc.identifier.issn	0920-5071	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12682
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0001024562&partnerID=40&md5=80bd0711bdfe4a7923bcf9dae66b764b	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Physics, Applied	en
dc.subject.classification	Physics, Mathematical	en
dc.title	Electromagnetic eigenfrequencies in a spheroidal cavity (calculation by spheroidal eigenvectors)	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	The electromagnetic eigenfrequencies f(nsm) in a perfectly conducting spheroidal cavity are determined analytically. The analytical determination is possible in the case of small values of h = d/(2a), (h much less than 1), where d is the interfocal distance of the spheroidal cavity and 2a the length of its rotation axis. In this case exact, closed-form expressions are obtained for the expansion coefficients g(nsm)((2)) and g(nsm)((4)) in the resulting relation f(nsm)(h) = f(ns)(0) [1 + h(2) g(nsm)((2)) +h(4) g(nsm)((4)) + O(h(6))]. Analogous expressions are obtained with the use of the parameter v = 1 - a(2)/b(2) (for \v\ much less than 1), where 2b is the length of the other axis of the spheroidal cavity. The electromagnetic field is expressed in terms of spheroidal eigenvectors. Numerical results are given for the lower-order modes.	en
heal.publisher	VSP BV	en
heal.journalName	Journal of Electromagnetic Waves and Applications	en
dc.identifier.isi	ISI:000077828700008	en
dc.identifier.volume	12	en
dc.identifier.issue	12	en
dc.identifier.spage	1601	en
dc.identifier.epage	1624	en