Propagation in an Azimuthally Magnetized Circular Ferrite-Dielectric Waveguide

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 5Language: englishTyp: PDF

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Georgiev, Georgi Nikolov (Faculty of Mathematics and Informatics, University of Veliko Tirnovo "St. Cyril and St. Methodius", 5000 Veliko Tirnovo, Bulgaria)
Georgieva–Grosse, Mariana Nikolova (Meterstrasse 4, 70839 Gerlingen, Germany)

The propagation problem for normal TE0n modes in a circular waveguide, containing coaxially positioned dielectric cylinder and azimuthally magnetized ferrite toroid, is solved by real cylindrical and complex confluent hypergeometric functions. The existence of certain positive real numbers (called L numbers), connected with the positive purely imaginary zeros of the structure’s characteristic equation, is established. As a result, the phase characteristics for both signs of ferrite magnetization turn out to be finite, restricted between the cutoff frequencies and special envelope curves, determined by the L numbers.