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Propagating behavior of rectangular waveguide loaded with dissipative magnetic slab by using new algorithm
Author(s) -
Tian YuBo,
Qian Jian,
Guo WenFeng
Publication year - 2004
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/2004rs003046
Subject(s) - dissipative system , slab , waveguide , tracking (education) , transcendental equation , phase (matter) , physics , optics , computational physics , condensed matter physics , mathematical analysis , materials science , mathematics , numerical analysis , quantum mechanics , geophysics , psychology , pedagogy
Propagating constants of rectangular waveguide loaded with dissipative slab obey complex transcendental equation, of which the property of multiroot and the dependence of modes on those roots often make people puzzled, especially for dissipative magnetic materials in an asymmetrically filling situation. An effective new algorithm combining Genetic Algorithm (GA) with Parameter Tracking Scheme (PTS) and Dynamic Searching Area (DSA) technique is developed. By using the algorithm, the propagating constants of waveguide symmetrically or asymmetrically loaded with dissipative magnetic slab are solved successfully and tightly linked to certain designated modes. The results also reveal some interesting phenomena, such as for some high‐order modes and certain thickness of loaded slab, the negative phase velocity may occur.