Premium
Perturbation theory for a cavity resonator with a bi‐isotropic sample: Applications to measurement techniques
Author(s) -
Tretyakov Sergei A.,
Viitanen Ari J.
Publication year - 1992
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650050409
Subject(s) - isotropy , resonator , permittivity , perturbation (astronomy) , physics , perturbation theory (quantum mechanics) , acoustics , optics , materials science , computational physics , optoelectronics , dielectric , quantum mechanics
Resonator measurement techniques for exploring electromagnetic parameters of bi‐isotropic (nonreciprocal chiral) materials are discussed. The bi‐isotropic materials are the most general linear isotropic materials, and the corresponding constitutive relations are governed by four parameters. A theory of resonator measurement techniques, based on the perturbation analysis, is developed. It is shown that the complex permittivity, permeability, and nonreciprocity (Tellegen) parameter of a small sample can be determined by measuring resonant frequency shifts in a rectangular resonator. To measure the nonreciprocity parameter, a method utilizing a rectangular resonator with two degenerated modes is proposed.