Title :
Resonance Absorption in Nonsymmetrical Lossy Dielectric Inserts in Rectangular Waveguides
Author_Institution :
Nat. Acad. of Sci. of Ukraine, Kharkov
Abstract :
Features of resonance power absorption in a lossy dielectric resonator shaped as a rectangular trapezium in a rectangular waveguide are studied. It is found that such a resonator can provide strong absorption (or reflection) of the TE10-mode input from the straight (or inclined) interface port. The maximum absorption is observed when the sum of the coupling coefficients equals unity. Simple formulas relating the scattering and absorption coefficients with the coupling coefficients at the resonance frequency are presented. The physical mechanism of resonance absorption is discussed.
Keywords :
electromagnetic wave absorption; resonators; waveguides; TE10-mode input; coupling coefficients; lossy dielectric resonator; nonsymmetrical lossy dielectric inserts; rectangular trapezium; rectangular waveguides; resonance absorption; resonance frequency; resonance power absorption; Absorption; Coupling circuits; Dielectric losses; Frequency estimation; Insertion loss; Rectangular waveguides; Reflection; Resonance; Resonant frequency; Scattering; Lossy dielectrics; nonsymmetrical couplings; rectangular waveguides; resonance absorption; resonators;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2007.901614
