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Resonance absorption in single and cascaded lossy waveguide‐dielectric resonators
Author(s) -
Minakova Lyudmila B.,
Rud Leonid A.
Publication year - 2002
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.10694
Subject(s) - resonator , microwave , lossy compression , coupling coefficient of resonators , absorption (acoustics) , waveguide , dielectric , coupling (piping) , oscillation (cell signaling) , waveguide filter , resonance (particle physics) , materials science , optics , narrowband , dielectric loss , physics , optoelectronics , engineering , filter (signal processing) , mathematics , electrical engineering , filter design , chemistry , atomic physics , prototype filter , quantum mechanics , biochemistry , statistics , metallurgy
An approximate theory of lossy waveguide‐dielectric resonators (WDRs) is developed. The theory is based on a search for the resonator's natural oscillations providing the required ratio between the radiation and intrinsic Q factors. This allows us to predict and control the level of absorbed power by changing the oscillation coupling or loss coefficient. The theory's limitations and validity are verified by a comparison with the exact numerical results obtained for the resonators, which are formed by rectangular dielectric posts and partially filled H‐plane stubs in a rectangular waveguide. Potential applications of the developed theory for the design of narrowband absorption filters are demonstrated. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 122–126, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10694
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