Mode Coupling in a Fabry-Perot Open Resonator

Autor:	Bartlomiej Salski, Tomasz Karpisz, Piotr Czekala, Pawel Kopyt
Rok vydání:	2022
Předmět:	Permittivity Coupling Physics Radiation business.industry Physics::Optics Dielectric Condensed Matter Physics Resonator Optics Scattering-matrix method Mode coupling Electrical and Electronic Engineering business Fabry–Pérot interferometer Microwave
Zdroj:	IEEE Transactions on Microwave Theory and Techniques. 70:299-306
ISSN:	1557-9670 0018-9480
DOI:	10.1109/tmtt.2021.3081725
Popis:	A Fabry-Perot open resonator (FPOR) is a tool dedicated to broadband accurate microwave and millimeter-wave characterization of dielectric sheets. Despite the various advantages of that method, one of the major challenges limiting its applicability is unintentional coupling of Gaussian modes of interest with a particular family of parasitic higher order modes. The coupling affects the resonance frequency of the resonator loaded with the material under test, thus disturbing the extracted permittivity. It has already been shown that spectral properties of these parasitic modes can be predicted using a recently developed electromagnetic model of a FPOR based on the scattering matrix method. It is shown in this article that the systematic analysis of experimental results supplemented with accurate numerical computations allows us to suppress the impact of mode coupling on the measured permittivity.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::25d830a342c4ac28e3f87f3b5c851682 https://doi.org/10.1109/tmtt.2021.3081725 Zobrazit plný text záznamu