Reduction of the Coupling to External Sources and Modes of Propagation by a Nearly Confocal Resonator

Author

Cheng, Shi ; Ferrari, Arnaud ; Johnson, Magnus ; Rydberg, Anders ; Ziemann, Volker ; Öjefors, Erik

Author_Institution

Uppsala Univ., Uppsala

Volume

55

Issue

10

fYear

2007

Firstpage

2257

Lastpage

2261

Abstract

This paper presents a numerical and experimental study of a nearly confocal resonator with spherical mirrors at 12 GHz. The geometry was chosen in order to have a large quality factor for the diffraction losses, and thereby a weak coupling to external parasitic TE and TM modes, that propagate in a pipe on which the resonator may be installed. In turn, this allows a significant improvement of its signal-to-noise ratio, e.g., when used as a beam monitor.

Keywords

dielectric resonators; electromagnetic wave diffraction; electromagnetic wave propagation; microstrip resonators; signal processing; beam diagnostics; beam monitor; confocal resonator; diffraction loss; external parasitic TE mode; external parasitic TM mode; frequency 12 GHz; geometry; propagation mode; reflection coefficient; signal-to-noise ratio; spherical mirrors; transmission coefficient; weak coupling; Diffraction; Geometry; Mirrors; Monitoring; Optical resonators; Particle beams; Propagation losses; Q factor; Signal to noise ratio; Tellurium; Beam diagnostics; confocal resonator; reflection and transmission coefficients;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2007.906451

Filename

4339605