Three-mirror resonator reflectivity measurement of plane and grooved surfaces: Setup, options, results

Author

Kasparek, W. ; Holzhauer, E. ; Kumric, H. ; Plaum, B. ; Wacker, R. ; Zeitler, A. ; Gantenbein, G.

Author_Institution

Inst. fur Plasmaforschung, Univ. Stuttgart, Stuttgart, Germany

fYear

2012

fDate

26-30 March 2012

Firstpage

585

Lastpage

589

Abstract

The reflectivity of metallic mirrors in the millimetre wave region does not only depend on the material, but also on the structure and roughness of the surface. Using a 3-mirror resonator, reflectivity and - in the case of grooved samples - also phase shifts can be determined as function of frequency, angle of incidence, and polarisation. The technique is based on the comparison of the quality factor of a 2-mirror reference resonator with the quality factor of a 3-mirror resonator with identical dimensions, including the mirror under test. Thus, no reference sample is needed. The theory is presented, set-ups and measurement options are described, and results for various plane and grooved reflectors are presented and discussed.

Keywords

Q-factor; millimetre wave resonators; mirrors; reflectivity; surface roughness; surface structure; 2-mirror reference resonator; grooved surface; metallic mirrors; millimetre wave region; plane surface; quality factor; reflectivity measurement; surface roughness; surface structure; three-mirror resonator; Absorption; Corrugated surfaces; Loss measurement; Mirrors; Surface roughness; Surface waves; millimetre wave reflectors; ohmic loss; polarizers;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (EUCAP), 2012 6th European Conference on

Conference_Location

Prague

Print_ISBN

978-1-4577-0918-0

Electronic_ISBN

978-1-4577-0919-7

Type

conf

DOI

10.1109/EuCAP.2012.6206543

Filename

6206543