Title :
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
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;
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
DOI :
10.1109/EuCAP.2012.6206543
