Title :
Free-space quasi-optical spectrometer for material characterization in the 50–500 GHz frequency range
Author :
Kazemipour, Alireza ; Hudlicka, Martin ; Salhi, Mohammed ; Kleine-Ostmann, Thomas ; Schrader, Thorsten
Author_Institution :
Phys.-Tech. Bundesanstalt, Braunschweig, Germany
Abstract :
A compact free-space setup is designed based on 90-degree off-axis parabolic mirrors and pyramidal horn antennas to cover a wide frequency range from 50 GHz to 500 GHz. A commercial VNA with frequency extenders is used to measure s-parameters and provide raw data to extract intrinsic material characteristics. The calibration process is simplified and a method is presented to extract both real and imaginary part of permittivity. Several materials were measured and the extracted parameters are presented.
Keywords :
S-parameters; calibration; horn antennas; millimetre wave materials; mirrors; terahertz wave spectra; 90-degree off-axis parabolic mirrors; S-parameters; calibration process; commercial VNA; free-space quasioptical spectrometer; frequency 50 GHz to 500 GHz; frequency extenders; intrinsic material characteristic extraction; material characterization; permittivity; pyramidal horn antennas; Calibration; Frequency measurement; Materials; Mirrors; Permittivity; Permittivity measurement; Slabs; Material characterization; Millimeter and sub-millimeter band; Quasi-optical systems; THz spectroscopy;
Conference_Titel :
Microwave Conference (EuMC), 2014 44th European
Conference_Location :
Rome
DOI :
10.1109/EuMC.2014.6986514
