TY - JOUR
T1 - Measurement of propagation constant in waveguides with wideband coherent terahertz spectroscopy
AU - Hadjiloucas, Sillas
AU - Galvão, Roberto K.H.
AU - Bowen, John W.
AU - Martini, Rainer
AU - Brucherseifer, Martin
AU - Pellemans, Harm P.M.
AU - Bolívar, Peter Haring
AU - Kurz, Heinrich
AU - Digby, John
AU - Parkhurst, Geoffrey M.
AU - Chamberlain, J. Martyn
PY - 2003/2
Y1 - 2003/2
N2 - A quasi-optical technique for characterizing micromachined waveguides is demonstrated with wideband time-resolved terahertz spectroscopy. A transfer-function representation is adopted for the description of the relation between the signals in the input and output port of the waveguides. The time-domain responses were discretized, and the waveguide transfer function was obtained through a parametric approach in the z domain after describing the system with an autoregressive with exogenous input model. The a priori assumption of the number of modes propagating in the structure was inferred from comparisons of the theoretical with the measured characteristic impedance as well as with parsimony arguments. Measurements for a precision WR-8 waveguide-adjustable short as well as for G-band reduced-height micromachined waveguides are presented.
AB - A quasi-optical technique for characterizing micromachined waveguides is demonstrated with wideband time-resolved terahertz spectroscopy. A transfer-function representation is adopted for the description of the relation between the signals in the input and output port of the waveguides. The time-domain responses were discretized, and the waveguide transfer function was obtained through a parametric approach in the z domain after describing the system with an autoregressive with exogenous input model. The a priori assumption of the number of modes propagating in the structure was inferred from comparisons of the theoretical with the measured characteristic impedance as well as with parsimony arguments. Measurements for a precision WR-8 waveguide-adjustable short as well as for G-band reduced-height micromachined waveguides are presented.
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U2 - 10.1364/JOSAB.20.000391
DO - 10.1364/JOSAB.20.000391
M3 - Article
AN - SCOPUS:0038513540
SN - 0740-3224
VL - 20
SP - 391
EP - 401
JO - Journal of the Optical Society of America B: Optical Physics
JF - Journal of the Optical Society of America B: Optical Physics
IS - 2
ER -