Wavelet filtered modelling applied to measurements of a waveguide's THz time domain response

S. Hadjiloucas, R. K.H. Galvão, V. M. Becerra, J. W. Bowen, R. Martini, M. Brucherseifer, H. P.M. Pellemans, P. H. Bolívar, H. Kurz, J. M. Chamberlain

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A quasi-optical de-embedding technique for characterizing waveguides is demonstrated using wideband time-resolved terahertz spectroscopy. A transfer function representation is adopted for the description of the signal in the input and output port of the waveguides. The time domain responses were discretised and the waveguide transfer function was obtained through a parametric approach in the z-domain after describing the system with an ARX as well as with a state space model. Prior to the identification procedure, filtering was performed in the wavelet domain to minimize signal distortion and the noise propagating in the ARX and subspace models. The model identification procedure requires isolation of the phase delay in the structure and therefore the time-domain signatures must be firstly aligned with respect to each other before they are compared. An initial estimate of the number of propagating modes was provided by comparing the measured phase delay in the structure with theoretical calculations that take into account the physical dimensions of the waveguide. Models derived from measurements of THz transients in a precision WR-8 waveguide adjustable short will be presented.

Original languageEnglish
Title of host publicationTHz 2002 - 2002 IEEE 10th International Conference on Terahertz Electronics, Proceedings
EditorsP Harrison, A G Davies, S Withington, J M Chamberlain, E H Linfield, R E Miles
Pages129-132
Number of pages4
ISBN (Electronic)0780376307, 9780780376304
DOIs
StatePublished - 2002
Event10th IEEE International Conference on Terahertz Electronics, THz 2002 - Cambridge, United Kingdom
Duration: 9 Sep 200210 Sep 2002

Publication series

NameTHz 2002 - 2002 IEEE 10th International Conference on Terahertz Electronics, Proceedings

Conference

Conference10th IEEE International Conference on Terahertz Electronics, THz 2002
Country/TerritoryUnited Kingdom
CityCambridge
Period9/09/0210/09/02

Keywords

  • Identification Algorithms
  • Multimode Waveguide Characterization
  • Signal Processing
  • THz Spectroscopy

Fingerprint

Dive into the research topics of 'Wavelet filtered modelling applied to measurements of a waveguide's THz time domain response'. Together they form a unique fingerprint.

Cite this