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Quasi-optical modeling of a millimeter- and submillimeter-wave free-space characterization bench

Published online by Cambridge University Press:  11 February 2025

Gregory Gaudin*
Affiliation:
Microwaves department, IMT Atlantique, Brest, France
Clément Henry
Affiliation:
Microwaves department, IMT Atlantique, Brest, France
Daniel Bourreau
Affiliation:
Microwaves department, IMT Atlantique, Brest, France
Alain Peden
Affiliation:
Microwaves department, IMT Atlantique, Brest, France
*
Corresponding author: Gregory Gaudin; Email: gregory.gaudin@imt-atlantique.fr

Abstract

In this article, we present a simulation tool for modeling a quasi-optical bench for material characterization. The model uses a Gaussian beam expansion and tracking analysis, together with a modal analysis to enable a comparison of the simulated reflection and transmission S-parameters to the ones measured with a 4-port vector network analyzer. A Thru-Reflect-Line calibration is performed to de-embed the simulated S-parameters of a dielectric slab located between two lens antennas, showing good agreement with the analytical slab model used for experimental permittivity extraction.

Type
Research Paper
Copyright
© The Author(s), 2025. Published by Cambridge University Press in association with The European Microwave Association.

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