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A Full-Height Waveguide to Thin-Film Microstrip Transition with Exceptional RF Bandwidth and Coupling Efficiency

Kooi, J. W. and Chattopadhyay, G. and Withington, S. and Rice, F. and Zmuidzinas, J. and Walker, C. and Yassin, G. (2003) A Full-Height Waveguide to Thin-Film Microstrip Transition with Exceptional RF Bandwidth and Coupling Efficiency. International Journal of Infrared and Millimeter Waves, 24 (3). pp. 261-284. ISSN 0195-9271. doi:10.1023/a:1021903132609.

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We describe a waveguide to thin-film microstrip transition for high-performance submillimetre wave and teraherz applications. The proposed constant-radius probe couples thin-film microstrip line, to full-height rectangular waveguide with better than 99% efficiency (VSWR ≤ 1.20) and 45% fractional bandwidth. Extensive HFSS simulations, backed by scale-model measurements, are presented in the paper. By selecting the substrate material and probe radius, any real impedance between ≈ 15-60 Ω can be achieved. The radial probe gives significantly improved performance over other designs discussed in the literature. Although our primary application is submillimetre wave superconducting mixers, we show that membrane techniques should allow broad-band waveguide components to be constructed for the THz frequency range.

Item Type:Article
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Kooi, J. W.0000-0002-6610-0384
Chattopadhyay, G.0000-0001-7942-5025
Additional Information:© 2003 Plenum Publishing Corporation. We wish to thank Sander Weinreb of JPL for very helpful discussions on “one-sided” waveguide probes and Mick Edgar of Caltech for many inspirational and stimulating discussions. This work was supported by NSF Grant #AST-9980846.
Funding AgencyGrant Number
Subject Keywords:Radial probe; full-height waveguide to thin-film microstrip transition; suspended membrane; capacitive waveguide tuning step; split-block; hot electron bolometer (HEB); superconducting-insulating-superconducting (SIS) tunnel junction
Issue or Number:3
Record Number:CaltechAUTHORS:20191204-144518170
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Official Citation:Kooi, J.W., Chattopadhyay, G., Withington, S. et al. International Journal of Infrared and Millimeter Waves (2003) 24: 261.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100187
Deposited By: Tony Diaz
Deposited On:04 Dec 2019 22:54
Last Modified:16 Nov 2021 17:52

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