Broadband Waveguide-to-Substrate Transition Using a Unilateral Etched Finline Structure
Paper in proceedings, 2019

We present a novel broadband waveguide-tosubstrate transition that aims to be used for broadband mixer design. The transition consists of a unilateral finline structure with etched substrate between the fins. This particular feature reduces the overall insertion loss and facilitates matching with the waveguide. The transition is designed of a thin silicon substrate covered by a superconducting niobium thin layer. An auxiliary gold layer situated on top of the Nb-layer provides grounding for the fins and facilitates a simple mounting process in the split-block waveguide mount. In order to compare simulations with measurements, a back-to-back arrangement was designed and simulated using HFSS in the 211-373 GHz frequency band. The back-to-back simulation results show an insertion loss of less than 0.3 dB in the whole band. Furthermore, a fractional bandwidth of 55% with a return loss better than 15 dB is achieved

Unilateral Finline

Broadband Waveguide to Substrate Transition

Author

Cristian Daniel López

Chalmers, Space, Earth and Environment, Onsala Space Observatory, GARD Technology

Vincent Desmaris

Chalmers, Space, Earth and Environment, Onsala Space Observatory, GARD Technology

Denis Meledin

Chalmers, Space, Earth and Environment, Onsala Space Observatory, GARD Technology

Alexey Pavolotskiy

Chalmers, Space, Earth and Environment, Onsala Space Observatory, GARD Technology

Victor Belitsky

Chalmers, Space, Earth and Environment, Onsala Space Observatory, GARD Technology

ISSTT Proceedings by NRAO

Vol. Proceedings Book 2019 47-49

International Symposium on Space Terahertz Technology
Gothenburg, Sweden,

Subject Categories

Other Physics Topics

Other Electrical Engineering, Electronic Engineering, Information Engineering

Condensed Matter Physics

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12/7/2020