Broadband Waveguide-to-Substrate Transition Using a Unilateral Etched Finline Structure
Paper i proceeding, 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

Författare

Cristian Daniel López

Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium, GARD teknik

Vincent Desmaris

Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium, GARD teknik

Denis Meledin

Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium, GARD teknik

Alexey Pavolotskiy

Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium, GARD teknik

Victor Belitsky

Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium, GARD teknik

ISSTT Proceedings by NRAO

International Symposium on Space Terahertz Technology
Gothenburg, Sweden,

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2020-10-01