White Papers

A Broad Bandwidth Suspended Membrane Waveguide to Thinfilm Microstrip Transition

Overview Excellent progress in the development of Submillimeter-wave SIS and HEB mixers has been demonstrated in these years. At frequencies below 800 GHz these mixers are typically implemented using waveguide techniques, while above 800 GHz quasi-optical (open structure) methods are often used. In many instances though, the use of waveguide components offers certain advantages. This paper proposes the use of suspended Silicon (Si) and Silicon Nitride (Si3N4) membranes with silicon micro-machined backshort and feedhorn blocks. Deposited on the membrane is a "Single sided" thinfilm radial probe which extrudes partly into the waveguide. The proposed waveguide to microstrip transition is a variation on the rectangular probe design that finds a wide range of use at the lower microwave and millimeter wave frequencies.

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Publisher: California Institute of Technology
File Format: PDF
Date Published: Sep 11, 2008
Format: White Papers
Topics: Bandwidth Issues

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