ALMA Band 5 (163-211 GHz) sideband separation mixer design
Paper in proceedings, 2008

We present the design of ALMA Band 5 sideband separation mixer based on Niobium superconducting SIS junctions and first experimental results for the double side band mixer. In this mixer the LO injection circuitry is integrated on the mixer substrate using a microstrip line directional coupler with slot-line branches in the ground plane. The isolated port of the LO coupler is terminated by a wideband floating elliptical termination. The mixer employs two SIS junctions with junction area of 3 ?m2 each, in twin junction configuration, followed by a quarter wave transformer to couple it to the RF probe. First measurements of the DSB mixer show promising results with noise temperature around 35K over the entire band.

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Author

Bhushan Billade

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Victor Belitsky

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Alexey Pavolotskiy

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Igor Lapkin

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Raquel Monje

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Vessen Vassilev

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Jacob Kooi

California Institute of Technology (Caltech)

Proceedings of the 19th International Symposium on Space Terahertz Technology, ISSTT 2008

231-233

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

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Latest update

11/5/2018