A 0.5 THz Sideband Separation SIS Mixer for APEX Telescope
Paper in proceedings, 2008

We present the design and the experimental results of a fixed-tuned sideband-separating superconductor-insulator-superconductor (SIS) mixer for 385 - 500 GHz. The sideband separation is achieved using a quadrature scheme, where two separate DSB mixer blocks are combined with an intermediate waveguide component containing the LO waveguide distribution circuitry and RF waveguide hybrid. The intermediate waveguide piece is fabricated by using copper micromachining, which gives dimensions’ accuracy better than 1 μm. The RF signal coming from the waveguide hybrid is coupled to the SIS junctions through an E-probe with integrated bias-T. We implemented an on-chip LO injection solution, where the LO coupler is integrated onto the mixer chip and fabricated together with the SIS junction and the tuning circuitry. The on-chip LO coupler is made as a combination of superconducting microstrip lines and slot-lines (branches), which gives almost a lossless solution. With the fabrication accuracy better than 0.5 μm by using optical lithography, the circuitry is proven to give a good performance following the simulations expectations.

Author

Raquel Monje

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

Victor Belitsky

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

Vessen Vassilev

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

Alexey Pavolotskiy

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

Vincent Desmaris

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

Denis Meledin

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

Doug Henke

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

Dimitar Milkov Dochev

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

In Proceedings of The 19th International Symposium on Space Terahertz Technology, Groningen, 28-30 April, 2008, ed. W. Wild, Space Research Organization of the Netherlands (SRON),

Vol. Part II 439-443

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Aerospace Engineering

Other Engineering and Technologies not elsewhere specified

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11/5/2018