A Very Wide Bandwidth SIS Heterodyne Receiver Design for Millimeter and Submillimeter Astronomy

Citation

Rice, Frank Randolph, III (2021) A Very Wide Bandwidth SIS Heterodyne Receiver Design for Millimeter and Submillimeter Astronomy. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/357d-6535. https://resolver.caltech.edu/CaltechTHESIS:09062020-111601302

Abstract

This text describes in some detail the design and operational history of an instrument used as the front-end receiver for a fast, broadband, high-resolution spectrometer for the 1.3 millimeter wavelength atmospheric window. Using only a single superconductor-insulator-superconductor (SIS) tunnel junction as its heterodyne detector, the receiver’s novel design achieved then unprecedented RF and IF bandwidths and incorporated several innovations which have since been widely adopted within the millimeter and submillimeter wave research communities. Although intended as a relatively simple technology demonstrator and starting point for more refined and sophisticated designs, the receiver turned out to be a useful astronomical instrument in its own right, and it was deployed as a de facto facility instrument for several years at the Caltech Submillimeter Observatory. Also described are the author’s contributions to another important aid to research and design efforts: the SuperMix software library for the analysis and optimization of high-frequency circuitry, especially developed to aid in the design of systems involving SIS and other superconducting elements. Finally, the text may serve as a useful introduction to the theory behind and methodology for modeling and design of SIS heterodyne mixers.

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