Superconducting electronics

The objectives of the research have been (1) to design, fabricate, and test Josephson mixers for use at frequencies greater than 100 GHz, (2) to fabricate and characterize various types of microbridges, particularly ones on semiconductor substrates which may exhibit measurable interaction with the substrate and (3) to measure the microwave properties of some NbN SQUIDs. Progress made on all of these topics is summarized and references to publications reporting the results in more detail are presented.