Abstract

Superconducting thin film tunnel junctions with a niobium or niobium nitride base electrode and lead-indium counter electrode have been made and tested with success at LETI (Grenoble) and ENS (Paris) at 35 GHz in mixing experiments. NbN junctions gave double side band mixer noise temperatures of about 70 K with 7 dB conversion loss. NbN is expected to be a very good material for applications at frequencies above 115 GHz due to its large energy gap, compared to the usual tin or lead alloys.

Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call