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Adjustable microstrip transformer for use with Josephson devices in mm-wave ICs

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2 Author(s)
Finnegan, T.F. ; Physikalisch Technische Bundesanstalt, Institut Berlin, Berlin, West Germany ; Soerensen, O.H.

A simple remotely adjustable cryogenic impedance transformer employing superconducting inverted microstrip circuits is described. The scheme is particularly suitable for efficiently coupling low impedance (0.1¿5 ¿) thin-film devices (e.g. Josephson junctions) in planar microwave integrated circuits to waveguide or other superconducting and semiconducting devices at millimetre wavelengths. Preliminary results obtained at 8 mm are presented.

Published in:

Electronics Letters  (Volume:17 ,  Issue: 2 )