Investigation of an electronically tuned 100 GHz superconducting phase shifter

Conference · Fri Mar 01 04:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6094128

Tvack, E K; Shen, Z Y; Dang, H; Radparvar, M; Faris, S M ^[1]

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1. Hypres, Inc., Elmsford, NY (United States)

This paper presents the results of an investigation aimed at realizing a tunable superconducting mm-wave phase shifter. The tuning mechanism is based on inductance modulation of NbN microstrips by excess quasiparticle injection. When measured by a dc method, using the interference patterns and resonances of specially designed dc SQUIDs, the inductance of NbN microstrips can be varied by up to 300%. Based on these results, we have designed and fabricated superconducting microstrip interferometers to operate as low power 100 GHz phase shifters. The 100 GHZ signal is coupled into and out of the interferometers by finline antennas. Amplitude modulation of the output is used as the criterion for phase shift in one of the interferometer branches.

• OSTI ID: 6094128
• Report Number(s): CONF-900944--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 27:2
• Country of Publication: United States
• Language: English

Related Subjects

665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DESIGN
FABRICATION
FILMS
FREQUENCY MODULATION
INTERFEROMETERS
MEASURING INSTRUMENTS
MODULATION
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
OPTIMIZATION
PHASE SHIFT
PNICTIDES
REFRACTORY METAL COMPOUNDS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING FILMS
TRANSITION ELEMENT COMPOUNDS
TUNING