Investigation of an electronically tuned 100 GHz superconducting phase shifter

Conference · Fri Mar 01 00:00:00 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]

---

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-; CODEN: IEMGA
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:2; Conference: 1990 applied superconductivity conference, Snowmass, CO (United States), 24-28 Sep 1990; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

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