Application of a DC SQUID array amplifier to an electrically small active antenna

We have built and operated a wide band electrically small active antenna consisting of a YBa/sub 2/Cu/sub 3/O/sub 7/ half-loop over ground plane antenna, an LTS (niobium) 200 element DC SQUID array amplifier, and low-noise cryogenic GaAs buffer amplifier. These components were integrated with a liqu...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 1999-06, Vol.9 (2), p.4141-4144
Main Authors: Luine, J., Abelson, L., Brundrett, D., Burch, J., Dantsker, E., Hummer, K., Kerber, G., Wire, M., Yokoyama, K., Bowling, D., Neel, M., Hubbell, S., Li, K.
Format: Article
Language:English
Subjects:
Amplifiers
Antenna arrays
ANTENNAS
Applied sciences
Arrays
Broadband antennas
COPPER OXIDE
Cryogenics
Direct current
ELECTRONIC PRODUCTS
Exact sciences and technology
Fluid flow
GALLIUM ARSENIDE
Low-noise amplifiers
Niobium
Packaging
Radiocommunications
SQUIDs
Superconducting quantum interference devices
SUPERCONDUCTORS
Telecommunications
Telecommunications and information theory
YBCO superconductors
YTTRIUM OXIDE
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Summary:We have built and operated a wide band electrically small active antenna consisting of a YBa/sub 2/Cu/sub 3/O/sub 7/ half-loop over ground plane antenna, an LTS (niobium) 200 element DC SQUID array amplifier, and low-noise cryogenic GaAs buffer amplifier. These components were integrated with a liquid He flow cryostat into a portable stand-alone package. Measurements of active antenna response from 50 to 500 MHz were made using a transverse electromagnetic cell to illuminate the half-loop antenna. At frequencies below the observed antenna resonance (250 MHz) the active antenna response is flat thereby exhibiting wide band gain.
ISSN:1051-8223
1558-2515
DOI:10.1109/77.783937