Title :
Application of a DC SQUID array amplifier to an electrically small active antenna
Author :
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.
Author_Institution :
TRW Space & Electron. Group, Redondo Beach, CA, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
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.
Keywords :
SQUIDs; active antennas; amplifiers; superconducting arrays; 50 to 500 MHz; GaAs; Nb; YBa/sub 2/Cu/sub 3/O/sub 7/; YBa/sub 2/Cu/sub 3/O/sub 7/ half-loop over ground plane antenna; antenna resonance; liquid He flow cryostat; low-noise cryogenic GaAs buffer amplifier; niobium LTS DC SQUID array amplifier; portable stand-alone package; transverse electromagnetic cell; wideband active antenna; Antenna arrays; Broadband antennas; Cryogenics; Fluid flow; Gallium arsenide; Low-noise amplifiers; Niobium; Packaging; SQUIDs;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
