Title :
Study of a multi-channel RF Amplifier Based on DC SQUID for 3-5 GHz band
Author :
Prokopenko, Georgy V. ; Shitov, Sergey V. ; Lapitskaya, Irina L. ; Kohjiro, Satoshi ; Maezawa, Masaaki ; Shoji, Akira
Author_Institution :
Nat. Inst. of Adv. Ind. Sci. & Technol., Ibaraki, Japan
fDate :
6/1/2005 12:00:00 AM
Abstract :
A low-noise rf amplifier based on a dc SQUID (SQA) is developed and tested within frequency range 3.0-4.5 GHz. The 4-channel chips are designed using proven balanced output configuration; they employ special damping filters. Each channel is tested separately demonstrating the following parameters at 3.95 GHz central frequency: gain (9.5 ± 1.0) dB, 3-dB bandwidth 300 MHz and noise temperature (1.0 ± 0.5) K. The 1-dB gain compression estimate is 50 K*GHz for bias voltage 80 μV and characteristic voltage 285 μV.
Keywords :
SQUIDs; microwave amplifiers; 1 dB; 285 muV; 3 to 4.5 GHz; 3.95 GHz; 300 MHz; 4-channel chips; 80 muV; DC SQUID; balanced output configuration; low-noise rf amplifier; multi-channel RF amplifier; Coils; Filters; Frequency; Magnetic separation; Radiofrequency amplifiers; SQUIDs; Semiconductor device noise; Superconducting device noise; Superconducting logic circuits; Testing; Josephson effect; RF Amplifiers; SQUIDs;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.850033
