Title :
Design and Performance of Cryogenically-Coolable Ultra Low Noise, L-Band Amplifier
Author :
Gallego, J.D. ; Pospieszalski, M.W.
Author_Institution :
Centro Astronomico de Yebes, Apartado de Correos 148, 19080 Guadalajara, Spain.
Abstract :
The design, realization and measurement of an ultra low-noise, cryogenically-coolable, L-band amplifier for radio astronomy applications are described. The amplifier exhibits 3 K (0.045 dB N.F.) average noise temperature over 600 MHz. bandwith with 36 dB of gain at ambient temperature of 12.5 K and 2 K average noise at physical temperature of 4.2 K. Excellent agreement between measured and predicted results verifies the validity of a recent published wideband model of a FET for L-band frequencies.
Keywords :
Broadband amplifiers; Extraterrestrial measurements; Frequency measurement; Gain measurement; L-band; Low-noise amplifiers; Noise measurement; Predictive models; Radio astronomy; Temperature;
Conference_Titel :
Microwave Conference, 1990. 20th European
Conference_Location :
Budapest, Hungary
DOI :
10.1109/EUMA.1990.336325
