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Radio Physics and Radio Astronomy Vol. 8, 2003, No.4, December, p.429
Peculiarities of HEMT Ultra-Low-Noise Amplifier Implementation at Non-Сryogenic Сooling Level
A.M. Korolev and V.M. Shulga
Institute of Radio Astronomy of NAS of Ukraine, 4 Krasnoznamennaya St., Kharkov 61002 Ukraine, E-mail: korol@rian.kharkov.ua
In the present work, the conditions are evaluated and experimental verification is made of the possibility to implement the ultra-low-noise L-band amplifier under moderate (non-cryogenic) cooling. Noise temperatures of about 10 and 15 K were obtained for –50 and –100 Celsius ambient temperatures respectively (the called as Peltier cooling level). First of all, this was due to using the Q-metering of the input matching circuit elements.
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