DocumentCode
2014901
Title
Design and measurements of cryogenic MHEMT IF low noise amplifier for radio astronomical receivers
Author
Chiong, Chau-Ching ; Tzeng, Wei-Je ; Hwang, Yuh-Jing ; Wong, Wei-Ting ; Wang, Huei ; Chen, Ming-Tang
Author_Institution
Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei 10617, Taiwan, R.O.C.
fYear
2009
fDate
28-29 Sept. 2009
Firstpage
1
Lastpage
4
Abstract
Design and cryogenic operation of an intermediate frequency (IF) low noise amplifier using a 0.15-µm InGaAs mHEMT process for Atacama Large Millimeter/Submillimeter Array (ALMA) is presented in this paper. The amplifier covers 4–12 GHz with small signal gain of 27±2 dB and effective noise temperature of 18–25 K when operating at 20 K. Different bias points are explored to investigate the potential of mHEMT amplifier operating with low dc power consumption. In this case, the amplifier can deliver 20±1 dB gain with effective noise temperature of 30 K at 4–8 GHz with 4.6 mW power consumption.
Keywords
Cryogenics; Energy consumption; Extraterrestrial measurements; Gain; Low-noise amplifiers; Noise measurement; Radiofrequency amplifiers; Receivers; Temperature; mHEMTs;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Integrated Circuits Conference, 2009. EuMIC 2009. European
Conference_Location
Rome, Italy
Print_ISBN
978-1-4244-4749-7
Type
conf
Filename
5296034
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