Title :
2-GHz band cryogenically-cooled GaN HEMT amplifier for mobile base station receivers
Author :
Narahashi, Shoichi ; Suzuki, Yasunori ; Nojima, Toshio
Author_Institution :
NTT DoCoMo Inc., Yokosuka
Abstract :
This paper presents a 2-GHz band gallium nitride (GaN) high electron mobility transistor (HEMT) amplifier cryogenically cooled to 60 K as a part of the cryogenic receiver front-end (CRFE) for mobile base station receivers. The GaN HEMT amplifier attains the output power of 3 W and the maximum power added efficiency of 62% with a 50 V drain bias for class-AB operation. The results reported herein are the first on the performance of a cryogenically cooled GaN HEMT amplifier aiming at use in a 2-GHz. band CRFE.
Keywords :
amplifiers; gallium compounds; high electron mobility transistors; mobile communication; receivers; CRFE; HEMT amplifier; cryogenic receiver front-end; gallium nitride; high electron mobility transistor; mobile base station receivers; Base stations; Cryogenics; FETs; Frequency; Gallium arsenide; Gallium nitride; HEMTs; Linearity; Microwave amplifiers; Power generation; Cryogenic electronics; HEMT; Index Terms; microwave power amplifiers; microwave receivers;
Conference_Titel :
Microwave Integrated Circuit Conference, 2007. EuMIC 2007. European
Conference_Location :
Munich
Print_ISBN :
978-2-87487-002-6
DOI :
10.1109/EMICC.2007.4412733
