Title :
Design and realization of driving amplifier MMIC circuit stages for KT IMT-2000 handset
Author :
Nam, Jung Myung ; Ho, Jang Won ; Rea, Chung Myung ; Hyun, Lee Yun
Author_Institution :
Lab. of Access Network, Korea Telecom, Seoul, South Korea
Abstract :
In this paper, an IMT-2000 driving amplifier MMIC with variable gain amplifier (VGA) to linearly controlled output gain is designed, fabricated and analyzed. The driving amplifier (which is composed of three stages, the middle stage gain is 40 dB which is provided by cascaded junction of the three stages) is realized. We have designed a stable and reliable output stage driving amplifier for the KT IMT-2000 handset, and realized the following improved features: 3.5 times bandwidth, 15 dBm output power, 25~27 dB output power gain, -15~-20 dB VSWR, 3 dB gain flatness at the operating frequency
Keywords :
MESFET integrated circuits; MMIC power amplifiers; cellular radio; driver circuits; field effect MMIC; integrated circuit layout; radio equipment; radiofrequency amplifiers; 25 to 27 dB; 3 dB; 40 dB; IMT-2000 driving amplifier MMIC; KT IMT-2000 handset; VSW; bandwidth; cascaded junction; design; driving amplifier MMIC circuit stages; gain flatness; linearly controlled output gain; middle stage gain; output power; output power gain; realization; stable reliable output stage driving amplifier; variable gain amplifier; Bandwidth; Circuits; Gain; MMICs; Power amplifiers; Power generation; Radio frequency; Radiofrequency amplifiers; Telephone sets; Voltage control;
Conference_Titel :
TENCON 99. Proceedings of the IEEE Region 10 Conference
Conference_Location :
Cheju Island
Print_ISBN :
0-7803-5739-6
DOI :
10.1109/TENCON.1999.818462
