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

Volume

1

fYear

1999

fDate

1999

Firstpage

506

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;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 99. Proceedings of the IEEE Region 10 Conference

Conference_Location

Cheju Island

Print_ISBN

0-7803-5739-6

Type

conf

DOI

10.1109/TENCON.1999.818462

Filename

818462