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http://dx.doi.org/10.5394/KINPR.2002.26.2.215

The 100Watt Unit Power Amplifier Using Temperature Independent Biasing for DTV Repeater Application  

Lee, Young-Sub (한국해양대학교 전자통신공학과)
Jeon, Joong-Sung (한국해양대학교 부설 산업기술연구소)
Lee, Seok-Jeong (한국해양대학교 부설 산업기술연구소)
Ye, Byeong-Duck (한국해양대학교 해사수송과학부)
Hong, Tchang-Hee (한국해양대학교 전자통신공학과)
Publication Information
Journal of Navigation and Port Research / v.26, no.2, 2002 , pp. 215-220 More about this Journal
Abstract
In this paper, the 100 watt unit ower amplifier using temperature independent biasing for DTV (Digital Television) repeater application is designed and fabricated. The DC operation point of this unit power amplifier at temperature variation from $20^{\circ}C$ to $100^{\circ}C$ is fixed by active bias circuit. The variation of current consumption in the 100 watt unit power amplifier has an excellent characteristics of less than 0.6A. The implemented unit power amplifier has the gain over 12dB, the gain flatness of less than 0.5dB and input and output return, loss of than 15dB over the DTV repeater frequency range (470~806MHz). This unit power amplifier yields intermodulation distortion(IMD) of more than 32dBc at 2MHz offset, which satisfies the IMD at output power of 100 watt (50dBm).
Keywords
Amplifier; Intermodulation distortion; Digital TV;
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