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http://dx.doi.org/10.5916/jkosme.2007.31.5.575

Implementation and Evaluation of the 100 Watt High Power Amplifier for Broadband Digital TV Repeater  

Sung, Jeon-Joong (한국해양대학교 부설 산업기술연구소)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.31, no.5, 2007 , pp. 575-582 More about this Journal
Abstract
In this paper, a 100 Watt high power amplifier has been implemented and performed evaluation, which is operating at UHF band ($470\;{\sim}\;806\;MHz$) for Digital TV repeater. To achieve increase of bandwidth and high power capability, 3-way power combiner and divider of Wilkinson type was adopted. In order to measure the fabricated 100 Watt power amplifier, the estimation technique function which makes equivalent mask was used. As a result of the measurement, the existence of pilot signal is confirmed and the signal transmitted at the rated output power 100 Watt is brought out the flat feature through 6 MHz bandwidth. and it resulted that its value was less than -47 dB at the edge of radiation channel and less than -110 dB at more than 6 MHz position from channel edge.
Keywords
8VSB (8-Vestigial sideband); 8PSK (Octal Phase shift keying); HDTV (High definition television); Power amplifier;
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