An 60 W average power wideband amplifier with envelope tracking for DVB-T applications
An 60 W average power wideband amplifier with envelope tracking for DVB-T applications
复制标题
适用于 DVB-T 应用的具有包络跟踪功能的 60 W 平均功率宽带放大器
DOI:
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发表时间:
2016
期刊:
影响因子:
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通讯作者:
G. Boeck
中科院分区:
文献类型:
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作者:
D. Maassen;L. Schenk;Martin Muessener;Peter Muehlbacher;Uwe Dalisda;G. Boeck
In this paper, the development of a DVB-T power amplifier (PA) with enhanced efficiency performance based on the envelope tracking method (ET) is described. The amplifier works in the ultrahigh frequency (UHF) band from 470 to 803 MHz. The PA consists of two coupled push-pull stages of laterally diffused metal oxide semiconductors (LDMOS) that are combined and equipped with a multilevel Supply Modulator to achieve a drain modulation. The results indicate an improved drain efficiency within 14.6 % up to η ≥ 42 % for a 8 MHz coded orthogonal frequency division multiplexing (COFDM) — signal with 9 dB peak-to-average power ratio (PAPR) including the losses of the Supply Modulator. While fulfilling the spectrum mask, the output power is higher than 60 W (470 W peak) for the frequency range from 470–803 MHz.