论文信息 - New supply modulation optimization methodology for concurrent dual band envelope tracking power amplifier

New supply modulation optimization methodology for concurrent dual band envelope tracking power amplifier

In this paper, the design, implementation, and measurement results of a concurrent dual-band envelope tracking (ET) system is presented. A GaN power amplifier (PA) is designed for concurrent dual-band operation. The iso-gain shaping functions for envelope tracking are then extracted from the characterization of the PA in each band. To investigate the envelope tracking performance under concurrent dual-band operation and establish the optimal dual-band shaping function, a new supply modulation scheme is proposed. An experimental test bench is also presented. The performances of the new schemes are evaluated with a dual-band signal based on a LTE signal with PAR of 10dB centered at 1892.8MHz and a WCDMA signal with PAR of 5dB centered at 2200MHz. Experimental results show 57 % average drain efficiency for peak output power of 36.6 dBm and 36.5 dBm.

Patrick Roblin | Haedong Jang | Naveen Naraharisetti | Yiqiao Lin | Christophe Quindroit

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