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In this paper, an analysis of the output load mismatch effects on the operation of Doherty power amplifiers is presented. A load-pull based LDMOS transistor model is used to investigate the effects of the load mismatch on the load modulation seen by the carrier and peaking amplifiers of a Doherty scheme. Then, the power added efficiency and the gain of the Doherty amplifier are evaluated for various...
A high-linearity series-type Doherty amplifier that does not use bulky 3 dB quadrature hybrid coupler is developed for mobile handset applications. A predistorter is employed at the input to improve the ACPR performance at the high-power region, which effectively extends maximum linear power range. For size and stability considerations, the phasing circuits between the carrier and peak amplifiers...
Notice of Violation of IEEE Publication Principles"Fully-Integrated 0.13 μm CMOS Digital Low-IF DVB-S S2 Satellite TV Tuner Using a Discrete-Step AGC Loop"by Maxim, A.; Poorfard, R.; Johnson, R.; Crawley, P.; Kao, J.; Dong, Z.; Chennam, M.; Nutt, T.; Trager, D.;in the Proceedings of the 2007 IEEE Radio and Wireless Symposium,Jan. 2007 Page(s):67 - 70After careful and considered review, it...
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