Investigation of RF Power Amplifiers for 802.11a Mobile Terminals

Ana González
System Level Integration, Acreo AB, Sweden

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Ingår i: GigaHertz 2003. Proceedings from the Seventh Symposium

Linköping Electronic Conference Proceedings 8:41, s.

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Publicerad: 2003-11-06


ISSN: 1650-3686 (tryckt), 1650-3740 (online)


In this paper; the performances of various bias classes of Power Amplifiers (PA) working in 802.11a transmitters are presented. Computer simulations of a complete 802.11a transmitter have been made in order to investigate the PA efficiency and Adjacent Channel Power Ratio (ACPR) at the output of the non-linear PA. A high-level power amplifier model is used to model the different classes of amplifiers (class A; class B; class AB and class C) according to the conduction angle at the output signal of the PA. Other behaviors given in real amplifiers; such as the saturation level and compression near saturation are modeled as well. Results of PA efficiency; ACPR and output spectra are presented.


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