Techniques of high efficiency and linearity transmitter

Abstract

Linearity and power efficiency of transmitter are the two major concerns in designing modern wireless communication system. Consequently various competitive and complementary technologies have been investigated. The design techniques of high efficiency power amplifier and advanced linearity transmitter architecture are generally introduced in this paper, and the implementation of several efficiency enhanced power amplifiers, such as Doherty power amplifier, inverse class E power amplifier with series tunable parallel resonant tank, multiband high efficiency power amplifier based on CRLH transmission lines and wideband (0.9-2.7 GHz) high efficiency power amplifier, are also presented. Furthermore, digital predistortion is used to increase the linearity of inverse class E power amplifier, and a high degree of spectral suppression for out-of-band is achieved. Moreover, the telemetry transmitter, which is suitable for 2 Mbps PCM signal, is developed based on high efficiency class E power amplifier. The results show the switching mode amplifiers have potential application in improving the power efficiency of telemetry transmitter. © 2013 Tsinghua University Press, and Springer-Verlag.