Keywords: radio frequency power amplifier antenna portable devices
The shrinking size of portable devices is at odds with the capability to supply longer-lasting batteries. Here are techniques to improve the PA efficiency without affecting its linearity.With decreasing form factors and increasing functional densities, energy or battery life, is in short supply, decreasing the practical nature of these mobile electronic solutions.
Within a wireless system, the radio frequency (RF) power amplifier (PA), in fact, consumes most of the energy because it must drive the antenna with sufficient power to transmit signals across space to remote receivers. As a result, the battery life of a wireless system is strongly dependent on its PA and the efficiency of the PA should therefore be as high as possible, but not at the cost of linearity.
To achieve both high efficiency and linearity in RF PAs, two are presented in this article.
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