High efficiency Doherty power amplifiers for modern wireless communication systems: A brief review

Efficiency Enhancement of Base Station Power Amplifiers Using Doherty Technique

The power amplifiers are typically the most power-consuming block in wireless communication systems. Spectrum is expensive, and newer technologies demand transmission of maximum amount of data with minimum spectrum usage. This requires sophisticated modulation techniques, leading to wide, dynamic signals that require linear amplification. Although linear amplification is achievable, it always c...

High Efficiency Switching Cmos Power Amplifiers for Wireless Communications

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Advanced design features of Doherty power amplifiers

A Doherty power amplifier (DPA) is an effective structure born in 1936 which, after a scarce revival around year 2000), had been strengthened from 2005 because its capability to combine linear amplification with power efficiency. Despite the conceptual simplicity of its basic operation, a lot of practical drawbacks shrink the theoretical behavior, thus leading a significant number of research w...

Gallium Nitride-Based Power Amplifiers for Future Wireless Communication Infrastructure

Novel Architectures for High-Efficiency Amplifiers for Wireless Applications

This paper presents three novel architectures for high-efficiency amplifiers relying on new harmonic-tuning techniques. These methods yield high-efficiency power amplifiers and reduce unwanted harmonic radiation from the transmitter front end. The first method uses the active integrated-antenna approach to perform harmonic tuning. The second method uses a nontraditional periodic microstrip filt...