Analysis and Design of High-Efficiency Parallel-Circuit Class-E/F Power Amplifier

Highly efficient wideband parallel‐circuit class‐E/F 3 power amplifier's design methodology

“…In terms of efficiency, it is predominantly determined by the power amplifier (PA), which is the critical power consumption component in the mobile communication system [2]. With recent trends, it is becoming urgent to develop design methodology and amplifier's architectures for broadband and high-efficiency PAs [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

“…However, there are still some drawbacks in class-E PAs, such as high peak drain voltage (V max ) and low output power capability (c p ) [5]. Recently, to address these issues, many kinds of mix-mode highefficiency PAs [6][7][8][9] have been reported by adding the harmonic tuning techniques to class-E PAs. For instance, a single-ended class-E/F 2 amplifier using a finite DC feed inductor is presented in [6], where the c p , the maximum operating frequency (f max ) and the load resistance R are improved by making a proper selection of resonance parameters α and β.…”

“…For instance, a single-ended class-E/F 2 amplifier using a finite DC feed inductor is presented in [6], where the c p , the maximum operating frequency (f max ) and the load resistance R are improved by making a proper selection of resonance parameters α and β. In [9], the author proposed a parallel-circuit (PC) class-E/F PA to further improve the performance in V max , f max and c p without dramatically increasing the circuit complexity. However, the reported mix-mode PAs [6][7][8][9] are only designed to work in a narrow frequency band, which cannot satisfy the bandwidth requirements of future communication systems [10].…”

“…In [9], the author proposed a parallel-circuit (PC) class-E/F PA to further improve the performance in V max , f max and c p without dramatically increasing the circuit complexity. However, the reported mix-mode PAs [6][7][8][9] are only designed to work in a narrow frequency band, which cannot satisfy the bandwidth requirements of future communication systems [10]. As well, the mentioned PAs also cannot be implemented in multimode and multiband applications [11].…”

A broadband Doherty power amplifier based on the two-port networks method

“…Therefore, high peak-to-average modulation signals are often used to improve data transmission capacity [1,2,3,4,5]. Traditional power amplifiers (PAs) often only maintain high efficiency at saturation, and are not suitable for amplifying the high peak-to-average ratio signals [6,7,8,9,10]. Therefore, some PAs like Doherty has become research interest because of the high efficiency at power back-off [11,12,13,14,15,16].…”