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The efficiency of a radio-frequency (RF) power amplifier (PA) is generally defined as the ratio between the desired transmitted radio power and the total power from a power supply, which is rather low in average with modern high peak-to-average-powerratio (PAPR) signals, as illustrated in Figure 1(a). Consequently, a small improvement in the efficiency of the RF PA can have substantial benefits for...
A novel load network design for limited harmonic manipulations to implement a transmission line waveform engineered radio frequency power amplifier for LTE applications is presented in this paper, with the target to achieve quasi-linear efficiency during power back-offs with harmonic iteration. The topology selection was based on accurate large signal modeling and simulation to obtain optimum microstrip...
In this paper, a high voltage class-F−1 GaN HEMT power amplifier (PA) was developed and optimized for envelope tracking (ET) over 920MHz to 960MHz. The design was facilitated by micro strip harmonic tuning. The PA achieved a high efficiency greater than 70% across the band by delivering over 25W average power. It was optimized for envelope tracking (ET), compared with class-A/AB power amplifiers based...
In this paper, a wideband envelope tracking base-station power amplifier with a 2nd order nested scheme utilizing GaN devices for both linear and current source array was presented, which boosts envelope tracking power amplifier efficiency over wide dynamic range. Tuneable peak efficiency points in the 1st order nested structure make a flexible efficiency adaptation for various wideband modulated...
In this paper, a novel supply modulator for envelope tracking power amplifier was presented, which boosts operation bandwidth capability to tracking up to LTE 60MHz by utilizing GaN MOSFET and compatible with feed forward loop to linearize the modulator for wideband, realizing high efficiency trading off linearity as well.
In this paper, a novel supply modulator for envelope tracking power amplifier was presented, which boosts operation bandwidth capability to tracking up to LTE 60MHz by utilizing GaN MOSFET and compatible with feed forward loop to linearize the modulator for wideband, realizing high efficiency trading off linearity as well.
In this paper, a novel supply modulator for envelope tracking power amplifier was presented, which boosts operation bandwidth capability to tracking up to LTE 60MHz by utilizing GaN MOSFET and compatible with feed forward loop to linearize the modulator for wideband, realizing high efficiency trading off linearity as well.
In this paper, a novel supply modulator with nested structure for envelope tracking base-station power amplifier was presented, which boosts average modulator efficiency by realizing additional peak efficiency points both in linear amplifier & current source array. Tuneable peak efficiency points make a flexible efficiency adaptation for various wideband signal character besides efficiency boosting.
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