An envelope amplifier prototype intended for highefficiency linearization techniques in radiofrequency transmitters is shown in this paper. The amplifier is based on a four levels power supply Class-G amplifier topology. The implemented prototype performs 60% overall power efficiency delivering 12 W peak output power over a 10 MHz bandwidth 64-QAM test signal. Moreover, an envelope elimination a restoration (EER) structure for the S-band has been evaluated, achieving 43% power efficiency at 9.4 W peak output power for the tested 64-QAM digital modulation. The linearity performance obtained from the transmitter are 4.68% error vector magnitude (EVM) and 34 dB adjacent channel power ratio (ACPR), without applying any predistortion-based correction technique. I. I
An envelope amplifier prototype intended for highefficiency linearization techniques in radiofrequency transmitters is shown in this paper. The amplifier is based on a four levels power supply Class-G amplifier topology. The implemented prototype performs 60% overall power efficiency delivering 12 W peak output power over a 10 MHz bandwidth 64-QAM test signal. Moreover, an envelope elimination a restoration (EER) structure for the S-band has been evaluated, achieving 43% power efficiency at 9.4 W peak output power for the tested 64-QAM digital modulation. The linearity performance obtained from the transmitter are 4.68% error vector magnitude (EVM) and 34 dB adjacent channel power ratio (ACPR), without applying any predistortion-based correction technique. I. I Read More
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