Simulation of Four-Stage Doherty Power Amplifier Structure

Jun Chen; Hua Wei Yang; Kai Xiong Su

doi:10.4028/www.scientific.net/AMM.278-280.1095

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 278-280Simulation of Four-Stage Doherty Power Amplifier...

Simulation of Four-Stage Doherty Power Amplifier Structure

Abstract:

In order to improve the efficiency of Digital TV transmitter, we uses a new type of four-stage Doherty structure. Based on the transmission line theory and active loadpull theory, we deduce the principle of the four-stage Doherty structure, and use ADS to design a four-stage Doherty power amplifier. The simulation result shows that this four-stage Doherty PA has an efficiency of 34% at 6dB back-off (53dBm) for DVB-T OFDM 64 QAM modulated signal. The ACPR and MER obtained at 53dBm when output power are 31dBc and 28dB respectively.

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Periodical:

Applied Mechanics and Materials (Volumes 278-280)

Pages:

1095-1098

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.278-280.1095

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Online since:

January 2013

Authors:

Jun Chen, Hua Wei Yang, Kai Xiong Su

Keywords:

Four-Stage Doherty, Power Amplifier, Simulation

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References

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