2010•Journal of MicrowavesRequires access
Design of Inverted Doherty Power Amplifier with Class-E Peaking Amplifier
Liao Zhong-yu
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Abstract
The class-E amplifier is used as peaking amplifier in place of class-C amplifier in traditional inverted Doherty amplifier to obtain higher power-added efficiency.The load network of class-E peaking amplifier consists of one impedance matching circuit and two harmonic suppression circuits.By analyzing,the design procedure is derived,and to validate the analysis,a 38dBm inverted Doherty amplifier with class-E peaking amplifier was designed and fabricated at 1.96 GHz.The simulation results show that 11.5% and 1.1% power-added efficiency improvement is obtained in comparison with balanced class-AB amplifier and traditional inverted Doherty amplifier at an output power of 38dBm respectively.The second and third harmonic suppressions were measured to be more than 36dB and 30dB,respectively,at output power ranges from 24dBm to 38dBm.