Doherty amplifier

Doherty amplifier

[′dō·ərd·ē ‚am·plə‚fī·ər]
(electronics)
A linear radio-frequency power amplifier that is divided into two sections whose inputs and outputs are connected by quarter-wave networks; for all values of input signal voltage up to one-half maximum amplitude, section no. 1 delivers all the power to the load; above this level, section no. 2 comes into operation.
References in periodicals archive ?
Ampleon announced the launch of the BLF888E RF power transistor designed for DVB-T UHF asymmetrical wideband Doherty amplifier applications.
Piazzon, "Design of a dual-band GaN Doherty amplifier," Proc.
The conduction angle of the class-C biased peaking device has important role on the efficiency, gain, power and linearity characteristics of the overall Doherty amplifier. The gain degradation of the ADPA in the load modulation region where the class-C biased peaking device starts to conduct results in poorer power-added efficiency.
Jeong, "A highly linear and efficient three-way Doherty amplifier using two-stage GaN HEMT cells for repeater systems," Microwave and Optical Technology Letters, Vol.
Techniques such as Doherty amplifier structures extend high-efficiency device operation to lower power levels, allowing for significantly improved average PA efficiency.
This article presents a Doherty amplifier with a bias adaptation technique based on a software-defined radio (SDR) transmitter architecture.
Edmund Neo, "A high-efficiency 100-W GaN three-way Doherty amplifier for base-station applications," IEEE Trans.
This article proposes a new type of power combining network for a Doherty amplifier based on the use of short transmission lines and lumped capacitors.
In the second paper, a 240 W Doherty amplifier at 2 GHz for WCDMA is described.