Analysis and Design of an Asymmetric Doherty Power Amplifier at 2.6 GHz using GaAs pHEMTs

被引：3
|
作者：
Grams, Valentin [1 ]
Seidel, Andres [1 ]
Staerke, Paul [1 ]
Wagner, Jens [1 ]
Ellinger, Frank [1 ]
机构：
[1] Tech Univ Dresden, Chair Circuit Design & Network Theory, Dresden, Germany
来源：
2019 IEEE INTERNATIONAL CONFERENCE ON MICROWAVES, ANTENNAS, COMMUNICATIONS AND ELECTRONIC SYSTEMS (COMCAS) | 2019年
关键词：
Asymmetric Doherty power amplifier; N-Way Doherty power amplifier; efficiency enhancement techniques;
D O I：
10.1109/comcas44984.2019.8958384
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This work presents an analytical guideline for the design of N-way Doherty power amplifiers operating at an output back-off (OBO) larger than 6 dB. Using this concept, an asymmetric Doherty power amplifier (ADPA) is designed for efficient transmission of signals with a high peak to average power ratio (PAPR) of 8.5 dB. Both the main and peak amplifier consist of the discrete GaAs pHEMT TGF2025 from Qorvo. The ADPA achieves an output power of 28.5 dBm with a power added efficiency (PAE) of 56.0 % at 2.6 GHz. At the back off power (BOP) of 20.0 dBm, the PAE reaches its first local maximum which is equal to 50.0 %. The bandwidth of the circuit corresponding to a power gain reduction of 1 dB is 200 MHz.
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页数：3
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