Title :
Simplified Doherty power amplifier structures
Author :
Han Ren ; Jin Shao ; Arigong, Bayaner ; Mi Zhou ; Song Fu ; Jun Ding ; Hyoungsoo Kim ; Hualiang Zhang
Author_Institution :
Univ. of North Texas, Denton, TX, USA
Abstract :
We present two simplified Doherty power amplifier (DPA) structures to eliminate a quarter-wavelength impedance inverter used in the conventional DPA structure. The simplified DPA structures reduce the number of the impedance inverters, therefore they can be easily adopted in the broadband/multi-band applications of the DPA. To prove the design concept of the simplified DPA structures, a dual-band DPA based on one of the proposed structures is designed and fabricated. The designed dual-band DPA provides 76.3% drain efficiency (DE) at the full output power (39.8 dBm) and 54.5% DE at 6 dB of output power back-off (OBO) at 600 MHz, and it also provides 54% drain efficiency (DE) at the full output power (40.2 dBm) and 37% DE at 6 dB of output power back-off (OBO) at 1000 MHz.
Keywords :
integrated circuit design; integrated circuit manufacture; invertors; power amplifiers; Doherty power amplifier; drain efficiency; frequency 1000 MHz; frequency 600 MHz; impedance inverters; output power back-off; quarter-wavelength impedance inverter; Dual band; Gain; Impedance; Impedance matching; Inverters; Power amplifiers; Power generation; Doherty power amplifier; dual-band; gallium nitride (GaN); simplified Doherty structure;
Conference_Titel :
Wireless and Microwave Circuits and Systems (WMCS), 2015 Texas Symposium on
Conference_Location :
Waco, TX
DOI :
10.1109/WMCaS.2015.7233219
