본 논문은 일반적인 Doherty amplifier보다 더 작은 부하저항을 갖도록 설계하였으며 출력 정합 회로에 PBG구조를 적용하여 IMD(Inter-modulation Distortion)를 억제 시키고 PAE (Power Added Efficiency)를 향상시켰다. 본 논문에서 제안된 전력 증폭기는 기존의 Doherty 전력 증폭기를 기준으로 IMD3는 5.5 dEC, PAE는 $5\%,$ 최대 출력 전력은 8dB back-off point 에서 $18\%$의 성능 개선을 시켰다.
In this paper, smaller load has been used compared with the conventional Doherty amplifier and PBG structure have been employed to suppress IMD (Inter-modulation Distortion) and improve PAE (Power Added Efficiency). And The PBG structure has been employed on the output macthing network of Doherty amplifier. The proposed power amplifier has been improved more the IMD3 by 5.5 dBc, and the average PAE by $5\%,$ at peak output power, $18\%$ at 8dB back-off point respectively than the conventional Doherty power amplifier.
