CAJ | 학술논문

基于传统两路反向Doherty(Inverted Doherty Power Amplifier, IDPA)在回退点处效率较低的缺点，提出了双向牵引技术与共轭匹配技术联合的设计方法，在传统反向Doherty设计方法上进行优化改进，研制了一款工作于TD-LTE频段(2570MHz~2620MHz)、结构新颖的高效率反向Doherty。实现了在保证高线性度的情况下，使得整体电路在峰值功率输出点以及回退点处都具有较高的效率。在中心频率为2600MHz的仿真结果表明，峰值输出功率(52dBm)和功率回退点(46dBm)处的效率分别高达54.9%和46.9%，回退点处的效率比AB类IDPA提高了14%，在5MHz偏频情况下，三阶互调分量为13.743dBm，与45.958dBm的基波功率相差32.215dB，符合现代功放在功率回退点处具有高效率和高线性度的设计要求。
기우전통량로반향Doherty(Inverted Doherty Power Amplifier, IDPA)재회퇴점처효솔교저적결점，제출료쌍향견인기술여공액필배기술연합적설계방법，재전통반향Doherty설계방법상진행우화개진，연제료일관공작우TD-LTE빈단(2570MHz~2620MHz)、결구신영적고효솔반향Doherty。실현료재보증고선성도적정황하，사득정체전로재봉치공솔수출점이급회퇴점처도구유교고적효솔。재중심빈솔위2600MHz적방진결과표명，봉치수출공솔(52dBm)화공솔회퇴점(46dBm)처적효솔분별고체54.9%화46.9%，회퇴점처적효솔비AB류IDPA제고료14%，재5MHz편빈정황하，삼계호조분량위13.743dBm，여45.958dBm적기파공솔상차32.215dB，부합현대공방재공솔회퇴점처구유고효솔화고선성도적설계요구。
There are some shortcomings at the output power back off of the traditional Inverted Doherty, a meth-od of combining bilateral pull technology with conjugate match technology was proposed. Optimization in the tradi-tional design method of inverted Doherty, a power amplifier with high efficiency which can be used in the frequency range of TD-LTE (2570MHz~2620MHz) is designed and simulated. In the case of a guarantee to achieve high linear-ity, making the overall circuit in peak power output point and back point has a higher efficiency. In the center fre-quency of 2600MHz simulation results show that in the peak output power (52dBm) and power back-off point (46dBm) at up to 54.9%efficiency and 46.9%, respectively. The simulation results show that 14%power-added effi-ciency improvement is obtained in comparison with traditional class-AB inverted Doherty amplifier at the output power back off .In the case of partial frequency 5MHz,the IMD3 of the proposed inverted Doherty amplifier can reach about-32.215dBc,in line with the modern power amplifier with design requirements of high efficiency and high linearity in power back off point.