一种S波段高效谐波调谐功率振荡器设计  

Design of an S-band high-efficiency harmonic-tuned power oscillator

作　　者：曹宇 刘长军[1] 郑位春 黄凯 CAO Yu;LIU Changjun;ZHENG Weichun;HUANG Kai(School of Electronics and Information Engineering,Sichuan University,Chengdu 610064,China;Zhongquantong Tech.Co.,Yibin 644000,China)

机构地区：[1]四川大学电子信息学院,四川成都610064 [2]中全通技术有限公司,四川宜宾644000

出　　处：《应用科技》2023年第4期53-58,共6页Applied Science and Technology

基　　金：国家自然科学基金项目(62071316)。

摘　　要：为了解决微波无线输能系统中微波源的小型化和高效率需求,提出了一种高效谐波调谐功率振荡器的设计方法,振荡器由晶体管、谐波控制网络、反馈网络和负载网络组成。首先,通过调谐晶体管谐波阻抗以减少漏极电压与电流波形的重叠,从而提高其效率;其次,反馈网络与负载网络使用仿真获得的数据合成,两者可独立设计,避免了反馈回路对振荡器输出效率的影响。使用Cree CGH40010F GaN HEMT设计并制作了一款工作在S波段的高效功率振荡器,测试结果表明振荡器在2.445 GHz下成功实现了41.7 dBm的输出功率和79.9%的直流到射频(direct current to radio frequency,DC-RF)转化效率,在偏移载波1 MHz处,相位噪声低至-136 dBc/Hz。该功率振荡器性能优越,在微波无线能量传输系统中具有良好的应用前景。To achieve miniaturization and high efficiency of microwave sources in microwave wireless power transmission systems,a high-efficiency harmonic-tuned power oscillator design method is proposed,which consists of a transistor,a harmonic control network,a feedback network and a load network.First,the efficiency of the transistor is improved by tuning its harmonic impedance to reduce the overlap between the drain voltage and current waveforms;and further,the data of feedback and load networks,which are synthesized using data obtained from simulations,can be designed independently,avoiding the effect of feedback loop on the output efficiency of the oscillator.A high-efficiency oscillator using Cree CGH40010F GaN HEMT was designed and fabricated for measurement.The result illustrates that the fabricated oscillator has achieved an output power of 41.7 dBm and the direct current to radio frequency(direct current to radio frequency,DC-RF)power conversion efficiency of 79.9%at 2.445 GHz,and the phase noise is also as low as–136 dBc/Hz at 1 MHz offset,which presents good future applications in the microwave wireless power transmission system.

关 键 词：高效率 功率振荡器 谐波调谐 S波段 阶梯阻抗谐振器 相位噪声 

分 类 号：TN455[电子电信—微电子学与固体电子学]