摘要
研制出一种L波段大功率、高合成效率、高效率的平衡式功率放大器,电路设计采用三级级联结构,根据负载牵引得到晶体管的输入输出阻抗实现共轭匹配,并采用3 dB分支线型耦合器对平衡式放大器的信号进行分配与合成。保证两路信号幅相一致,测得结果为:工作频率为1.5 GHz时,1 dB压缩点输出功率42.73 dBm,增益在60 dB以上,合成效率约为93%,PAE为48.7%。同时,采用计算分析的方法讨论了两路合成信号的幅度、相位不平衡及合成器电路损耗对合成效率的影响,并进行了实际的测试。
A three-stage L-band balanced power amplifier with large output power, high combining-efficiency and high PAE was presented. The input and output impendence of power transistor were achieved through the load-pull desiging method to realize the conjugated matching in ADS. A 3 dB Branch Line Hybrid Coupler was employed to split and combine the signal. From the measured results ,the P-1 was 42.73 dBm with the power gain over 60 dB at 1.5 GHz,the combining-efficiency of 93% and the PAE of 48.7% was achieved as well. The influences caused by insertion loss, amplitude unbalance and phase unbalance which were generated by power amplifiers were investigated both though simulation method and practical measurment.
出处
《电子器件》
CAS
2011年第6期672-676,共5页
Chinese Journal of Electron Devices
基金
国家重点基础研究发展计划(973计划)项目(2011CBA00600)
国家自然科学基金项目(61106106)
中央高校基本科研业务费专项基金(K50510250006)
关键词
平衡式
ADS
合成效率
幅相一致性
balanced structure
ADS
combining efficiency
indentity of amplitude and phase
