摘要
采用自适应偏置技术和有源电感实现了一款输出匹配可调的、高线性度宽带功率放大器(PA)。自适应偏置技术抑制了功放管直流工作点的漂移,提高了PA的线性度。有源电感参与输出匹配,实现了输出匹配可调谐,该策略可调整因工艺偏差、封装寄生造成的输出匹配退化。利用软件ADS对电路进行验证,结果表明,在4 GHz频率下,输入1dB压缩点(Pin 1dB)为-7dBm,输出1dB压缩点(Pout 1dB)为11dBm,功率附加效率(PAE)为8.7%。在3.1GHz^4.8 GHz频段内,增益为(20.3±1.1)d B,输入、输出的回波损耗均小于-10dB。
A broadband power amplifier（ PA） was designed by adopting adaptive bias technique and active inductor.Adaptive bias technique effectively enhanced the power amplifier linearity by inhibiting DC operation point drifting of transistor. Active inductor participated in output matching realized output matching tuneability,this scheme could adjust output matching degradation due to process deviation and packaging parasitics. The PA was verified by simulation tool ADS. The results indicated the power amplifier had input 1dB compression point（ Pin 1dB） of- 7dBm,output 1dB compression point（ Pout 1dB） of 11d Bm at 4 GHz,and power added efficiency（ PAE） of 8. 7%. Over the frequency range of 3. 1 GHz ~ 4. 8 GHz,the power amplifier showed a gain of 20. 3dB with the gain flatness of 1. 1d B,the input and output return loss are all less than- 10dB.
出处
《电子器件》
CAS
北大核心
2015年第2期321-326,共6页
Chinese Journal of Electron Devices
基金
北京市自然科学基金项目(4142007)
山东省高等学校科技计划项目(J13LN09)
