Ka频段氮化镓功放的预失真线性化器设计
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摘要
基于满足目前高效复杂的调制技术对功率放大器线性化度越来越高的需求的目的,采用模拟预失真技术设计了一种线性化器,用来改善Ka频段氮化镓(GaN)固态功率放大器的非线性化失真;通过改进传统的并联式二极管预失真电路,采用开环技术,将两个肖特基二极管并联;改变二极管的偏置状态,得到不同的改善程度的预失真信号;结合使用专用电磁仿真软件ADS2013做电路仿真,通过参数扫描得到二极管偏置状态的初始值,为实物调试提供理论基础;通过对已加工的实物测试,结果表明:增益幅度补偿达到6.4dB,相位补偿达到28°。
Based on the current high efficiency and complex modulation technology,the demand for the linearization of power amplifier is higher and higher,a linearizer using analog pre-distortion is proposed in this paper to improve the non-linear distortion of GaN power amplifier at Ka-band.It is improved on the basis of traditional pre-distorter and composed of two parallel Schottky diodes using open loop method.It can generate the distorted signals which are on different degree of improvement through changing the offset state of the diode.The initial value can be gained by using the ADS2013 which is specialized electromagnetic simulation software.Then the value gained provides the theoretical basis for physical object debug.The physical object tests show that the linearizer can provide 6.4 dB gain expansion and 28°phase expansion.
Based on the current high efficiency and complex modulation technology,the demand for the linearization of power amplifier is higher and higher,a linearizer using analog pre-distortion is proposed in this paper to improve the non-linear distortion of GaN power amplifier at Ka-band.It is improved on the basis of traditional pre-distorter and composed of two parallel Schottky diodes using open loop method.It can generate the distorted signals which are on different degree of improvement through changing the offset state of the diode.The initial value can be gained by using the ADS2013 which is specialized electromagnetic simulation software.Then the value gained provides the theoretical basis for physical object debug.The physical object tests show that the linearizer can provide 6.4 dB gain expansion and 28°phase expansion.
引文
[1]李大伟.毫米波预失真线性化技术研究[D].成都:电子科技大学,2015.
[2]李大伟,张旭阳,谢小强,等.一种用于毫米波功放的新型宽带预失真线性化器[J].微波学报,2014(1):148-151.
[3]Chung Y,Deckman B C,Delisio M P.Linearization of a SpatiallyCombined X-Band 100-W GaAs FET Power Amplifier System with Predistortion Linearizer[C].Compound Semiconductor Integrated Circuit Symposium(CSICS),2012IEEE.
[4]周睿.毫米波模拟预失真线性化技术研究[D].成都:电子科技大学,2013.
[5]张旭阳.毫米波模拟预失真线性化技术研究[D].成都:电子科技大学,2014.
[6]韩冰,晋东立.功放预失真中自适应算法研究[J].无线电通信技术,2015,41(6):76-78.
[7]刘传洋,蓝永海.L频段高效功率放大器设计[J].无线电工程,2014,44(4):47-49,61.
[8]Guan L,Zhu A.Green Communications:Digital Predistortion for Wideband RF Power Amplifiers[J].Microwave Magazine,IEEE,2014,15(7):84-99.
[9]李少岚,延波,李晨飞,等.采用二极管的模拟预失真毫米波功放线性化器[J].微波学报,2012,28(1):70-72.
[10]陈亮.预失真线性化射频功率放大器设计[D].广州:华南理工大学,2014.
[11]张云华,李大伟,谢小强,等.一种新型幅相可调预失真器[J].机电元件,2016(2):48-51.
[12]Chung Y,Deckman B C,DeLisio M P.Linearization of a Spatially-Combined X-Band 100-W GaAs FET Power Amplifier System with Predistortion Linearizer[C].Compound Semiconductor Integrated Circuit Symposium(CSICS),2012IEEE.IEEE,2012:1-4.
[13]楚敬峰.射频功率放大器线性化技术研究[D].北京:北京工业大学,2014.
[14]石雯.Ku波段氮化镓功率放大器研究[D].杭州:杭州电子科技大学,2012.
[15]陈文龙.微波功率放大器的线性化设计与实现[D].山东:山东大学,2015.
[16]吴凡.Ka波段功率放大器线性化实现技术研究[D].成都:电子科技大学,2013.
[17]王宇明.微波固态功率放大器及预失真线性化器的研制[D].西安:西安电子科技学,2013.
[18]高茜茜.基于预失真的线性化通道放大器的研究[D].西安:西安电子科技大学,2012.
[19]顾勇.基于数字预失真技术的有记忆功率放大器线性化研究[D].杭州:杭州电子科技大学,2012.
[2]李大伟,张旭阳,谢小强,等.一种用于毫米波功放的新型宽带预失真线性化器[J].微波学报,2014(1):148-151.
[3]Chung Y,Deckman B C,Delisio M P.Linearization of a SpatiallyCombined X-Band 100-W GaAs FET Power Amplifier System with Predistortion Linearizer[C].Compound Semiconductor Integrated Circuit Symposium(CSICS),2012IEEE.
[4]周睿.毫米波模拟预失真线性化技术研究[D].成都:电子科技大学,2013.
[5]张旭阳.毫米波模拟预失真线性化技术研究[D].成都:电子科技大学,2014.
[6]韩冰,晋东立.功放预失真中自适应算法研究[J].无线电通信技术,2015,41(6):76-78.
[7]刘传洋,蓝永海.L频段高效功率放大器设计[J].无线电工程,2014,44(4):47-49,61.
[8]Guan L,Zhu A.Green Communications:Digital Predistortion for Wideband RF Power Amplifiers[J].Microwave Magazine,IEEE,2014,15(7):84-99.
[9]李少岚,延波,李晨飞,等.采用二极管的模拟预失真毫米波功放线性化器[J].微波学报,2012,28(1):70-72.
[10]陈亮.预失真线性化射频功率放大器设计[D].广州:华南理工大学,2014.
[11]张云华,李大伟,谢小强,等.一种新型幅相可调预失真器[J].机电元件,2016(2):48-51.
[12]Chung Y,Deckman B C,DeLisio M P.Linearization of a Spatially-Combined X-Band 100-W GaAs FET Power Amplifier System with Predistortion Linearizer[C].Compound Semiconductor Integrated Circuit Symposium(CSICS),2012IEEE.IEEE,2012:1-4.
[13]楚敬峰.射频功率放大器线性化技术研究[D].北京:北京工业大学,2014.
[14]石雯.Ku波段氮化镓功率放大器研究[D].杭州:杭州电子科技大学,2012.
[15]陈文龙.微波功率放大器的线性化设计与实现[D].山东:山东大学,2015.
[16]吴凡.Ka波段功率放大器线性化实现技术研究[D].成都:电子科技大学,2013.
[17]王宇明.微波固态功率放大器及预失真线性化器的研制[D].西安:西安电子科技学,2013.
[18]高茜茜.基于预失真的线性化通道放大器的研究[D].西安:西安电子科技大学,2012.
[19]顾勇.基于数字预失真技术的有记忆功率放大器线性化研究[D].杭州:杭州电子科技大学,2012.