一种S波段新型的模拟预失真电路  

A New Type of S-band Analog Predistortion Circuit

作　　者：卢玉龙 LU Yu-long(Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学信息科学与工程学院,宁波315211

出　　处：《无线通信技术》2022年第1期48-51,共4页Wireless Communication Technology

基　　金：国家重点实验室开放基金(K202115)。

摘　　要：传统的并联肖特基二极管(Schottky diode,SD)对的模拟预失真(analog predistortion,APD)电路,其可调性不高,产生的非线性信号有限。为了解决上述问题,基于传统的并联肖特基二极管(Schottky diode)对的基础上,提出了一种共源级场效应晶体管(field effect transistor,FET)和并联肖特基二极管对串联结构的新型模拟预失真电路。该模拟预失真电路可调参数多,产生的非线性信号更强。通过改变场效应晶体管的偏置电压、肖特基二极管对的偏置电压、无源传输线的电长度得到不同的幅度和相位曲线,从而使整个预失真网路具有更好的适应性。实验结果表明,在3.5GHz时,所设计的模拟预失真电路能够实现5dB的幅度扩张和接近50度的相位扩张。The traditional analog predistortion(APD)circuit of parallel Schottky diode(SD)pairs has low adjustability and limited non-linear signals.In order to solve the above problems,based on the traditional parallel Schottky diode(Schottky diode)pair,a new type of common source-level field effect transistor(FET)and parallel Schottky diode pair in series structure is proposed.The analog predistortion circuit has many adjustable parameters and produces stronger nonlinear signals.By changing the bias voltage of the field effect transistor,the bias voltage of the Schottky diode pair,the electrical length of the passive transmission line,different amplitude and phase curves can be obtained,so that the entire predistortion network has better adaptability.Experimental results show that at 3.5 GHz,the designed analog predistortion circuit can achieve a 5dB amplitude expansion and a phase expansion close to 50 degrees.

关 键 词：模拟预失真 场效应晶体管 肖特基二极管 幅度扩张 相位扩张 

分 类 号：TN92[电子电信—通信与信息系统]