电子学报2017，Vol.45Issue(7)：1784-1791,8.DOI:10.3969/j.issn.0372-2112.2017.07.032
一种行波管用毫米波射频预失真线性化器
A Millimeter-Wave RF Predistortion Linearizer for Travelling Wave Tube Amplifier
摘要
Abstract
The RF predistortion is an effective method to improve the linearity of High Power Amplifier (HPA).To obtain a better linearity of the HPA,accurate amplitude and phase compensation are required.A novel RF predistortion circuit is proposed for the linearization of a Ka-band Travelling Wave Tube Amplifier (TWTA),which consisted of a prepositive Variable Gain Amplifier (VGA),a post VGA and a nonlinear signal generating module based on vector synthesis technique.Changing the gain of the two VGAs can realize the adjustment of the compensation range.Reasonably changing the bias voltages of the two branches in nonlinear generating module can adjust the compensation amount and can also independently regulate the amplitude or phase characteristic.The Third Order Intermodulation (TOI) of a Ka-band TWTA is improved by 11.5 dB at 6dB output power back-off owing to the proposed RF predistortion linearizer.关键词
行波管放大器/射频预失真/非线性失真/矢量合成Key words
travelling wave tube amplifier/RF predistortion linearization/nonlinear distortion/vector synthesis technique分类
信息技术与安全科学引用本文复制引用
邓海林,张德伟,白维达,周东方,张毅,吕大龙..一种行波管用毫米波射频预失真线性化器[J].电子学报,2017,45(7):1784-1791,8.基金项目
国家"核高基"重大专项 （）
