基于矢量测量的射频微波器件非线性参数化行为建模技术评述

Review of nonlinear behavioral modeling for RF microwave devices based on vectorial measurement

随着大功率射频微波器件的不断推广与应用,以及无线通信市场的迅猛发展,传统的小信号S参数线性系统理论既无法继续支持对大功率、高效率、复频谱利用率和超宽带等众多射频电子产品高效快速的研发,也不能满足无线系统前端——射频功率放大器、混频器、调制解调器和振荡器等部件的精确表征、建模、仿真、设计和应用的迫切要求,正是在这种大背景下,基于矢量测量的射频/微波器件非线性参数化行为建模技术也就应运而生。本文首先阐述非线性器件表征技术的发展背景与迫切性;然后介绍了该领域内逐渐成熟的两种矢量测量方案与核心技术的原理,并分析比较了两种方案的性能优劣;最后重点对三种非线性参数化行为模型的数学形式作了详细推演,介绍了参数提取方法和应用实例,展望了基于矢量测量的非线性行为建模技术的未来发展研究方向。

With the continuous popularization and application of high-power RF microwave devices and the rapid de- velopment of wireless communication market, traditional small-signal S-parameter linear system theory can neither continue to support efficient and fast R ＆ D of the RF electronic products with high-power, high-efficiency, complex spectrum and ultra-wideband, nor meet the urgent requirements of precise characterization, modeling, simulation, de- sign and application for wireless front-end systems, such as RF power amplifier, mixer, modem, oscillator and other components. The vectorial measurement-based nonlinear parametric behavioral modeling technology for RF/micro- wave device is proposed under this background. This paper firstly describes the development background and urgency of nonlinear device characterization technology;then introduces the principles of two gradually matured vectorial measurement schemes and core technologies;and analyzes and compares the advantage and disadvantage of the two schemes. Finally, the mathematical formats of three nonlinear parametric mathematical behavioral models are deduced emphatically, and the parameter extraction methods and application examples are presented. Besides, the future devel- opment direction of the nonlinear behavior modeling technique based on vectorial measurements is also forecasted in this paper.