电子学报 ›› 2015, Vol. 43 ›› Issue (6): 1174-1178.DOI: 10.3969/j.issn.0372-2112.2015.06.020

• 科研通信 • 上一篇    下一篇

金属接触非线性引起的无源互调效应的数值分析

毛煜茹1, 刘莹2, 谢拥军1, 程志华1, 王新波3, 李韵3   

  1. 1. 北京航空航天大学电子信息工程学院, 北京 100191;
    2. 西安电子科技大学天线与微波技术重点实验室, 陕西西安 710071;
    3. 中国空间技术研究院西安分院空间微波技术国家重点实验室, 陕西西安 710100
  • 收稿日期:2014-02-24 修回日期:2014-06-28 出版日期:2015-06-25
    • 作者简介:
    • 毛煜茹 女,1984年生于山西晋城.现为北京航空航天大学电子科学与技术博士研究生.研究方向为计算电磁学、天线工程等. E-mail:maoyuru218@126.com;刘 莹 女,1980年生于湖北武汉.现为西安电子科技大学博士研究生.研究方向为电磁兼容、天线与微波技术及电磁场数值算法.谢拥军 男,1968年生于陕西西安.现为北京航空航天大学教授、博士生导师.研究方向为计算电磁学、太赫兹技术与天线工程等.

Numerical Analysis of Passive Intermodulation Due to Metallic Contact Nonlinearity

MAO Yu-ru1, LIU Ying2, XIE Yong-jun1, CHENG Zhi-hua1, WANG Xin-bo3, LI Yun3   

  1. 1. School of Electronic and Information Engineering, Beihang University, Beijing 100191, China;
    2. Key Laboratory of Antenna and Microwave Technology, Xidian University, Xi'an, Shaanxi 710071, China;
    3. National Key Laboratory of Space Microwave Technology, China Academy of Space Technology (Xi'an), Xi'an, Shaanxi 710100, China
  • Received:2014-02-24 Revised:2014-06-28 Online:2015-06-25 Published:2015-06-25

摘要:

针对时域物理光学方法求解无源互调问题的局限性,提出基于"场路结合"的数值分析方法,建立非线性金属结的等效电路模型并将其引入到全波方法中,通过全波方法与等效电路相结合的方式来分析系统的无源互调干扰.计算实例表明,该方法可以精确地计算由于金属接触非线性引起的无源互调及其作为二次辐射源所激发的电磁场,避免了时域方法在电大尺寸问题上计算的积累误差以及只能对处于远场区的简单微波结构的无源互调效应进行求解的问题.本文提出的场路结合数值分析方法为微波部件无源互调效应的研究提供了新的思路与方法.

关键词: 场路结合, 等效电路模型, 电磁数值分析, 无源互调

Abstract:

A new numerical method for the study of passive intermodulation is presented against the limitations of time-domain physical optics(TD-PO).The equivalent circuit model of the metal junction that introduced into the full-wave method is established.The passive intermodulation products and the electromagnetic field excited by passive intermodulation products as secondary sources can be analyzed by full-wave method with nonlinear circuit model.Compared with the time-domain physical optics, the proposed method can eliminate the accumulated error from time iteration on objects large in term of wavelength, and can be applied on complicated microwave structures.The numerical results demonstrate the effectiveness of the method in this paper which provides a new method for the analysis of nonlinear problem.

Key words: coupled field-circuit, equivalent circuit model, electromagnetic simulation, passive intermodulation

中图分类号: