摘要
介绍了利用微扰法和传输线理论推得反射系数与复介电常数的关系表达式的方法。此问题所采用的微扰法用于计算波导中传播常数7由于微小改变引起的变动。当介质柱直径过大时，微扰法便不再适用。于是介绍了一种通过测量反射系数、基于矩量法和本征值法来计算柱体复介电常数￡的方法。
A method based on transmission line theory and perturbation analysis to derive the relationship between complex permittivity and reflection coefficient is introduced. The perturbation analysis in the problem is used to calculate the tiny variation of the transmission constant caused by the tiny variation in the waveguide. At extremely big diameter of cylinder, the perturbation analysis is no longer applicable. Therefore, an algorithm based on method of moments and eigenvalue analysis for computing the complex permittivity of the cylinder from the measurement of reflection coefficient is introduced.
出处
《飞行器测控学报》
2008年第1期53-56,共4页
Journal of Spacecraft TT&C Technology
关键词
微波测量
复介电常数
矩形波导
微扰法
Microwave Measurement
Complex Permittivity
Rectangular Waveguide
Perturbation Analysis
