“微波技术基础”课程中的增量电感法

衰减常数是微波传输线的重要特性参数。精确计算传输线的导体损耗衰减常数需要分析特定模式的电磁场并在导体表面积分。增量电感法将TEM或准TEM模导体损耗衰减常数的计算等效为特性阻抗对几何尺寸的偏导问题，简化分析过程。本文以同轴、带状线、微带线为例，阐述了增量电感法的原理、应用方法、适用范围，并加以讨论。

Incremental Inductance Method in Fundamentals of Microwave Technology Course

The attenuation constant is an important characteristic parameter of a microwave transmission line. In or-der to accurately calculate the attenuation constant due to conductor loss,the analysis of electromagnetic fields mo-dal and the integration on conductor surfaces are required. The incremental inductance method can significantly simplify the analysis by transforming the field calculation to the partial differential of characteristic impedance to the geometric parameters. With the examples of coaxial line,stripline and microstrip line,this paper explains the prin-ciple of incremental inductance method and discusses its applications and corresponding applicable scopes.