几种传输线的场分布

求开放平板线、外正三角形內圆同轴线、外方內圆同轴线、外正六边形內圆同轴线的特性阻抗而建立的精确保角变换的基础上,本文进一步讨论了显式逆变换函数,从而求得了这几种传输线的场分布的闭合表达式。由于所用保角变换的精确性,所得的显式场分布在内导体和外导体的内接圆尺寸之比小于0.5in。基本上是准确的,在这个尺寸比稍大些时也可作为参考。这些场分布对于了解传输线的功率容量,计算衰减常数,考虑功率耦合,设计有关的有源器件等都是必不可少的。文中获得的几种传输线的场分布的显著特点是计算方便,在一般实用范围內有足够的精度。

FIELD DISTRIBUTIONS OF SOME TRANSMISSION LINES

Explicit inversions of the accurate conformal transformations that authors presented previously for determinating the characteristic impedances of unscreened slab-line, triangular slab-line, Square slab-line, and hexagonal slab-line are derived to express the field distributions of these lines in closed form. The expressions for the field distributions are virtually exact for small even moderate dimension ratio because of the high accuracy of employed transformations. These field distributions are necessary for investigating the power capacities,calculating the attenuation constants, considering the energy coupling, and designing related active devices. The outstanding advantages of the results presented in this paper are the convenience and accuracy in computation for many practical situations.