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本文建立了关于螺旋皱纹内、外导体同轴电缆特性阻抗不均匀性的理论。从缓变的近似圆截面导体模型出发,利用区域变分法和黎卡迪方程,推导出计算特性阻抗和电压反射系数的近似解析表达式,系统分析了电缆设计、制造和安装等实际问题。
In this paper, a theory about the characteristic impedance nonuniformity of the coaxial cable inside and outside the spiral wrinkle is established. Based on the gradual change of approximate circular cross-section conductor model, the approximate analytic expression for calculating characteristic impedance and voltage reflection coefficient is deduced by using the method of variation of area and the Ricardian equation. The practical problems of cable design, manufacture and installation are systematically analyzed.