八字形槽漏泄同轴电缆耦合损耗仿真分析

摘要

Leaky coaxial cable is widely used in confined areas such as subways,tunnels,underground malls,mines and other buildings in blind zones.It requires different electrical properties due to different applications.Therefore,analyzing factors that affect the leaky coaxial cable coupling loss and other electrical properties,and exploring their variation rules,have important application value in engineering.The rules of coupling loss varying with the angle,length and pitch of eight-shaped slots are simulated and analyzed.A method for adjusting the slot pitch is proposed with changing the distance of the adjacent eight-shaped slot pairs,while unchanging the geometrical structure parameters of a single eight-shaped slot pair.An actual calculation example using this method is given subsequently,and simulation results are consistent with the experimental results.%广泛应用于地铁、隧道、地下商场、矿井等闭域空间的漏泄同轴电缆,因不同应用环境对其电气性能要求不同,因此分析影响漏泄同轴电缆耦合损耗等电气性能的因素、探索其变化规律,具有重要的工程应用价值。文中分析了八字形槽孔漏泄同轴电缆耦合损耗随槽孔角度、长度和槽孔节距的变化规律,提出保持单八字形槽孔对几何结构参数不变,仅改变相邻八字形槽孔对之间距离的槽孔节距调节方法。给出了采用此种方法的实际设计算例,仿真结果与实测结果吻合。