室内天线及漏缆辐射场分布的计算与比较

作为一种场强覆盖手段,漏泄同轴电缆不但能够应用于隧道无线通信系统,而且近年来也被应用于室内无线通信系统。本文从场强叠加原理出发,利用射线追踪法分别计算了由天线和漏缆产生的场强覆盖,得出了天线位置能在很大程度上影响室内场强分布、漏缆所产生的场分布比天线的更为均匀,工作在单模辐射状态下的漏缆比多模辐射时所产生的场分布更均匀等重要结论。本文结果对于室内电波覆盖的进一步研究有参考价值。

Calculation and Comparison of the Field Distributions of the Indoor Antenna and Leaky Coaxial Cable

As one of the field coverage methods, leaky coaxial cables can be used not only in the wireless communication systems in tunnels, but also in to the indoor wireless communication systems. In this paper, starting from the field superposition principle of the linear system, we calculate the field coverages of the indoor antenna and the leaky coaxial cable respectively by the ray-tracing method. Field distributions on planes at different heights from the ground and with different antenna locations are calcu lated, and compared with those from the leaky coaxial cables. It is found that the location of the indoor antenna has significant effect on the field coverage, and the field coverage of the leaky coaxial cable is smoother than that of the antenna. In addition, leaky coaxial cables working in the mono-harmonic radiation mode can give more uniform field coverage than that of the cables working in the multi-harmonic mode. The results of this paper are valuable to further research of indoor radio coverage.