城市电视电波传播特性探讨

RESEARCH ON THE PROPAGATION CHARACTERISTIC OF CITY TV RADIO WAVE

选取矩形柱体作城市楼房模型。利用广州14频道电视电波测量楼房外墙反射系数模,确定其等效电参量。用一致性几何绕射理论计算直角导电直劈绕射场,与实测数据进行比较。根据反射系数模曲线、直角劈绕射场曲线,对城市电视电波传播特性进行探讨,估计可能产生的重影。

In this paper,a rectangle column is selected to simu-late the city building.Its equivalent electrical parameter is deter-mined according to the modulous of reflection coefficient,whichis obtained from measuring the radio wave reflected from the wallof a building with the TV wave radiated from channel 14 of Guang-zhou.Diffraction field for a right angle conducting wedge iscalculated in accordance with uniform geometrical theory of diff-raction,and the gotten result is compared with the data obtainedfrom the measuring in site.On the basis of the modulous curves ofreflection coefficient and diffraction field curves of the right anglewedge,we probe into the propagation characteristic of city TV waveand estimate the probably produced ghost as well.