中波广播台电磁辐射场强预测方法讨论  

Discussion on Prediction Methods of Electromagnetic Field for Medium Wave Radio Station

作　　者：张轶 ZHANG Yi(Shanghai Technology Center of Radiation Environment Safety,Shanghai 200065,China)

机构地区：[1]上海市辐射环境安全技术中心,上海200065

出　　处：《长江信息通信》2022年第2期47-50,共4页Changjiang Information & Communications

摘　　要：基于环评导则(HJ 1112-2020),介绍中波广播天线原理和场强计算方法。计算模式中,辐射电阻是表征天线电磁波辐射能力的重要参数,通过Romberg算法开展辐射电阻数值求解,以天线高度与波长的比值为自变量,给出了垂直接地天线辐射电阻的多项式拟合公式,选择实例说明了计算的可行性。Accordingto the EIA guideline(HJ 1112-2020),the principle and field intensity prediction method of medium wave broadcast antenna areintroduced.In the calculation mode,the radiation resistance is an important parameter to characterize the electromagnetic radiation capability of the antenna.The Romberg algorithm is used to numerically solve the radiation resistance.Taking the ratio of antenna height to wavelength as the independent variable,the polynomial fitting formula of the radiation resistance of the vertically grounded antenna is given.An example is selected to illustrate the feasibility of the calculation.

关 键 词：中波广播 辐射电阻 数值求解 预测模式 

分 类 号：TN828.1[电子电信—信息与通信工程]