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.
作者
张轶
ZHANG Yi(Shanghai Technology Center of Radiation Environment Safety,Shanghai 200065,China)
出处
《长江信息通信》
2022年第2期47-50,共4页
Changjiang Information & Communications
关键词
中波广播
辐射电阻
数值求解
预测模式
Medium wave broadcasting
Radiation resistance
Numerical solution
Prediction model
