中央广播电视发射塔环境电磁辐射测试研究  

On the Environment Tests of Electromegnetic Radiation to the Central Broadcasting Television Emitting tower Located.

作　　者：王毅[1] 麻桂荣[1] 

机构地区：[1]北京市环境保护监测中心

出　　处：《中国环境监测》1997年第4期11-15,共5页Environmental Monitoring in China

摘　　要：对发射７套电视节目和５套调频节目，发射总功率２４０ＫＷ的中央广播电视塔电磁辐射场强监测结果表明：（１）由于节目频率不同，发射机功率及发射天线形式、高度、增益不同，电磁波到达地面最大场强值的距离是不同的；在近距离内高层建筑各层所接收到的场强大小也是不同的。（２）电视与调频信号在近距离昼夜电平无明显变化。（３）电视塔周围２０００米内环境综合场强最大值为２８４～３２８μＷ／ｃｍ２，所有环境测量值均小于公众导出限值４０μＷ／ｃｍ２。After testing electromagnetic field density of the central broadcasting & television emitting tower,which emits 7 channels of TV programmes and 5 channels of frequency modulation radio programmes,and whose total emitting power reaches 240KW,we sum up the results as follows:1)Because of differences of programmes freguencies,differences of powers of emitting sets and differences of forms,heights and fains of emitting antennas,the distances of electromagnetic wave reaching the maximum ground field density are different.The field densities which are received by different floors of high building short distance away are also differnent.2)The electrical level of TV and F.M.signal have no evident changes at near area day and night.3)The comprehensive environment field density is 2 84 3 28μW/cm 2 within a circumference of 2000m from the emitting tower.All testing values are below the public limited one:40μW/cm 2.

关 键 词：电磁辐射 时空分布 环境监测 测试 

分 类 号：X837[环境科学与工程—环境工程]