As various of radio communication technologies are widely adopted in the world, the electromagnetic radiation environment of the buildings becomes more and more complicated, bringing negative impacts on the operation of electronic equipment and human health. 随着各种无线接入技术的广泛应用,城市建筑物内外的电磁辐射环境日益复杂,对电子设备的安全运行和人体健康带来诸多问题。
The City Subway is one of main electromagnetic radiation sources. The paper gives some advices and protective measures to subway car manufacturer and Operation Company combining with project, and then researches the EMC of the equipments and systems of Subway car in microscopic scales. 城市地铁是城市电磁辐射污染源之一,结合工程项目,本文对地铁制造商和地铁运营公司提出电磁兼容规划和管理的建议,和需要采取的电磁辐射防护措施。
Study shows the possibility of electronic receiver to couple considerable lightning electromagnetic energy under lightning radiation circumstance, and in this instance the strong nonlinearity behavior makes against the normal operation of microwave amplifier generally under small-signal condition. 相关研究表明,在雷电电磁辐射环境下电子系统接收机可能耦合较大的雷电电磁能量,将会引起微波放大器表现出强烈的非线性特性,这对于常规工作条件下的微波放大器来说是十分不利的。
The model can give an accurate description of the electromagnetic behavior of antenna within the Wheeler Cap. Good measurement results are obtained, showing that it is an effective method for the measurement of antenna radiation efficiency with easy operation and high accuracy. 改进的天线模型精确地描述了天线位于维勒帽内的电磁特征,测量取得了好的结果,表明这是一种操作简便、测量精度高的测量天线辐射效率的方法。