The use of a vertically oriented rod antenna is requested by several standards for the measurement of radiated emissions below 30 MHz both from civil and military equipment. In all the cases, the measurements are performed with the antenna at short electrical distances from the equipment under test. The measurement results depend on the geometrical and electrical parameters of the setup in a not negligible and complex way. For this reason, during the years technical committees have tried to define a setup with boundary conditions able to provide the same measurement results whenever repeated. To that end, different bonding solutions for the counterpoise of the rod antenna have been proposed, obtaining different advantages and drawbacks. In this framework, in this article the authors describe the results of numerical and experimental analysis activities performed on the spatial distribution of the electric field under measurement in the proposed measurement setup. The activities have been done in order to define the optimal operative conditions that allow to obtain measurement results providing a faithful representation of the disturbance field generated by the equipment under test in undisturbed conditions, i.e., the field under measurement. Experimental activities have been performed with an innovative rod antenna with an integrated receiver that can also be operated in a completely isolated mode by using an optical fiber interconnection for its remote control.

中文翻译：

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关于辐射发射棒天线测试装置中的电场分布：数值分析和实验验证

几个标准要求使用垂直定向的杆状天线来测量来自民用和军用设备的 30 MHz 以下的辐射发射。在所有情况下，测量都是在距离被测设备电气距离较短的天线上进行的。测量结果以不可忽略和复杂的方式取决于设置的几何和电气参数。出于这个原因，多年来技术委员会一直试图定义一个边界条件设置，只要重复就能够提供相同的测量结果。为此，针对杆状天线的地网提出了不同的接合解决方案，获得了不同的优点和缺点。在这个框架中，在本文中，作者描述了在建议的测量设置中对被测电场的空间分布进行的数值和实验分析活动的结果。完成这些活动是为了定义最佳操作条件，以获得测量结果，提供真实表示在未受干扰条件下由受测设备产生的干扰场，即被测场。实验活动是使用带有集成接收器的创新杆状天线进行的，该天线也可以通过使用光纤互连进行远程控制以完全隔离的模式运行。完成这些活动是为了定义最佳操作条件，以获得测量结果，提供真实表示在未受干扰条件下由受测设备产生的干扰场，即被测场。实验活动是使用带有集成接收器的创新杆状天线进行的，该天线也可以通过使用光纤互连进行远程控制以完全隔离的模式运行。完成这些活动是为了定义最佳操作条件，以获得测量结果，提供真实表示在未受干扰条件下由受测设备产生的干扰场，即被测场。实验活动是使用带有集成接收器的创新杆状天线进行的，该天线也可以通过使用光纤互连进行远程控制以完全隔离的模式运行。