本文
No.6（2003）6.Development of portable measurement devices using field examination for electromagnetic compatibility
Yukio TERAI, Takashi AMAHAYA, Yasuhiro SHIMIZU and Masuo USUI
Electrical and ISM equipment have come to cause significant degrading of the electromagnetic environment because of their noise radiation in recent years. Therefore, a small portable antenna and a small portable noise simulator were produced for the purpose of field examination for EMC. The small antenna consists of a loop antenna element and log periodic antenna element. These elements were produced from by-products cut-off from double-side-printed circuit boards. It is possible to measure radio frequencies in a range spanning from 30 MHz to 3 GHz. The noise simulator, which utilized the exciting board of an electrodeless fluorescent lamp, was able to judge malfunctions in simple operations to impress electric fields onto objective products. As a result of the field examination, disturbance waves generated from high frequency welders was measured at far from a distance of 70m using the antenna. An electric shutter on the garage which caused malfunctions was improved using the noise simulator.
Keywords
Portable antenna, Portable noise simulator, Malfunction
