Development of an effective evaluation system for the immunity of electro-magnetic equipments

本研究旨在研制一种利用无阻传输线结合印刷电路板的电流探针。虽然电流探头的某些电气特性是重要的，但最重要的是由电流传感器互连和被测互连组成的传输线的电气特性。我们称这种传输线为“T型传输线”。为了构造一种能矢量检测电流强度的电流探头，需要将“T型传输线”的传输线特性阻抗设计为50 Ω。由于被测互连和电流传感器的互连用平坦互连构造，因此电力线的分布根据互连在垂直方向上的宽度而有很大不同。因此，等效介电常数随垂直方向互连线的宽度变化很大。 关于我们 可以计算T型传输线的特性阻抗。为此，我们终止的T型传输线的边缘使用的特性阻抗的测量系统，我们获得的最大值与绝对值的传输线的频率在其他对终端的电压反射系数。在真空中构造的T型传输线的特性阻抗可以通过严格求解得到，而等效介电常数可以通过计算T型传输线的特性阻抗比得到。在本研究中，我们采用T型传输线来量测特性阻抗。由此可见，这种方法不受传输线形状的影响，TEM型传输线的特性阻抗是通过实验获得的。该方法将适用于各种测量。少

The purpose of this study is to develop a current probe by the use of stoic transmission line combined PCB. While some electric features of the current probe is important, the most important thing is electric features of transmission line consist of interconnection for current sensor and interconnection under test. We call this transmission line "T-type transmission line". In order to construct a current probe that can be detected current intensity vectorially, we need to design that the characteristic impedance of the transmission line for "T-type transmission line" is 50_. Because of interconnection under test and interconnection of the current sensor are constructed with a flat interconnection, the distribution of an electric lines of force differ greatly according to the width of the interconnection in a vertical direction. Thus, equivalent dielectric constant changes greatly according to the width of the interconnection of vertical direction.In this year, we have made it appear th … More at characteristic impedance of the T-type transmission line can be calculated. For that purpose, we terminate edge of the T-type transmission line using the characteristic impedance of the measurement system and we obtain maximal value with absolute value of the voltage reflection coefficient for the frequency of transmission line in other pair terminal. The characteristic impedance for the T-type transmission line constructed in vacuum can be obtained strict solution and the equivalent dielectric constant can be obtained by calculating ratio of characteristic impedance for the T-type transmission line.In this year, various structural T-type transmission lines are manufactured and the characteristic impedance is obtained experimentally. In this study, we adopt T-type transmission line to measure the characteristic impedance. It follows from this that this way is not influenced by the shape of the transmission line and the characteristic impedance for the TEM-type transmission line is obtained experimentally. This method will be applied variety of measurement. Less