Measured scattering parameters for the coupling of stochastic electromagnetic fields to an unshielded twisted pair cable with a matched termination for different pitch distances

The coupling of stochastic electromagnetic fields into an unshielded twisted double-wire transmission line has been measured in a reverberation chamber. One end of the line features a matched load resistance and is therefore anechoic. With this chosen configuration, the influence of the pitch distance onto the frequency-dependent coupling can be clearly exposed. The measurement results confirm an existing simulation model that is based on transmission line theory and the plane wave integral representation.<br><br>The raw data of the measurement is saved in text files.<br><br>Each subfolder is for a different measurement with a different pitch distance or for the coupling between the antennas.<br><br>The meaning of the examplary filename "alpha_0.0_s11_imag.out" is as follows:<br>- "alpha_0.0" stands for a stirrer angle of 0°<br>- "s_11" means the scattering parameter s_11 (there are also s_12, s_21 and s_22)<br>- "imag" is for the imaginary part<br>- "real" is for the real part<br><br>The content of each file is the scattering parameter, where each line stands for a different frequency.<br><br>The file "alphas.out" contains all the stirrer angles (in °).<br><br>The file "freqs.out" contains all the frequencies (in Hz).<br><br>If you encounter any problems or if you have any questions, please contact:<br><br>Mathias Magdowski<br>Chair for Electromagnetic Compatibility<br>Institute for Medical Engineering<br>Otto von Guericke University Magdeburg, Germany<br>[e-mail] or [e-mail]<br>Tel. [phone]<br><br><br>本数据集针对混响室（reverberation chamber）环境下随机电磁场（stochastic electromagnetic fields）与无屏蔽双绞双线传输线（unshielded twisted double-wire transmission line）的耦合效应开展了实测研究。该传输线的一端接有匹配负载电阻（matched load resistance），从而实现无反射（anechoic）的终端配置。通过该实验设置，可清晰揭示节距（pitch distance）对耦合效应频域特性的影响规律。实测结果验证了现有基于传输线理论与平面波积分表征的仿真模型的有效性。<br><br>本次测量的原始数据以文本文件形式存储。<br><br>每个子文件夹对应一组采用不同节距的测量实验，或用于天线间耦合特性的测试。<br><br>示例文件名"alpha_0.0_s11_imag.out"的含义说明如下：<br>- "alpha_0.0"代表搅拌器（stirrer）角度为0°；<br>- "s_11"表示散射参数（scattering parameter）S₁₁（另有S₁₂、S₂₁及S₂₂）；<br>- "imag"代表信号虚部；<br>- "real"代表信号实部。<br><br>每个文本文件的内容为散射参数，每行对应一个独立的测试频率。<br><br>文件"alphas.out"存储了所有搅拌器角度（单位：°）。<br><br>文件"freqs.out"存储了所有测试频率（单位：Hz）。<br><br>若您在使用过程中遇到任何问题或有相关疑问，请联系：<br><br>马蒂亚斯·马格多夫斯基（Mathias Magdowski）<br>电磁兼容（Electromagnetic Compatibility）研究室主任<br>医学工程研究所<br>德国马格德堡奥托·冯·居里克大学<br>邮箱：[e-mail] 或 [e-mail]<br>电话：[phone]