Electromagnetic shielding (S-parameters) and electromagnetic parameters measurement system for the frequency domain up to the 50 GHz range

随着移动和智能设备的需求和利用不断扩大，消费电子和电信行业继续增长。同时，社会对射频辐射屏蔽电磁干扰的需求也越来越大。为了保护我们、我们的环境和我们的工作场所免受来自电信设备和计算机的辐射，需要屏蔽电磁干扰。导电性聚合物复合材料由于其重量轻、耐腐蚀、柔韧性和加工优势，是该应用中最有前途的材料之一。为了制造具有定制性能的导电聚合物复合材料，在超高频范围（无线电频率）内精确测量材料的EMI屏蔽效能和电磁参数（介电常数、磁导率和损耗切线）至关重要，而且极具挑战性。

The consumer electronic and telecommunication sectors continue to grow as the demand and utilization of mobile and smart devices continue to expand. At the same time, there is an increasing urge and demand on electromagnetic interference (EMI) shielding of radio frequency radiation for our society. EMI shielding is required to protect us, our environment, and our workspace from radiation coming from telecommunication equipment and computers. Electrically-conductive polymer composites are one of the most promising materials for this application due to their light weight, resistance to corrosion, flexibility, and processing advantages. To fabricate electrically-conductive polymer composites with tailored properties, precise measurement of EMI shielding effectiveness and electromagnetic parameters (permittivity, permeability, and loss tangent) of materials over ultra-high frequency ranges (radio frequencies) is crucial and highly challenging.