| The first part of the thesis presents the EM shielding effectiveness (SE) measurement of new kind of waveguide panel, MaxAir, which based on metal coating technology. SE Measurement tell the SE performance of MaxAir compared to the traditional metal waveguide panel. In terms of good features such as lower price, less weight, MaxAir could replace traditional waveguide panel in some applications by its SE results. There are two SE measurement methods are performed for MaxAir panel, both of them based on reverberation chamber. Measured SE for several MaxAir panel samples in different cell dimension and coating configuration. By the Measured SE results of MaxAir and simulated or measured results of pure metal traditional waveguide panel, MaxAir may not as good as traditional one, we need to trade off all of its features to meet the requirement of specific application.;The second part presents a measurement-based evaluation method for lossy material by laptop computer Wi-Fi application. The lossy material could help to reduce the EM noise from the internal components of laptop, which could affect the Wi-Fi communication. Then, based on this practical case, evaluate lossy material performance through the improvement of Wi-Fi behavior. Compared to traditional material property measurement, laptop Wi-Fi method could give a more intuitive evaluation results to how lossy material can help to improve electric product performance. In the measurement, build the Wi-Fi communication between two laptops, monitor the Wi-Fi performance when put material under test on the memory card socket. According to the data rate in different material case, some of lossy material can improve channel quality in the same noise condition. |
