Students are tasked to design and build a low-cost system capable of measuring the permittivity (dielectric constant) and loss tangent of radio frequency materials across the 1-40GHz range. Students will investigate a range of different approaches, with an eye towards cost, spectral bandwidth, and ease of measurement. They will downselect to a preferred approach and then build the system. They will be expected to develop calibration techniques and data acquisition techniques, as well as processes for extracting the desired data from the measured quantities. The final deliverable should be a prototype measurement system and the appropriate data processing techniques to extract the desired physical parameters from measurements conducted with the prototype.