W-Band Free-Space Dielectric Material Property Measurement Techniques for Beamed Energy Applications

摘要

Free-space techniques in W-band (75-110 GHz) using a vector network analyzer and millimeter-wave lenses are applied at room temperature to measure the intrinsic electromagnetic properties of materials, including dielectric constants and dielectric loss factors to characterize millimeter-wave absorption and related electromagnetic interactions with the material. The measurement techniques from the dielectric property measurement experiments will be performed at a range of higher temperatures (up to 2300K) to identify materials of interest for scaled beamed energy heat exchanger measurements and to provide inputs into a coupled analytical model for a scaleable design of a millimeter-wave absorbing heat exchanger for high temperature aerospace and industrial beamed energy processes.