Man-Portable Multifrequency Microwave Inspection System

In Phase II Physical Optics Corporation (POC) seeks to advance the development of the new man-portable multifrequency microwave inspection (M3I) system successfully proven feasible in Phase I. M3I is based on the use of near-field microwave inspection with a new property reconstruction algorithm augmented by an artificial neural network to determine nonconductive, multi-layer composite properties. This novel design enables the M3I system to simultaneously inspect critical composite materials and structures, and to measure the structural defects (e.g., inclusions, voids, and disbonds), material layer thickness for manufacturing verification, and two dimensional layer-by-layer radio frequency (RF) dielectric properties in the S-X bands (2-12 GHz) safely and effectively. In Phase II, POC plans to develop and test a portable M3I prototype in the field. POC plans to refine the overall M3I system design based on the Phase I results, lessons learned, and the requirements of the initially targeted applications. The Phase I system will be optimized and improved through design, modeling and simulation, and laboratory testing to prepare a final design for prototype fabrication. Working together with our partners, we plan to demonstrate the performance of M3I on representative test coupons (government furnished equipment) in a relevant field environment. Approved for Public Release 14-MDA-7739 (18 March 14).