Portable and Accurate Material Characterization for RF/microwave Sensing and Imaging

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Global investment in the development of novel sensing devices has increased dramatically due to the demand for continuous monitoring. The Internet of Things (IoT) includes sensors deployed in multiple locations and measuring many different parameters, driving the need for efficient devices to a completely different level. New sensing approaches are required to enable data collection in remote and harsh environments, as well as non-invasive and continuous monitoring of animal and human health. At the same time, these approaches must be technically and economically viable. RF/microwave sensing holds tremendous potential to meet these critical needs because of real-time operation, high sensitivity, and potential for non-invasive and wireless sensing. Leveraging technology developed for microwave imaging and innovations in sensor design, robust and low-power sensing platforms can be created. However, development of RF/microwave sensors hinges on accurate characterization of the materials under test. This is particularly challenging for non-uniform and small sample sizes that are often available, as well as samples that are difficult to transport to the lab. We aim is to establish a world-class test and measurement facility for material characterization to support development of RF/microwave sensing and imaging technology. The requested infrastructure includes a highly accurate measurement system for small samples, as well as the new generation of easy-to-use, portable, and reliable measurement devices. The requested high-precision dielectric assessment systems (DAK-TL2) from SPEAG is the only system capable of accurate analysis of small samples, handling thin layers and compensating for sample imperfections. This system is accompanied by a VNA that covers up to 20 GHz. Additionally, we request a low-cost, portable, and easy-to-use system to enable highly reliable on-site measurements. This complements the in-lab performance of the DAK-TL2, providing the ability to measure a broad range of sample types and sizes in controlled and realistic scenarios. These tools replace obsolete and damaged equipment, as well as expanding our measurement capacity significantly and removing the wait time of the trainees to perform experimental research. Leveraging this portable measurement facility, we expect to develop new high-impact collaborative projects, significantly facilitate ongoing collaborations, keep pace with the industry advancement in the field, and improve the hands-on experience of the trainees.