Non-Invasive Microwave CSRR-Based Sensor for Diabetic Foot Ulcers Detection

This paper presents numerical modeling and study of a non-invasive microwave sensor for the detection of diabetic foot ulcers. The developed microwave sensor is based on the subwavelength complementary split-ring resonators (CSRRs) concept, which fits quite well to sense the changes in the electromagnetic properties of the human foot tissues when placed in near-field zone of the foot. To validate the concept, the transmission coefficient between two ports that are attached at sensor's ends is numerically computed for a diabetic foot ulcer and compared against a normal foot. This portable sensor among other non-invasive microwave sensing modalities can provide an early screening tool for diabetic foot care.