Asymmetric CPW-fed dual band antenna sensor with reduced SAR for burn depth and severity classification

In this paper, a dual band antenna sensor with an asymmetric CPW fed and metamaterial split ring structure is proposed for non-invasive Burn depth and severity classification. The antenna Sensor is termed as Asymmetric CPW-fed Dual band (ACD) antenna sensor. In Traditional noninvasive burn severity analysis methods use RGB images for classification of burn depth prediction and severity classification. RGB images-based classification provides less accuracy due to Skin tone and color variation. To solve the above problem, ACD antenna sensor is proposed and tested the performance in skin phantom for different burn depth and severity is classified. The ACD Antenna has split in vertical arm of the loop, with asymmetric CPW-fed using a metal stub for optimal radiation. In ACD Antenna, split ring structure expands the antenna impedance bandwidth and radiates the lower resonance at 2.4 GHz due to metamaterial property and split is located at loop. The ACD antenna is of size of 20 \(\times \) 20 \(\times \) 1.6 mm 3 , built with a low-cost FR-4 substrate possessing \(\upvarepsilon \_\text{r}\) =4.4 and \(\text{t}\text{a}\text{n}\updelta \) =0.02. The split ring has computed for the specific absorption rate (SAR) reduction on a human tissue of 1g and 10g respectively. ACD antenna has fractional bandwidth of 29.48% (1.87 \(-\) 2.56 GHz) at 2.34 GHz and 42.5% (3.67 \(-\) 6.09 GHz) at dual resonance of 3.78 GHz and 5.69 GHz. The Prediction accuracy is about 93% for burn stage classification, when compared to traditional methods.