2.4 GHz Antenna Design for Tumor Detection on Flexible Substrate for On-body Biomedical Application
Gaurav Kumar Soni, Akash Rawat, Dinesh Yadav, Ashok Kumar
Abstract
The flexible and wearable technology have been involved in the recent technology and attracted a large amount of importance in various applications viz. antenna, sensor, biomedical, and communication. It offers stretchable, bendable, and foldable features. In this paper, a flexible antenna resonating at 2.4 GHz is proposed for on-body biomedical application particularly for tumor detection. It is designed on the flexible polyimide substrate having dielectric constant <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$(\varepsilon_{r})=3.5$</tex> and loss tangent <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$(tan\ \delta)=0.001$</tex> . For the detection of tumor, the reflection coefficient ( <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\vert S_{11}\vert$</tex> ), gain, and specific absorption rate (SAR) parameters are analyzed for conventional human tissue. Further, by varying the size of tumor in human tissue, the antenna results are presented.