Design and Development of Metamaterial based RF Resonator for Ultrawideband Sensor Applications for Patient Monitoring

This work intends to characterize the design and fabrication of a radio frequency (RF) resonator using metamaterials for ultra-wideband (UWB) sensor applications with particular attention on patient monitoring systems. The proposed design makes perfect electric conductor (PEC) for the ground plane and patch components as well as FR-4 as the substrate material-selected for its exceptional balance between cost and electrical properties. Incorporating metamaterials into the patch antenna improves performance. It aims especially to improve bandwidth, sensitivity, and compactness-qualities essential for UWB sensor operation. By means of simulations covering a frequency range from 0.5 GHz to 12 GHz, two main S-parameter curves were produced: $-\mathbf{- 3 7} \mathrm{dB}$ at 5.225 GHz and 38 dB at 5.9075 GHz, so displaying significant reflection characteristics at these sites. The antenna was $100 \%$ efficient within the given frequency range, so confirming its ability to transmit and receive signals. Strong signal transmissions define reliable communication in sensor systems; hence, the dumbbellshaped radiation pattern also suggests strong signal transmissions. Addition of complementary split ring resonators (CSRRs) to the resonator enhanced its electromagnetic properties, so improving signal efficiency and extending the frequency range. These developments make the RF resonator particularly suitable for real-time physiological monitoring comprising tracking of heart rate and breathing rhythm. Particularly in patient monitoring, the results of this work show that metamaterial-based RF resonators can help to create small, dependable UWB sensors with great promise for medical uses.