A comparison of various patch sizes and feed point positions of graphene microstrip antenna for orthopedic implants

An antenna is used in many wireless communication devices, such as mobile phone and radar, as well as in medical devices, such as sensor or transmitter. In the present study, the antenna was designed as a microstrip with graphene as a patch and titanium dioxide as a dielectric substrate. Graphene was used as patch material because of its suitable mechanical, electrical and bio-compatible properties. Thus, it is replaced the metallic patch-material in our simulation. Titanium dioxide was used as dielectric substrate because it has light-weight, corrosion resistance and shape memory. The simulation results report an early test of antenna size variation and various positions of feed point. The result from size variation showed that the length adjustment was more effective than the width one, moreover, it is better than a theoretical size obtained from a mathematical model. Each position of feed point gave a unique reflection coefficient of input and output electromagnetic signals.