Design and Performance Measurement of an In-Body Implantable Miniaturized Slot Dipole Rectangular Patch Antenna for Biomedical Applications

An in-body implantable miniaturized slot dipole rectangular patch antenna operating in the Industrial, Scientific, and Medical (ISM) band (2.4-2.4835 GHz) for biomedical applications is presented in this paper. Primary reason behind choosing ISM band is its flexibility towards larger bandwidth with smaller size of antenna. The main specialty of this antenna is its tiny dimension & bendability which makes it practically implantable for in-body biomedical applications. Actual size of the antenna is (8.20x12.5x0.045) mm. For making it suitable for implementation, the antenna was immersed inside a human tissue model where proper electrical properties of the human tissue muscle model were maintained. All the parameter calculations and simulation results were suitable to support the Industrial, Scientific, and Medical (ISM) band in both bent and planar conditions. This antenna can be used for real time wireless monitoring of blood pressure, temperature, glucose level, and other in-body applications that functions in the ISM band. To make the designed antenna suitable for implantation, it is embedded in a silicon block which acts like a superstrate. Finally, the safety measurements were taken into account by stimulating the Specific Absorption Rate (SAR) distribution of the antenna to make it perfectly biocompatible.