The present study introduces a small and efficient antenna designed specifically for medical implants. With the increasing demand for wireless and minimally invasive medical devices, there is a need for antennas that can reliably transmit and receive data within the human body. The antenna presented in this study functions within the Industrial, Scientific, and Medical (ISM) frequency band, meeting all necessary regulations with a size of 10×10×1.6 mm$^3$. FEM-based HFSS software has been used for simulation and using Roger 3010 substrate with relative permittivity of 10.2. We carefully selected materials and used optimization techniques to create a compact design without sacrificing perfo... More >