A novel algorithm for implantable antenna design: Size and radiation performance considerations

In this paper, we propose a novel algorithm for implantable antenna design, which takes into account both miniaturization and radiation performance considerations. Initially, we assess the radiation performance of implantable antennas for medical telemetry at 403.5 MHz, as a function size. Twenty circular implantable antennas of different radii are designed based on a parametric model, and further compared in terms of the exhibited radiation efficiency and far-field gain. Results indicate significantly improved radiation performance with size increase. Therefore, a novel algorithm is proposed, which applies Quasi-Newton optimization to optimize the design of the parametric antenna model under consideration, in order to achieve the best balance between size and exhibited radiation performance.