Miniaturized Antenna for Biomedical Implantable Devices

This work proposes the design of an antenna for energy reception or wireless communication in biomedical implant applications. Aiming at the application of miniaturization techniques to reduce the total size of the antenna. The proposed antenna is of the patch type with rectangular shape, designed to operate on the frequency of 2.4 GHz. In the initial design of the antenna, theoretical concepts were used to calculate its dimensions, and then the use of HFSS (High-frequency Structure Simulator) simulation software was used for analysis of S parameters such as gain and reflection coefficient of the antenna, and optimizations of the techniques employed. As results it was analyzed that the positioning of antenna components, such as the feed are essential to reduce return losses, and the addition and positioning of short circuit slots in patch pin can lead to a decrease in the frequency of resonance. However, more simulations and applications of other techniques such as opening slots the patch plane are still needed to provide the desired resonance frequency of 2.4 GHz, decreased return loss, and increased operating bandwidth.