An implanted cavity slot antenna for medical communication systems

Small implanted devices have been investigated with great interest for wireless medical applications due to the promise of different clinical usages in order to promote patient´s independence. In these implanted device systems, an antenna plays an important role as a part of transmitting and receiving power. There are several issues to consider while designing an in-body antenna, including power consumption, size, frequency, biocompatibility, etc. In this study, we propose an implanted cavity slot antenna for short-range wireless communications. The antenna is designed to operate at 2.45 GHz, one of the ISM (Industrial, Scientific, and Medical) bands, and is investigated by using the FDTD (finite difference time domain) calculation. The size of the proposed antenna is about 1 mm times 1 mm times 9 mm so that it will be easily embedded into the human body. We have analyzed some performances of the proposed antenna and the results show that the proposed antenna can be a candidate as an implanted antenna.