Antennas design for implantable medical devices

The purpose of this paper is to design antennas for implantable medical devices. A miniature semicircular implantable planar inverted-F antenna (PIFA) is designed and experimentally demonstrated for medical communications services (MICS) band (402-405 MHz). By embedding three arc-shaped slots in a semicircular patch, the proposed antenna can obtain effective size reduction at a fixed frequency operation. The total volume of the proposed antenna including substrate and superstrate is about 151 mm³ (9.5²×1 π/2 mm³+0.5×9.5×2×1 mm³). In addition, a compact dual-band implantable antenna consisting of a spiral radiating stripe and a U-shaped radiating stripe is proposed for MICS and industrial, scientific, and medical (ISM) (2.4-2.48 GHz) applications.