Design of WMTS Band Implantable Antenna for Biotelemetric Applications

Bio-Implants are essential to restore normal functionality to the damaged or failing body parts of the patients. A wide range of strategies and methods for wireless powering are being explored. The key components for the proper and reliable powering of implants are biocompatible antennas, that are resonated at any of the different frequency bands such as the wireless medical telemetry service frequency band (WMTS, 1.395–1.4 GHz), the medical implantable communication service frequency band (MICS, 402–405 MHz) and the industrial, scientific, and medical frequency band (ISM, 433–434 MHz, 902–908 MHz, 2.4–2.48 GHz). This paper suggests the design of a WMTS (1.39 – 1.42 GHz) band implantable antenna for bio-telemetric applications such as efficient powering of the implantable device. Moreover, in this design, the size of the proposed antenna is reduced to (19x14) mm2. In order to improve the conductivity of the patch, a shorting pin is utilized. The 1.4 GHz working frequency, small size, low specific absorption rate (SAR) of the proposed antenna and validation using tissue-mimic liquid phantom ensure the suitability for wireless powering of implants and other biotelemetric applications.