Miniaturized scalp-implantable antenna for wireless biotelemetry

Abstract

In this study, we present a scalp implantable miniaturized biocompatible antenna at the medical implant communication service (MICS) band (402-405 MHz). The antenna dimension is only 26.4 mm3 (11 mm × 8 mm × 0.3 mm) which is an electrically small antenna. It provides a monopole like radiation pattern with radiation efficiency of 1.9%, -10dB impedance band-width of 42MHz and gain of -42.21 dB. These results are achieved when it is implanted in skin tissue of a human head model at 5mm depth. To reduce simulation time, initially the antenna was placed in a skin tissue simulating box of 5mm implant depth. For simulation in skin tissue box, Ansoft's EM simulator HFSS and for human head implantation, SEMCAD X FDTD software was used.