A Compact Co-planar Waveguide fed Circularly Polarized In-body Antenna for Medical Devices

摘要

In this paper a simple CPW (co-planar waveguide) fed circularly polarized (CP) antenna is proposed in ISM band (2.4-2.48 GHz) for implantable applications. The footprint of the proposed antenna is $10 imes 10 imes 0.3$ mm $^{3}$. To achieve desire CP operation, two T-shaped slots are inserted into the ground plane. The simulated 10 dB impedance bandwidth (IMBW) is around 26.5%, and 3 dB Axial Ratio bandwidth (ARBW) is around 5.26%.The radiation and specific absorption rate (SAR) performance of the antenna is also evaluated.