A single-fed miniaturized circularly polarized implantable antenna for ISM band biomedical application

Abstract

A single-fed, miniaturized, circularly polarized implantable antenna is proposed for 2.4 GHz to 2.48 GHz Industrial, Scientific, and Medical band for biomedical applications. The miniaturization and circularly polarization are realized by using capacitive loads and mender lines on the radiator. Thus, the suggested one, which has a compact size of 12 mm×12 mm×1.27 mm and wideband circularly polarized property is obtained. The simulation impedance, axial radio, and radiation pattern are studied in a cubic skin phantom. The results show that a bandwidth of 13.7% can be realized with simulated S11 below -10 dB, and 12.7% with simulated axial radio below 3 dB.