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In this paper, a miniaturized implantable antenna with the dimensions of 8×8×1 mm³ has been studied for continuous monitoring of Blood Glucose Levels (BGL). The antenna performance is analyzed numerically for both the free space and implanted operation. The results show that the works excellently in both the scenarios. The antenna has the lowest resonant frequency of 3.58 GHz in free space with a gain 1.18 GHz while it operates at 2.58 GHz with a gain of 4.18 dBi. Good performance, small size and resilience to the human body effects make the antenna to have a good potential use in future implantable glucose monitoring devices. [ABSTRACT FROM AUTHOR]

A comprehensive SAR study of low and high directivity antennas operated at distances greater than 25 mm but less than 200 mm from a large homogeneous elliptical phantom is presented. The study considers antennas, such as dipoles, monopoles, planar inverted-F antennas (PIFAs), IFAs, patches, patch arrays, and dipole arrays. SAR estimation methods for low directivity antennas for both near and far field conditions are proposed and elucidated. For directive antennas and arrays radiating directly towards the phantom interesting phenomena are observed that require more detailed investigation. [ABSTRACT FROM AUTHOR]