Abstract
In this work, a novel miniaturized circular maze shaped implantable antenna has been proposed for medical applications to be operated in medical band. The biocompatible polyamide substrate (er = 4.3 and tanδ = 0.004) with 0.05 mm thickness has been used as both substrate and superstrate. The proposed antenna is featured with very good miniaturization with the dimensions of 7 × 7 × 0.1 mm3 by employing circular maze shaped structure in radiator. The proposed antenna shows maximum gain of − 23 dBi in a skin phantom model simulation at the frequency of 2.45 GHz. A prototype of antenna has been fabricated and the measurements are conducted in a pork slab. The maximum specific absorption rate has been evaluated for health safety consideration. The obtained margins are in the safe boundary and they satisfy IEEE C95.1-1999 and C95.1-2005 safety rules. The proposed antenna shows noticeable performance improvement compared to the recently proposed antennas.
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