paper 150302161701

Published: 2015-07-09

Design and Optimization of Miniaturized Dual-band Implantable Antenna for MICS and ISM Bands

Symeon Nikolaou,

Symeon Nikolaou

Frederick University, Cyprus

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Salman Arain,

Salman Arain

Frederick University, Cyprus

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Muhammad Ali Babar Abbasi,

Muhammad Ali Babar Abbasi

Frederick University, Cyprus

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Photos Vryonides

Frederick University, Cyprus

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Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9，Page(s)738-741

Abstract

This work discusses the design method towards the implementation of a compact, stacked, implantable antenna for biotelemetry applications. The proposed antenna consists of three stacked layers, printed on high permittivity grounded substrate. The bottom layer of the antenna above the ground plane, contains a meandered structure with a symmetrically placed T-shaped slot. The middle layer consists of two U-shaped radiators and an M-shaped metallic segment is further added on the top layer to further enhance the radiation efficiency of the antenna. These three stacked layers, form a symmetrical closed loop structure resonating on its fundamental resonant mode, at 403 MHz, for the Medical Implant Communication Service (MICS) band. A shifted higher order mode of the same closed loop structure, along with the negative currents on ground plane enables wide band operation, at 2.45 GHz, for the industrial, scientific, and medical (ISM) band. To resolve the constraints associated with implanting an antenna in human body that usually results in detuning and impedance mismatch, the antennas most important radiating sections were thoroughly investigated. A fully parametrized solution is proposed that makes the antenna a good candidate for a device, implanted at several different areas of the human body with potentially different electrical properties with consequently different detuning effect. For further investigation, the particle swarm algorithm was implemented to optimize the antennas performance while operating inside a compact, 23 × 23 × 5 mm3 block of human skin, equivalent phantom. The simulated performance of the proposed prototype antenna, indicates that it can be used for either in-vitro or in-vivo operations.

Citation

Symeon Nikolaou, Salman Arain, Muhammad Ali Babar Abbasi, and Photos Vryonides, "Design and Optimization of Miniaturized Dual-band Implantable Antenna for MICS and ISM Bands," Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9，Page(s)738-741

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