An Implantable Antenna Design for an Intelligent Health Monitoring System Considering the Relative Permittivity and Conductivity of the Human Body

Abstract

In this paper, an intelligent health monitoring system based on body-centric wireless communications is studied, and implantable antennas are investigated. To design antennas for an intelligent health monitoring system, the effects of the relative permittivity and conductivity of a human body equivalent liquid on an implantable antenna are investigated via electromagnetic analysis. Two types of capsule antennas, an isolated type capsule antenna, and a surface type capsule antenna, are investigated and compared. An inner-layer implantable capsule dipole antenna with the characteristics of both a large effective electrical length and a small transmission loss is proposed. The methodology of the designed capsule antenna that obtains a maximum received power at 500 MHz by changing the internal impedance is also presented.

Keywords

• Intelligent body healthcare management
• implantable antenna
• relative permittivity
• conductivity
• transmission characteristic