Related Experiment Video
Updated: Jul 17, 2026
14:31
Bioelectric Analyses of an Osseointegrated Intelligent Implant Design System for Amputees
Published on: July 15, 2009
Optimization of an implantable volume conduction antenna
Brian L Wessel1, Paul Roche, Mingui Sun
1Department of Neurological Surgery, University of Pittsburgh, PA 15213, USA.
Summary
Researchers designed a novel antenna for wireless data communication with implantable devices, utilizing biological tissue volume conduction. Finite element analysis revealed optimal antenna angles and improved signal transduction by 35% compared to analytical methods.
Area of Science:
- Biomedical Engineering
- Electromagnetics
- Medical Devices
Background:
- Sophisticated implantable devices require reliable wireless data communication.
- Existing communication methods face challenges with biological tissue impedance.
- Antenna design for in-body communication is crucial for advanced medical implants.
Purpose of the Study:
- To design and analyze an antenna for wireless data transmission from implantable devices.
- To investigate the use of biological tissue volume conduction for antenna operation.
- To optimize antenna performance using finite element analysis.
Main Methods:
- Development of a spherical volume conduction model of the head.
- Application of closed-form equations and 2D/3D finite element analyses.
- Simulation of epoxy and volume conductor reflector effects on antenna performance.
Main Results:
- Demonstrated influence of epoxy and reflector on volume currents and far-field changes.
- 3D finite element analysis showed a 35% increase in signal transduction over 3D analytical methods.
- Identified an optimal, shallower antenna inclination angle than intuitively expected.
Conclusions:
- The designed antenna effectively utilizes biological tissue properties for wireless communication.
- Finite element analysis provides superior simulation accuracy compared to analytical methods for this application.
- Antenna element rotation is necessary to mitigate destructive interference and enhance signal transduction.
Related Concept Videos
01:12Mesh Analysis for AC Circuits
In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
01:20The Maximum Power Transfer Theorem
Consider a linear AC Thevenin equivalent circuit connected to a load impedance.
The load connected draws the current, and the circuit delivers the power to the load. The alternating current flowing through the load is determined using the rectangular form of voltages, currents, network impedance, and load impedance. The average power delivered to the load is obtained from the product of the square of current and load resistance.
The load connected draws the current, and the circuit delivers the power to the load. The alternating current flowing through the load is determined using the rectangular form of voltages, currents, network impedance, and load impedance. The average power delivered to the load is obtained from the product of the square of current and load resistance.
01:24Inductance: Solid Cylindrical Conductor
To calculate the inductance of a solid cylindrical conductor, consider a 1-meter section of a non-magnetic, current-carrying conductor with radius r. Disregarding end effects and assuming uniform current density, Ampere's law helps determine the magnetic field inside the conductor. This law states that the magnetic field intensity H is concentric and constant within the conductor.
Given the uniform current distribution, the magnetic field Hx and flux density Bx inside the conductor are...
Given the uniform current distribution, the magnetic field Hx and flux density Bx inside the conductor are...