Publication

Implantable Dual-Band Inductive Link

Alexandre Schmid, Catherine Dehollain
2025

Abstract

This chapter explores dual-band telemetry systems and presents a dual-band inductive link operating at 6.78 and 13.56 MHz within the industrial, scientific, and medical (ISM) frequency bands. The primary goal is to enable wireless power and data transmission for multisite biomedical implants. To minimize magnetic interference between coils and optimize the area, a single-coil transmitter configuration is adopted in the presented design. Additionally, this chapter examines the benefits of using various planar coil shapes, including square, circular, and octagonal topologies. The proposed link ensures a reliable power supply for electronic circuits while supporting downlink data communication.

Official source

https://infoscience.epfl.ch/entities/publication/7356d61b-2ea3-4aad-a2fe-74028d59174b

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Alexandre Schmid, Catherine Dehollain
2025

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/7356d61b-2ea3-4aad-a2fe-74028d59174b

About this result

Related concepts (32)

Inductor

An inductor, also called a coil, choke, or reactor, is a passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it. An inductor typically consists of an insulated wire wound into a coil. When the current flowing through the coil changes, the time-varying magnetic field induces an electromotive force (emf) (voltage) in the conductor, described by Faraday's law of induction. According to Lenz's law, the induced voltage has a polarity (direction) which opposes the change in current that created it.

Magnetic circuit

A magnetic circuit is made up of one or more closed loop paths containing a magnetic flux. The flux is usually generated by permanent magnets or electromagnets and confined to the path by magnetic cores consisting of ferromagnetic materials like iron, although there may be air gaps or other materials in the path. Magnetic circuits are employed to efficiently channel magnetic fields in many devices such as electric motors, generators, transformers, relays, lifting electromagnets, SQUIDs, galvanometers, and magnetic recording heads.

Magnetic reluctance

Magnetic reluctance, or magnetic resistance, is a concept used in the analysis of magnetic circuits. It is defined as the ratio of magnetomotive force (mmf) to magnetic flux. It represents the opposition to magnetic flux, and depends on the geometry and composition of an object. Magnetic reluctance in a magnetic circuit is analogous to electrical resistance in an electrical circuit in that resistance is a measure of the opposition to the electric current. The definition of magnetic reluctance is analogous to Ohm's law in this respect.

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