Publication

Upper Bound on Power Transfer Efficiency for Shallow Implants

2026

Abstract

This paper derives a theoretical upper bound on power transfer efficiency between shallow biomedical implants and an external device. We formulate electromagnetic optimization problems to quantify the maximum attainable radiation efficiency of an implanted antenna and the maximum power transfer efficiency of an external antenna and a shallowly implanted antenna in a lossy tissue. Numerical examples of representative shallow implant geometries validate the bounds and illustrate practical design implications. The results provide guidance for antenna designers seeking to minimize device power consumption while maintaining reliable wireless links for medical sensing and monitoring.

Official source

https://infoscience.epfl.ch/entities/publication/e69e4642-9d2c-42e1-a590-bfa6b8b50479

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/e69e4642-9d2c-42e1-a590-bfa6b8b50479

About this result

Related concepts (32)

Maximum power transfer theorem

In electrical engineering, the maximum power transfer theorem states that, to obtain maximum external power from a power source with internal resistance, the resistance of the load must equal the resistance of the source as viewed from its output terminals. Moritz von Jacobi published the maximum power (transfer) theorem around 1840; it is also referred to as "Jacobi's law". The theorem results in maximum power transfer from the power source to the load, and not maximum efficiency of useful power out of total power consumed.

Antenna (radio)

In radio engineering, an antenna (American English) or aerial (British English) is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver. In transmission, a radio transmitter supplies an electric current to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic waves (radio waves). In reception, an antenna intercepts some of the power of a radio wave in order to produce an electric current at its terminals, that is applied to a receiver to be amplified.

Wireless power transfer

Wireless power transfer (WPT), wireless power transmission, wireless energy transmission (WET), or electromagnetic power transfer is the transmission of electrical energy without wires as a physical link. In a wireless power transmission system, an electrically powered transmitter device generates a time-varying electromagnetic field that transmits power across space to a receiver device; the receiver device extracts power from the field and supplies it to an electrical load.

Related publications (32)

Upper Bound on Power Transfer Efficiency for Shallow Implants

Chat with Graph Search

Group-and-cut approach for dynamic programming with Fréchet-distributed quantizers

Defect Passivation via Plasma Modification of Lead Halide Perovskite Thin Films

Operando diagnosis, optimization and degradation of solid oxide fuel cell technology