A fast and accurate automatic matching network designed for ultra low power medical applications

We present a method to automatically match a system to the load variation accurately with a very short matching time for ultra low power medical applications. A demonstrator was fabricated and an experimental set-up in the medical implant communication system (MICS) frequency band of 402-405 MHz was...

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Bibliographic Details
Main Authors: Chan, W.P.F., De Foucauld, E., Vincent, P., Hameau, F., Morche, D., Delaveaud, C., Dal Molin, R., Pons, P., Pierquin, R., Kerherve, E.
Format: Conference Proceeding
Language:English
Subjects:
Antenna measurements
Biomedical equipment
Frequency
Implants
Load management
Medical services
Microwave integrated circuits
Pacemakers
Prototypes
Varactors
Online Access:Request full text
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Description
Summary:We present a method to automatically match a system to the load variation accurately with a very short matching time for ultra low power medical applications. A demonstrator was fabricated and an experimental set-up in the medical implant communication system (MICS) frequency band of 402-405 MHz was realized including a pacemaker antenna prototype immersed on a homogeneous lossy liquid. The matching network consists of a low pass pi structure with tunable components made of varactors. Methodologies for simplifying the matching network design are introduced. The measurements show that a S11 up to -30 dB is obtained with a matching time of 900 mus.
ISSN:0271-4302
2158-1525
DOI:10.1109/ISCAS.2009.5117838