Title :
An vector automatic matching system designed for wireless medical telemetry
Author :
Po, F.C.W. ; De Foucauld, Emeric ; Delavaud, C. ; Ciais, P. ; Kerherve, Eric
Author_Institution :
CEA-LETI, Grenoble
Abstract :
A novel adaptive antenna impedance matching system based on vector detection method for medical telemetry is proposed. The system controls a pi matching network tunable components by detecting the antenna complex impedance. The antenna complex impedance is extracted in order to set the proper state configuration of the tunable matching network with basic calculation. Only 10 mus tuning time is required and 30 dB improvement of return loss is obtained. The emitterpsilas power and the receiverpsilas sensitivity can be optimized whatever the perturbations on the wireless link. The whole system has been simulated on a 2.4 GHz ISM emitter.
Keywords :
adaptive antenna arrays; biomedical telemetry; impedance matching; radiotelemetry; ISM emitter; adaptive antenna impedance matching system; antenna complex impedance; frequency 2.4 GHz; tunable matching network; vector automatic matching system; vector detection method; wireless medical telemetry; Antenna accessories; Biological system modeling; Circuit simulation; Humans; Impedance; Muscles; Pacemakers; Telemetry; Tunable circuits and devices; Wireless sensor networks;
Conference_Titel :
Circuits and Systems and TAISA Conference, 2008. NEWCAS-TAISA 2008. 2008 Joint 6th International IEEE Northeast Workshop on
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4244-2331-6
Electronic_ISBN :
978-1-4244-2332-3
DOI :
10.1109/NEWCAS.2008.4606328
