Antenna-body interaction effects in a 418 MHz radio telemeter for infant use

Author

Scanlon, William G. ; Evans, Noel E. ; Rollins, Mark

Author_Institution

Sch. of Electr. & Mech. Eng., Ulster Univ., Jordanstown, UK

Volume

1

fYear

1996

fDate

31 Oct-3 Nov 1996

Firstpage

278

Abstract

The RF loading effects on a chest-worn heart-rate telemetry transmitter were measured; a 6 cm² printed loop in a 418 MHz tank circuit was used as the radiator, 1-16 year-old children were used as test subjects. An individual power absorption of 3.4 dB was found, based on the numerical integration of polar patterns. Body capacitance caused tank detuning of between 0.1 and 5.2 MHz, depending on the physical orientation of the loop

Keywords

biomedical telemetry; capacitance; cardiology; mobile radio; patient monitoring; radio links; radio transmitters; transmitting antennas; 0.1 to 5.2 MHz; 1 to 16 y; 3.4 dB; 418 MHz; 418 MHz radio telemeter; antenna-body interaction effects; body capacitance; chest-worn heart-rate telemetry transmitter; children; individual power absorption; infant use; loop physical orientation; numerical integration; physiological monitoring; polar patterns; printed loop; tank circuit; Antenna measurements; Antenna radiation patterns; Circuit testing; Enterprise resource planning; Frequency; Oscillators; Pediatrics; Polarization; Radio transmitters; Telemetry;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE

Conference_Location

Amsterdam

Print_ISBN

0-7803-3811-1

Type

conf

DOI

10.1109/IEMBS.1996.656952

Filename

656952