Title :
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
fDate :
31 Oct-3 Nov 1996
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;
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
DOI :
10.1109/IEMBS.1996.656952
