RF performance of a 418-MHz radio telemeter packaged for human vaginal placement

Author

Scanlon, William G. ; Evans, Noel E. ; McCreesh, Zita M.

Author_Institution

Northern Ireland Bioeng. Centre, Ulster Univ., Jordanstown, UK

Volume

44

Issue

5

fYear

1997

fDate

5/1/1997 12:00:00 AM

Firstpage

427

Lastpage

430

Abstract

The electrical and communication performance of a 0.8-μW UHF temperature telemeter designed for human vaginal placement is discussed; a solenoidal loop antenna was used, occupying a volume of 0.1 cm³. In situ, measured power absorption was between 19-25 dB, resulting in an effective operating range of 10 m. Capacitive loading lowered the antenna´s resonant frequency by 1.4% and there was a significant polarization change in the radiated output.

Keywords

SPICE; biomedical equipment; biomedical telemetry; 0.8 muW; 10 m; 418 MHz; 418-MHz radio telemeter; RF performance; capacitive loading; communication performance; effective operating range; electrical performance; human vaginal placement; polarization change; power absorption; radiated output; resonant frequency; solenoidal loop antenna; Antenna measurements; Electromagnetic wave absorption; Humans; Loaded antennas; Packaging; Power measurement; Radio frequency; Temperature; UHF antennas; UHF measurements; Electric Conductivity; Equipment Design; Female; Humans; Monitoring, Physiologic; Posture; Prostheses and Implants; Telemetry; Thermometers; Vagina;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/10.568919

Filename

568919