Title :
2.45 GHz detector design for biomedical transponder application
Author :
Crumley, Glen C. ; Evans, Noel E.
Author_Institution :
Sch. of Electr. & Mech. Eng., Ulster Univ., Jordanstown, UK
fDate :
31 Oct-3 Nov 1996
Abstract :
This paper discusses the design of a minimum-power 2.45 GHz pulse receiver for use in a semi-active, duplex RF transponder. A 50 Ω microstrip stub-matched zero-bias diode detector forms the heart of the unit, achieving a tangential sensitivity of -56 dBm. Three-pole bandpass filtering provides rejection of out-of-band signals, typically 28 dB in the 900 MHz cellular band. The prototype receiver consumes 20 μA from a 3 V Lithium coincell and occupies 6 cm2 of surface mount board space
Keywords :
biomedical electronics; biomedical telemetry; patient monitoring; radio receivers; transponders; 2.45 GHz; 2.45 GHz detector design; 20 muA; 3 V; 50 ohm; 900 MHz; Li; biomedical transponder; lithium coincell; microstrip stub-matched zero-bias diode detector; minimum-power 2.45 GHz pulse receiver; out-of-band signals rejection; prototype receiver; semiactive duplex RF transponder; tangential sensitivity; three-pole bandpass filtering; Band pass filters; Base stations; Batteries; Circuits; Detectors; Filtering; Hospitals; Patient monitoring; Pulse amplifiers; Transponders;
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.1996.656951
