Spiral chip implantable radiator and printed loop external receptor for RF telemetry in bio-sensor systems

Author

Simons, Rainee N. ; Hall, David G. ; Miranda, Félix A.

Author_Institution

NASA Glenn Res. Center, Cleveland, OH, USA

fYear

2004

fDate

19-22 Sept. 2004

Firstpage

203

Lastpage

206

Abstract

The paper describes the operation of a patented wireless RF telemetry system, consisting of a bio-MEMS implantable sensor and an external hand held unit, operating over the frequency range of a few hundreds of MHz. A MEMS capacitive pressure sensor, integrated with a miniature inductor/antenna, together constitute the implantable sensor. Signal processing circuits collocated with a printed loop antenna together form the hand held unit, capable of inductively powering and also receiving the telemetry signals from the sensor. The paper, in addition, demonstrates a technique to enhance the quality factor and inductance of the inductor in the presence of a lower ground plane and also presents the radiation characteristics of the loop antenna.

Keywords

Q-factor; antenna radiation patterns; biosensors; capacitive sensors; inductors; loop antennas; microsensors; pressure sensors; radiotelemetry; spiral antennas; 200 to 700 MHz; bio-MEMS implantable sensor; biomedical RF telemetry; biosensor systems; capacitive pressure sensor; external hand held unit; inductively powering sensor; inductor quality factor; low ground plane; printed loop antenna; printed loop external receptor; radiation pattern measurements; signal processing circuits; spiral chip implantable radiator; spiral inductor; wireless RF telemetry; Biosensors; Capacitive sensors; Inductors; Micromechanical devices; Radio frequency; Sensor phenomena and characterization; Sensor systems; Spirals; Telemetry; Wireless sensor networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio and Wireless Conference, 2004 IEEE

Print_ISBN

0-7803-8451-2

Type

conf

DOI

10.1109/RAWCON.2004.1389108

Filename

1389108