Title :
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
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;
Conference_Titel :
Radio and Wireless Conference, 2004 IEEE
Print_ISBN :
0-7803-8451-2
DOI :
10.1109/RAWCON.2004.1389108
