Title :
Wireless humidity monitoring in hermetic biomedical micropackages
Author :
S. Hauvespre;M. Dokmeci;K. Najafi
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
A miniature moisture sensing system is developed for wireless humidity monitoring of implantable micropackages. This 1/spl times/1.5/spl times/6.5 mm/sup 3/ system consists of a capacitive humidity sensor and a hybrid coil, enabling one to monitor humidity inside a small package using telemetry, using a single-turn antenna from a distance of up to 1.5 cm from the sensor. The resonance frequency of the coil and capacitor circuit shifts 8 kHz per %change in relative humidity (RH) within a 5% RH resolution.
Keywords :
"Humidity","Biomedical monitoring","Wireless sensor networks","Capacitive sensors","Sensor systems","Coils","Moisture","Biosensors","Packaging","Telemetry"
Conference_Titel :
[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint
Print_ISBN :
0-7803-5674-8
DOI :
10.1109/IEMBS.1999.804002
