Sensors 2009, 9(12), 9444-9451; doi:10.3390/s91209444
Article

Circular High-Q Resonating Isotropic Strain Sensors with Large Shift of Resonance Frequency under Stress

1 Department of Electrical and Electronics Engineering, Bilkent University, Bilkent, 06800 Ankara, Turkey 2 Nanotechnology Research Center, and Institute of Materials Science and Nanotechnology, Bilkent University, Bilkent, 06800 Ankara, Turkey 3 Department of Physics, Bilkent University, Bilkent, 06800 Ankara, Turkey 4 Department of Mechanical Engineering and School of Biomedical Engineering, Orthopaedic Bioengineering Research Laboratory, Colorado State University, Fort Collins, CO 80523, USA
* Author to whom correspondence should be addressed.
Received: 31 August 2009; in revised form: 13 October 2009 / Accepted: 3 November 2009 / Published: 25 November 2009
(This article belongs to the Special Issue Microbial Sensors and Biosensors)
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Abstract: We present circular architecture bioimplant strain sensors that facilitate a strong resonance frequency shift with mechanical deformation. The clinical application area of these sensors is for in vivo assessment of bone fractures. Using a rectangular geometry, we obtain a resonance shift of 330 MHz for a single device and 170 MHz for its triplet configuration (with three side-by-side resonators on chip) under an applied load of 3,920 N. Using the same device parameters with a circular isotropic architecture, we achieve a resonance frequency shift of 500 MHz for the single device and 260 MHz for its triplet configuration, demonstrating substantially increased sensitivity.
Keywords: RFIC; Q-factor; resonators; circular architecture; bioMEMS sensors; frequency shift; sensitivity

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MDPI and ACS Style

Melik, R.; Unal, E.; Kosku Perkgoz, N.; Puttlitz, C.; Demir, H.V. Circular High-Q Resonating Isotropic Strain Sensors with Large Shift of Resonance Frequency under Stress. Sensors 2009, 9, 9444-9451.

AMA Style

Melik R, Unal E, Kosku Perkgoz N, Puttlitz C, Demir HV. Circular High-Q Resonating Isotropic Strain Sensors with Large Shift of Resonance Frequency under Stress. Sensors. 2009; 9(12):9444-9451.

Chicago/Turabian Style

Melik, Rohat; Unal, Emre; Kosku Perkgoz, Nihan; Puttlitz, Christian; Demir, Hilmi Volkan. 2009. "Circular High-Q Resonating Isotropic Strain Sensors with Large Shift of Resonance Frequency under Stress." Sensors 9, no. 12: 9444-9451.

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