Circular High-Q Resonating Isotropic Strain Sensors with Large Shift of Resonance Frequency under Stress.
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.
Department of Electrical and Electronics Engineering, Bilkent University, Bilkent, 06800 Ankara, Turkey; E-Mail:  rohat@ee.bilkent.edu.tr.
Rohat
R
Melik
Emre
E
Unal
Nihan Kosku
NK
Perkgoz
Christian
C
Puttlitz
Hilmi Volkan
HV
Demir