Metamaterial-based wireless strain sensors

Date
2009-07-07
Advisor
Instructor
Source Title
Applied Physics Letters
Print ISSN
0003-6951
Electronic ISSN
Publisher
American Institute of Physics
Volume
95
Issue
1
Pages
011106-1 - 011106-3
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract

We proposed and demonstrated metamaterial-based strain sensors that are highly sensitive to mechanical deformation. Their resonance frequency shift is correlated with the surface strain of our test material and the strain data are reported telemetrically. These metamaterial sensors are better than traditional radio-frequency (rf) structures in sensing for providing resonances with high quality factors and large transmission dips. Using split ring resonators (SRRs), we achieve lower resonance frequencies per unit area compared to other rf structures, allowing for bioimplant sensing in soft tissue (e.g., fracture healing). In 5×5 SRR architecture, our wireless sensors yield high sensitivity (109 kHz/kgf, or 5.148 kHz/microstrain) with low nonlinearity error (<200 microstrain).

Course
Other identifiers
Book Title
Keywords
Fracture healing, High quality factors, High sensitivity, Highly sensitive, Mechanical deformation, Micro-strain, Non-linearity errors, Per unit, Radio frequencies, Resonance frequencies, Resonance frequency shift, RF structure, Soft tissue, Split ring resonator, Strain data, Strain sensors, Surface strains, Test materials, Wireless sensor, Metamaterials, Natural frequencies, Radio broadcasting, Radio transmission, Ring gages, Sensors
Citation
Published Version (Please cite this version)