TY - JOUR
T1 - Waveguide probe loaded with split-ring resonators for crack detection in metallic surfaces
AU - Hu, Bing
AU - Ren, Zhao
AU - Boybay, Muhammed S.
AU - Ramahi, Omar M.
PY - 2014/4
Y1 - 2014/4
N2 - We present a near-field waveguide probe with an embedded array of split-ring resonators (SRRs) that operate at 16.65 GHz. When the probe scans a metal surface, the magnetic flux generated from the currents on the metallic surface strongly affects the equivalent lumped parameters of the SRRs. This, in turn, affects the reflection coefficient of the feeding port leading to high sensitivity in detecting anomalies such as cracks in the surface. Experimental results indicated the feasibility of detecting cracks, as small as 25 μm in width, in metallic surfaces. Additionally, the probe achieves good resolution in detecting closely spaced cracks.
AB - We present a near-field waveguide probe with an embedded array of split-ring resonators (SRRs) that operate at 16.65 GHz. When the probe scans a metal surface, the magnetic flux generated from the currents on the metallic surface strongly affects the equivalent lumped parameters of the SRRs. This, in turn, affects the reflection coefficient of the feeding port leading to high sensitivity in detecting anomalies such as cracks in the surface. Experimental results indicated the feasibility of detecting cracks, as small as 25 μm in width, in metallic surfaces. Additionally, the probe achieves good resolution in detecting closely spaced cracks.
KW - Near-field microscopy
KW - near-field probes
KW - split-ring resonators (SRRs)
KW - sub-wavelength resolution
KW - wave guides
UR - http://www.scopus.com/inward/record.url?scp=84898467464&partnerID=8YFLogxK
U2 - 10.1109/TMTT.2014.2309897
DO - 10.1109/TMTT.2014.2309897
M3 - Article
AN - SCOPUS:84898467464
SN - 0018-9480
VL - 62
SP - 871
EP - 878
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
IS - 4
M1 - 6763023
ER -