Details

Autor(en) / Beteiligte

• Trivedi, Tanuj
• Chen, Ye
• Williamson, Ian A. D.
• Pasupathy, Praveen
• Neikirk, Dean P.

Titel

Group Velocity Estimation and Defect Localization in Magneto-Inductive Waveguides

Ist Teil von

• IEEE transactions on microwave theory and techniques, 2021-04, Vol.69 (4), p.2072-2077

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2021

Link zum Volltext

• IEEE_Xplore

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• We report on time-frequency analysis (TFA) of dispersion in a 1-D magneto-inductive waveguide (MIW). The short-time Fourier transform (STFT) and Wigner-Ville distribution (WVD) are used to localize the frequency content of the dispersed wave as a function of time and to estimate the group velocity in experiments using a 1-D MIW constructed with planar resonators. Time-domain reflectometry (TDR) measurements are performed after deliberately introducing defects along the waveguide; and the results are analyzed with TFA, demonstrating the potential for using such MIW-TDR configurations as sensors. The WVD-TFA is shown to provide precise time-frequency information, accurate defect localization, and group velocity estimation, confirming the slow wave long-range nature of dispersive MIWs. The adaptability of the MIW-TDR setup and the accuracy of the WVD for localization make the technique a suitable candidate for sensing applications using engineered dispersive media.