Loaded waveguide measurements of plastic explosives at V-band

Zachary J. Landicini; Jeffrey Barber; James C. Weatherall; Duane C. Karns; Peter R. Smith; Joaquin Aparicio-Bolaño; Wendy Ruiz

doi:10.1117/12.2663207

14 June 2023 Loaded waveguide measurements of plastic explosives at V-band

Zachary J. Landicini, Jeffrey Barber, James C. Weatherall, Duane C. Karns, Peter R. Smith, Joaquin Aparicio-Bolaño, Wendy Ruiz

Author Affiliations +

Proceedings Volume 12535, Radar Sensor Technology XXVII; 125350H (2023) https://doi.org/10.1117/12.2663207
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

Dielectric measurements of plastic explosives using a loaded waveguide technique via vector network analyzer and banded MMW extender modules operating at V-band (50 – 75 GHz) are performed. A portion of explosive sample is inserted into a waveguide shim 2mm in length and trimmed flush with the faces of the shim. Two-port S-parameter measurements were conducted on the explosive; the empty shim is similarly characterized. Using standard waveguide equations and the measured length of the shim, the complex S-parameter data obtained with the filled shim is optimized to four free parameters — complex permittivity and distance offsets for the two sample faces relative to the calibration planes. Permittivity data obtained from measurements of the plastic explosives C-4, Primasheet 1000, Primasheet 2000 and Semtex 10 are presented. Results obtained for C-4 are comparable to other data in open literature. Excellent agreement between the experiment and the fit is obtained using a constant permittivity across the waveguide band, indicating that dispersion is not significant for these materials.

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Citation Download Citation

Zachary J. Landicini, Jeffrey Barber, James C. Weatherall, Duane C. Karns, Peter R. Smith, Joaquin Aparicio-Bolaño, and Wendy Ruiz "Loaded waveguide measurements of plastic explosives at V-band", Proc. SPIE 12535, Radar Sensor Technology XXVII, 125350H (14 June 2023); https://doi.org/10.1117/12.2663207

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