Complex Permittivity Measurements of Textiles and Leather in a Free Space: An Angular-Invariant Approach | Zendy

B. Kapilevich | Zendy; Boris Litvak | Zendy; Michael Anisimov | Zendy; Danny Hardon | Zendy; Yosef Pinhasi | Zendy

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Complex Permittivity Measurements of Textiles and Leather in a Free Space: An Angular-Invariant Approach

Author(s) -

B. Kapilevich,

Boris Litvak,

Michael Anisimov,

Danny Hardon,

Yosef Pinhasi

Publication year - 2012

Publication title -

international journal of microwave science and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.125

H-Index - 11

eISSN - 1687-5834

pISSN - 1687-5826

DOI - 10.1155/2012/375601

Subject(s) - permittivity , rayleigh scattering , free space , invariant (physics) , optics , scattering , electromagnetic shielding , radar , millimeter , physics , dielectric , acoustics , materials science , engineering , composite material , aerospace engineering , electrical engineering , mathematical physics

The paper describes the complex permittivity measurements of textiles and leathers in a free space at 330 GHz. The destructive role of the Rayleigh scattering effect is considered and the angular-invariant limit for an incidence angle has been found out experimentally within 25–30 degrees. If incidence angle exceeds this critical parameter, the uncertainty caused by the Rayleigh scattering is drastically increased preventing accurate measurements of the real and imaginary parts of a bulky material. The phenomenon must be taken into consideration in predicting shielding effectiveness of materials covering hidden object in concealed threat detection with millimeter-wave radar systems

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