Ultrawide measurement bench for measuring electromagnetic properties of materials in free space in a microwave range

Specialized measurement bench is developed for measuring reflection and transmission coefficients of electromagnetic wave of material samples in free space, complex permittivity and permeability of sheet samples, angle dependences of transmissivity and temperature dependences of reflectivity of radar absorbing materials based on metal substrate at normal incidence of electromagnetic wave in the frequency range from 1 to 40 GHz. With a view to increase the efficiency of measurements, several algorithms in a digital signal processing are proposed including the method of a suppression of the Gibbs phenomenon at the bandwidth limits and technique for measurement error correction of S -parameters, which is carried out in the determination of complex permittivity and permeability of low-sized samples.

диэлектрическая и магнитная проницаемость, S-параметры, радиопоглощающие материалы, коэффициент отражения, коэффициент прохождения, эффект Гиббса, коррекция результатов измерений, complex permittivity and permeability, S-parameters, radar absorbing materials, reflection coefficient, transmission coefficient, Gibbs phenomenon, measurement error correction

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