Bistatic RCS calculation for propellers at near-resonant frequencies

Marák, Károly; Pető, Tamás; Bilicz, Sándor; Gyimóthy, Szabolcs; Pávó, József

doi:10.3233/jae-171255

Cited by 2 publications

(2 citation statements)

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“…The authors’ interest in investigating high-frequency conducting properties arose during experiments investigating the scattering from rotating carbon fiber-reinforced plastic propellers for radar-detection applications (Marák et al , 2018). In Marák et al (2019), it was shown that while for the purposes of radar applications, carbon fiber propellers can be modeled using a perfect electric conductor model, more thorough investigations revealed that the resonant frequency and the magnitude of the field scattered from elongated objects such as propellers is dependent on the conductivity of the object’s material.…”

Section: Introductionmentioning

confidence: 99%

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Experimental technique for high-frequency conductivity measurement

Marák

Bilicz

Pávó

2019

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Purpose The purpose of this study is to introduce a novel method for the measurement of electromagnetic material parameters. Design/methodology/approach The main idea behind the approach is the fact that for slabs with elongated shapes, the intensity of the backscattered field and the electromagnetic resonance frequency corresponding to the length of the sample are dependent on the conductivity of the sample’s material. Findings It is shown that for a known scattered field and resonance frequency, it is possible to formulate an inverse problem as to the calculation of the conductivity of the sample’s material at the considered frequencies. To investigate the applicability of the method, demonstrative experiments are performed during which the micro-Doppler effect is used to increase the measurement accuracy. The idea is extended to the case of anisotropic samples, with slight modifications proposed to the experimental setup in the case of significant anisotropy in the investigated material. Practical implications The measurement method may prove useful for the investigation of the high-frequency conductive properties of certain materials of interest. Originality/value To the best of the authors’ knowledge, this is the first time the use of the micro-Doppler effect is proposed for the purpose of the measurement of material parameters.

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Section: Introductionmentioning

confidence: 99%

“…Using earlier results concerning scattering from rotating objects (Marák et al , 2018, 2019; Peto et al , 2018) and numerical model created using the finite element method (FEM), we perform simulations on the scattering from elongated samples, and give an analysis on the accuracy of the method.…”

Section: Introductionmentioning

confidence: 99%