Microwave Reflectance and Transmittance Properties of Conductive Composite Materials
Energy Procedia 2017
Andrejs Šiškins, Tarmo Koppel, Viktors Mironovs, Irina Hussainova, Jānis Ločs, Heldur Haldre

This study investigates the microwave electromagnetic shielding properties of secondary use and composite materials used as ingredients in shielding materials. Materials investigated include: waste tire crumb rubber (CR), metallurgical slag (MS) and commercial lightweight expanded clay aggregate (LECA). These materials were tested in a powder form in bulk conditions. Also included were core-shell type spheres – expanded polystyrene (EPS) coated by MS (MS@EPS), diameter 4.0-5.0 mm and coating thickness 150 µm. A setup of radiofrequency generating and metering instruments were utilized to measure the reflective and transmission properties of the innovative material. The radiofrequency field used was of 2.4 GHz frequency. Reflection and transmission characteristics of the material were measured by free space method. Reflection and transmission coefficients (from 0 to 1) were calculated to each tested sample. The measurements results show full transmission properties for crumb rubber and MS@EPS. In case of LECA 91% of the radiation passed through the material while 15% of reflection was measured. The applications of prospective shielding materials innovative material include shielding smart electrical systems and smart meters from an unwanted electromagnetic interference that may affect the work of the meters themselves or the nearby electronic equipment.

Atslēgas vārdi
electromagnetic field, radiofrequency, microwaves, reflection, transmission, syntatic foam, iron oxide, fluidized bed coating

Šiškins, A., Koppel, T., Mironovs, V., Hussainova, I., Ločs, J., Haldre, H. Microwave Reflectance and Transmittance Properties of Conductive Composite Materials. No: Energy Procedia, Latvija, Riga, 12.-14. oktobris, 2016. Riga: Elsevier, 2017, 354.-361.lpp. ISSN 1876-6102. Pieejams: doi:10.1016/j.egypro.2017.04.006

Publikācijas valoda
English (en)
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