In the paper results of a research of electrophysical properties of 3D-printed composites based on polyethylene glycol terephthalate and barium ferrite at the of extremely high frequency region (34-258 GHz) are presented. Frequency dependences of composites for a ferrite concentration of 40, 50 and 60 wt .% are given. At a frequency ~ 48 GHz, the region of selective absorption due to ferromagnetic resonance has been experimentally determined. The possibility of using PETG/BaFe12O19 composites in the additive technology are assessed.
In recent years, there has been a trend in expanding additive technology, in particular in the production engineering of elements millimeter and submillimeter range. The results of research of the dielectric properties of composite materials based on acrylonitrile styrene acrylate matrix and inclusions of multi-walled carbon nanotubes at the frequency range 115-258 GHz are presented. A technique for producing a composite filament for 3D-printers based on the fused deposition method is described. The electromagnetic response and the calculation of the complex permittivity of 3Dprinted samples of composites are given. The applicability of these composites in absorbers of Sub-THz radiation is assessed.
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