Complex Relative Permittivity Measurement of Selected 3D-Printed Materials up to 10 GHz

In this contribution, the complex relative permittivity of selected materials for additive manufacturing 3D print technology is measured. The included materials are acrylonitrile butadiene styrene (ABS), polyethylene terephthalate (PET), polylactic acid (PLA), XT co-polyester and special material with admixture of cork. The samples for measurement are made by Prusa 3D printer and the manufacturing properties like necessary precision, melting temperature and mechanic properties of each material are discussed. For broadband measurement in the frequency range from 1 to 10 GHz, the transmission/reflection method is exploited. The scattering parameters of material samples located in a N-type male coaxial adapter with air dielectric are measured by vector network analyzer and the complex relative permittivity of measured samples is extracted. The results show that the real part of the relative permittivity of materials is in the range from 2.55 to 2.95 and the imaginary one is from 0.007 to 0.08.