Comparison of Measured and Predicted Permittivity Values for 3D Printed PLA Substrates

Autor: Jeevan Persad, Sean Rocke
Rok vydání: 2021
Předmět:
Zdroj: 2020 IEEE MTT-S Latin America Microwave Conference (LAMC 2020).
DOI: 10.1109/lamc50424.2021.9602057
Popis: The resultant relative permittivity of 3D printed polylactide (PLA) substrates with varying percentage volumes of PLA are measured using a two microstrip line method. The resultant relative permittivity of the PLA substrates is also predicted using five existing heterogenous mixture models. The measured and predicted values of relative permittivity are compared to identify the degree of fit of the mixture models to the measured values. The measured relative permittivity was found to increase as the percentage volume of PLA was increased. The measured values also increased with increasing signal frequency. The mixture models showed varying degrees of fit with two models, Rayleigh (RAY) and Refractive Index (RI), showing the best fit out of the five models. None of the models considered the frequency dependence of the relative permittivity. The results allow for the identification of opportunities for future work related to frequency dependent mixture models and detailed testing of 3D printed substrates.
Databáze: OpenAIRE