| Autor: |
윤대영, 김지형, 윤나내, 오경현, 우대웅, 박용배 |
| Předmět: |
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| Zdroj: |
Journal of Korean Institute of Electromagnetic Engineering & Science / Han-Guk Jeonjapa Hakoe Nonmunji; Jun2022, Vol. 33 Issue 6, p498-508, 11p |
| Abstrakt: |
In this study, we introduce a technique to eliminate the multiple reflection effects using time gating and calculate the dielectric constant of 3D printed materials using a free-space measurement system. Air, conductor, and MUT signals in the frequency domain obtained using the VNA are acquired and converted into the time domain via the inverse Fourier transform. A window function is applied in the time domain to extract only the reflected signal in the desired area. Subsequently, S11 and S21 of the MUT are obtained through calibration, and the dielectric constant of the object is estimated using the NRW method. Consequently, the dielectric constant of PLA, which is often used in FDM printers, is calculated to be 2.788 and the loss tangent is 0.054. Similarly, the dielectric constant and loss tangent for a general resin used in an SLA printer are calculated to be 3.142 and 0.071, respectively. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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