A Study on Dielectric Properties of Printed Circuit Board(PCB) Materials with Variation of Frequency and Temperature using Coaxial Air Line Probe

동축선로 프로브를 이용한 프린트 배선 회로용 기판 재료의 주파수 및 온도 변화에 따른 유전특성 연구

In this paper a probe for the' measurement of dielectric properties of dielectric sheet materials is designed and implemented as a coaxial air line type. Using the broadband impedance method with this measurement probe the dielectric constant and loss tangent of the glass-epoxy and teflon are determined in the frequency range of 0.1 - l.O[GHz] with the temperature variation from $25[^{\circ}C]$ up to $65[^{\circ}C]$. A measured relative dielectric constant of the glass-epoxy is 4.42 and a loss tangents is 0.019 relatively, and the relative dielectric constants of teflon is 2.17 and a loss tangents is 0.002 relatively