Author/Authors :
T.، Watanabe, نويسنده , , A.، Namba, نويسنده , , O.، Wada, نويسنده , , Y.، Toyota, نويسنده , , Y.، Fukumoto, نويسنده , , Wang، Zhi Liang نويسنده , , R.، Koga, نويسنده , , T.، Miyashita, نويسنده ,
Abstract :
This paper presents a simple method to measure the relative permittivity of glass-epoxy printed circuit boards (PCBs). In this method, the relative permittivity as a function of frequency is measured using an actual PCB. In order to estimate the relative permittivity, the reflection coefficient is measured with a network analyzer. The relative permittivity is calculated by observing the frequencies of the resonant cavity modes. We show that the relative permittivity of an FR-4 sample decreases from 4.3 to 4.2 at frequencies from 300 MHz to 2 GHz.
