A simple method for measuring the relative permittivity of printed circuit board materials

Author

Namba, Akihiro ; Wada, Osami ; Toyota, Yoshitaka ; Fukumoto, Yukihiro ; Wang, Zhi Liang ; Koga, Ryuji ; Miyashita, Takuya ; Watanabe, Tetsushi

Author_Institution

Fac. of Eng., Okayama Univ., Japan

Volume

43

Issue

4

fYear

2001

fDate

11/1/2001 12:00:00 AM

Firstpage

515

Lastpage

519

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

Keywords

cavity resonators; electromagnetic wave refraction; network analysers; permittivity measurement; printed circuit testing; 300 MHz to 2 GHz; EMI; FR-4 sample; cavity resonator; electromagnetic interference; glass-epoxy PCB; network analyzer; printed circuit board materials; reflection coefficient; relative permittivity measurement; resonant cavity modes; Bandwidth; Cavity resonators; Dielectric materials; Dielectric measurements; Digital circuits; Frequency measurement; Permittivity measurement; Printed circuits; Resonance; Resonant frequency;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/15.974630

Filename

974630