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

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

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46 Citations (Scopus)

Abstract

This paper presents a simple method to measure the relative permittivity of glass-epoxy printed circuit boards (PCBs). In this method, relative permittivity as a function of frequency is measured using an actual PCB. In order to estimate relative permittivity, the reflection coefficient is measured with a network analyzer. Relative permittivity is calculated by observing the frequencies of the resonant cavity modes. We show that the relative permittivity of a FR-4 sample decreases from 4.3 to 4.2 at frequencies from 300 MHz to 2 GHz.

Original languageEnglish
Pages (from-to)515-519
Number of pages5
JournalIEEE Transactions on Electromagnetic Compatibility
Volume43
Issue number4
DOIs
Publication statusPublished - Nov 2001

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Keywords

  • Frequency characteristic
  • Mode identification
  • Permittivity measurement
  • Printed circuit board
  • Rectangular cavity resonator
  • Reflection coefficient

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

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