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 language | English |
---|---|
Pages (from-to) | 515-519 |
Number of pages | 5 |
Journal | IEEE Transactions on Electromagnetic Compatibility |
Volume | 43 |
Issue number | 4 |
DOIs | |
Publication status | Published - Nov 2001 |
Keywords
- Frequency characteristic
- Mode identification
- Permittivity measurement
- Printed circuit board
- Rectangular cavity resonator
- Reflection coefficient
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering