Soot particle properties in the microwave range

This paper outlines the study of Diesel soot particle properties in the frequency band 2.0-40.0 GHz. Using a transmission/reflection as well as a cavity perturbation method, the complex dielectric constant ε* = ε1 - jε 2 was measured for multiple of samples (soot particles produced in a Diesel engin...

Full description

Saved in:
Bibliographic Details
Published in1993 23rd European Microwave Conference pp. 959 - 960
Main Authors Michel, R.P., Baican, R, Schubert, E.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.1993
Subjects
Cavity perturbation methods
Conductivity
Dielectric constant
Dielectric measurements
Diesel engines
Electromagnetic wave absorption
Frequency
Hafnium
Particle measurements
Reflection
Online AccessGet full text

Cover

More Information
Summary:This paper outlines the study of Diesel soot particle properties in the frequency band 2.0-40.0 GHz. Using a transmission/reflection as well as a cavity perturbation method, the complex dielectric constant ε* = ε1 - jε 2 was measured for multiple of samples (soot particles produced in a Diesel engine and deposited on paper filter). From the analysis of the experimental data the following conclusions appear: The complex dielectric constant - i.e. the HF electrical conductivity and the microwave power absorption efficiency - are dependent on the frequency and the soot particle thickness. Increasing the soot particle thickness causes the reflection to be stronger and results in less influence on deeper particle layers from incident microwave energy. The HF electrical conductivity has a maximum value between 5 and 10 GHz. The maximum power absorption efficiency appears in the same frequency band and decreases with increasing soot particle thickness.
DOI:10.1109/EUMA.1993.336781