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Experimentally verified Mn-Zn ferrites' intrinsic complex permittivity and permeability tracing technique using two ferrite capacitors
- Source :
- IEEE Transactions on Magnetics. March, 2007, Vol. 43 Issue 3, p974, 8 p.
- Publication Year :
- 2007
-
Abstract
- After setting up a mathematical model for rectangular-shaped Mn-Zn ferrite capacitors, this paper investigates dimensional effects on the intrinsic complex permittivity and the measured apparent complex permittivity of Mn-Zn ferrite blocks. The simple block structure of the samples guarantees their easy and precise preparation. Above a few hundred kilohertz, dimensional effects make the measured apparent complex permittivity deviate from its intrinsic value. This paper uses a Newton-Raphson based method to trace the intrinsic complex permittivity and permeability from the measured impedances of two rectangular-shaped Mn-Zn ferrite capacitors in the frequency range from a few hundred kilohertz to 40 MHz. From the traced intrinsic complex permittivity and permeability, the apparent complex permittivity of a third sample with different dimensions is then calculated theoretically. The papers also presents results of experiments carried out to measure the apparent complex permittivity of the third sample; agreement between the measured and the calculated values is very good. This justifies the validity of the method presented in this paper, when used to determine the dimension-independent intrinsic complex permittivity and permeability of Mn-Zn ferrites. Index Terms--Apparent complex permittivity, complex permeability, dimensional effects, Mn-Zn ferrite, Newton-Raphson method.
Details
- Language :
- English
- ISSN :
- 00189464
- Volume :
- 43
- Issue :
- 3
- Database :
- Gale General OneFile
- Journal :
- IEEE Transactions on Magnetics
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.160542325