Evaluation of absorptive properties and permeability of thin sheet magneto-dielectric materials

Koledintseva, Marina Y.; Razmadze, A.; Gafarov, Aleksandr Yakubovich; De, Soumya; Drewniak, James L.

doi:10.1016/j.jmmm.2012.02.049

Cited by 11 publications

(2 citation statements)

References 6 publications

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“…Magnetic materials are widely used in many high-frequency applications, including those related to the problems of electromagnetic compatibility (EMC) and electromagnetic immunity (EMI) [1]. For many technical uses, including microwave absorbers, inductors, magnetic field sensors, patch antennas on magnetic substrates, etc., it is of importance to have high permeability over a wide microwave frequency range.…”

Section: Introductionmentioning

confidence: 99%

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Limitations on high-frequency permeability of magnetic materials

Rozanov¹,

Koledintseva

2013

2013 IEEE International Symposium on Electromagnetic Compatibility

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Engineering of magnetic composites with high microwave permeability is important for EMC/EMI and other applications. One of the challenging problems is to determine constraints on the achievable high-frequency permeability of magnetic composites. The objective of the present paper is to analyze the data available from the literature on the microwave permeability constraints and derive a generalized constraint condition. It is well known that in many practical occasions the actual magnetic frequency dispersion curves differ from the Lorentzian behavior. For these cases, an integral form of the constraint may be useful. Possible applications of the integral constraint are discussed for the cases of large damping, pronounced effect of eddy currents, and inhomogeneous materials. It is shown that the derived constraint can be successfully used in these cases for both estimating microwave performance of devices containing magnetic materials and obtaining additional data on the magnetic structure of materials.

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Section: Introductionmentioning

confidence: 99%

“…is close to unity. Equation (2) may result in permeability values significantly higher than those limited by Snoek's law (1). Therefore, (2) is considered as an ultimate constraint for the microwave permeability of magnetic materials.…”

Section: Introductionmentioning

confidence: 99%