Permeability of copper in the microwave frequency range

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SUMMARY

The permeability of copper in the microwave frequency range is primarily characterized by its relative DC permeability of 1. Conductors like copper exhibit dispersive properties, meaning their permeability varies with frequency. In the GHz frequency range, the permeability is expected to remain relatively stable, with minimal changes due to the skin depth effect. The Drude model has limitations when applied to diamagnetics, as highlighted by Kramers-Kronig relations, suggesting that more complex models may not yield significantly different results.

PREREQUISITES
  • Understanding of electromagnetic theory
  • Familiarity with the Drude model and its limitations
  • Knowledge of Kramers-Kronig relations
  • Basic concepts of skin depth in conductors
NEXT STEPS
  • Research the Lorentz model for electromagnetic properties
  • Explore advanced models of permeability in conductors at high frequencies
  • Study the implications of skin depth on signal attenuation
  • Investigate experimental methods for measuring permeability in the GHz range
USEFUL FOR

Electrical engineers, physicists, and researchers focused on high-frequency electromagnetic properties of materials, particularly those working with copper and its applications in microwave technology.

AlexVI
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Relative DC permeability of copper is 1. Conductors are considered dispersive and therefore the permeability should change with frequency. Where can I find data or how can I calculate permeability of copper in Ghz frequency range?
 
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This looks to be an interesting read that covers some simple classical models.

http://emlab.utep.edu/ee5390em21/Lecture%202%20--%20Lorentz%20and%20Drude%20models.pdf
 
When I was doing google search before the post I saw this one too. It was a long time ago when I studied electrodynamics but if I remember correctly there is a problem with using Drude model for diamagnetics because of Kramers - Kroning relations.
 
Well, okay. My take on this is in the GHz range not much is going on in the permeability of copper just based on the general physics outlined in the linked pdf. I don't expect the field to extend into the copper much more than a skin depth. Do you expect answers from a more detailed model will be significant and if so, how so?
 

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