Frequency Dependence of Dielectric Strength

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SUMMARY

The discussion centers on the relationship between frequency and dielectric strength, specifically for air in the High Frequency (HF) and Very High Frequency (VHF) ranges of 3MHz to 300MHz. Participants referenced the Paschen curve, which describes the breakdown voltage of gases as a function of pressure and gap distance, and its implications for frequency effects on dielectric strength. Relevant research papers were shared, highlighting frequency effects in atmospheric pressure breakdowns and specific studies on argon gas. The potential impact of standing waves on dielectric strength was also mentioned.

PREREQUISITES
  • Understanding of dielectric strength and its significance in electrical engineering.
  • Familiarity with the Paschen curve and its application to gas breakdown phenomena.
  • Knowledge of High Frequency (HF) and Very High Frequency (VHF) ranges in electromagnetic theory.
  • Basic concepts of atmospheric pressure and its effects on gas ionization.
NEXT STEPS
  • Research the Paschen curve and its implications for dielectric strength in various gases.
  • Explore the effects of frequency on dielectric breakdown in air and other gases.
  • Investigate the role of standing waves in dielectric strength and electrical breakdown phenomena.
  • Review relevant studies on atmospheric pressure breakdowns and their frequency dependencies.
USEFUL FOR

Electrical engineers, researchers in dielectric materials, and professionals involved in high-frequency circuit design will benefit from this discussion.

FlufferNuterFSU
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Does anyone know what the relation between frequency and dielectric strength is? I'm mainly concerned with the dielectric strength of air in the High Frequency and Very High Frequency Ranges (3MHz - 300MHz). Thanks.
 
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FlufferNuterFSU said:
Does anyone know what the relation between frequency and dielectric strength is? I'm mainly concerned with the dielectric strength of air in the High Frequency and Very High Frequency Ranges (3MHz - 300MHz). Thanks.

I'm not sure it helps, but I googled "paschen curve" +frequency, and got some reasonable hits. Here's an abstract for a paper that may apply:

http://resources.metapress.com/pdf-preview.axd?code=q76t632361113413&size=largest

Ooo, and this abstract mentions frequency effects in atmospheric pressure breakdowns:

http://jap.aip.org/japiau/v89/i1/p15_s1?isAuthorized=no

This is for argon gas:

http://pop.aip.org/phpaen/v10/i3/p875_s1?isAuthorized=no

.
 
Last edited by a moderator:
Standing waves could prove to be more of an issue
 

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