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Electromagnetic wave attenuation in the superconducting waveguides at frequencies above the critical value

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Volume
405
Issue
1
Identifiers
DOI: 10.1016/j.physc.2004.01.015
Keywords
  • Waveguide
  • Superconductivity
  • Frequency
Disciplines
  • Physics

Abstract

Abstract The behavior of attenuation factor α( ν) in a wide relative frequency range 1< ν<∞ ( ν= f/ f c) at microwave energy transmission by the round superconducting waveguides is investigated. It is revealed that, despite of increasing of surface resistance with increasing ν, α( ν) sharply decreases in the range 1< ν<4 and tends to characteristic limit α min at ν→∞. Such behavior α( ν) is due to joint appearance of opposite influences of wave frequency and surface resistance of the superconducting material. The waveguide with radius r=1 m, made of high-temperature superconductor, has the highest value of efficiency (98% at ν=4).

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