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Gap-mode waveguide

  • US 8,952,678 B2
  • Filed: 11/21/2011
  • Issued: 02/10/2015
  • Est. Priority Date: 03/22/2011
  • Status: Active Grant
First Claim
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1. A conductive tubular electromagnetic waveguide comprising:

  • an interior gap, andan absorber configured in such a way that a gap mode propagates with lesser attenuation than do all other propagating modes at a frequency greater than one-and-one-half times the multimode cutoff frequency.

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