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Threshold sensitive low visibility reflecting surface

  • US 5,245,352 A
  • Filed: 09/30/1982
  • Issued: 09/14/1993
  • Est. Priority Date: 09/30/1982
  • Status: Expired due to Term
First Claim
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1. A threshold energy, microwave switchable, electromagnetic energy reflecting surface comprising:

  • a surface member having first surface portions reflective of electromagnetic energy andsecond surface portions including a sufficient number of polarization insensitive elements to render said surface member invisible for at least one predetermined frequency band of incident electromagnetic energy; and

    threshold radiation sensitive means having a predetermined threshold intensity level and connected to each said element and rendering said element electrically conducting only when microwave radiation of at least said predetermined threshold intensity level is incident upon said threshold radiation sensitive means.

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