The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 2000
Filed:
Feb. 21, 1984
Dayton D Eden, Dallas, TX (US);
Lockheed Martin Corporation, Bethesda, MD (US);
Abstract
An electromagnetic wave interactive structure is provided for forming a transmitted electromagnetic wave response which is a function of the frequency of the incident wave. A phase transition material selected from the transition-metal oxides, dynamic nonlinear materials, the rare earth monochalcogenides and the organometallics is provided in geometric relationship with a fixed metallic structure. The phase transition material is then switched between a dielectric phase and a metallic phase to alter the response of the composite structure. Thus, an inductive mesh may be switched to a reflective surface (FIG. 8); an inductive band-pass changed to a reflective surface (FIG. 9); a capacitive band-stop response to an inductive band-pass response (FIG. 10); a capacitive band-stop response changed to a reflective surface (FIG. 11); a capacitive mesh response to an inductive band-pass response (FIG. 12); and a capacitive band-stop response switched to an inductive mesh response (FIG. 13). The ability to switch the response characteristics of an electromagnetic wave interactive structure provides useful applications in such devices as optical hardening systems, agile aperture devices and polarizing devices using bi-refringent structures.