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:
Apr. 17, 2001
Filed:
Jun. 22, 1995
Raymond A. Simpkin, Stevenage, GB;
John Costas Vardaxoglou, Loughborough, GB;
British Aerospace Public Limited Co., Hampshire, GB;
Abstract
A frequency selective surface includes at least one frequency selective layer (,) made up of an array of electrically conductive elements (,), at least one frequency selective layer (,) having an array of non-conductive apertures (,) therethrough overlaying the element layer (,) and a dielectric layer separating the two layers (,). The element layer (,) is complementary in plan view to the aperture layer (,). The element layer (,) and the aperture layer (,) are rotated through 90 degrees in plan with respect to each other and substantially parallel to one another and the element array and the aperture array have the same periodicity.