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:
Aug. 09, 2016
Filed:
Jul. 23, 2012
Christopher Robert Lawrence, Malvern, GB;
Matthew J. Lockyear, Malvern, GB;
Peter Allen Hobson, Malvern, GB;
Alastair Paul Hibbins, Malvern, GB;
John Roy Sambles, Malvern, GB;
Christopher Robert Lawrence, Malvern, GB;
Matthew J. Lockyear, Malvern, GB;
Peter Allen Hobson, Malvern, GB;
Alastair Paul Hibbins, Malvern, GB;
John Roy Sambles, Malvern, GB;
QINETIQ LIMITED, , GB;
Abstract
A radiation absorber comprising multiple layers has a conducting base layer, and at least first and second further layers, each separated by a dielectric material, the first and second layers having patches thereon of highly conducting material, and defining resonant cavities in cooperation with the dielectric material, wherein the resonant cavities formed on adjacent layers differ in frequency. Characteristics of the patch, such as size or shape may vary on each layer to provide different resonant frequencies, and/or dielectric or magnetic properties of the dielectric material, and/or separation distance of the patches may be varied. In some embodiments, complex dielectrics may have their loss factors adapted to tune a resonant frequency, or to adapt its resonant bandwidth.