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:
Jul. 10, 2012
Filed:
Apr. 13, 2011
Melanie Will Cole, Churchville, MD (US);
Melanie Will Cole, Churchville, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A compositionally stratified multi-layer BaSrTiO(BST) heterostructure material is described which includes a lower layer of crystallized BaSrTiOperovskite oxide where x is in the range of 0.36-0.44, inclusive, deposited on a substrate; an intermediate layer of crystallized BaSrTiOperovskite oxide where x is in the range of 0.23-0.27, inclusive, in contact with the lower layer; and an upper layer of crystallized BaSrTiOperovskite oxide where x in the range of 0.08-0.13, inclusive, in contact with the intermediate layer. A phase shifter and/or preselector tunable device including a compositionally stratified multi-layer BST hererostructure material is described according to the present invention. Temperature sensitivity of an inventive phase shifter is reduced by at least 70% in the temperature interval of 20 to 90° C., inclusive, and by at least 14% in the temperature interval of −10 to 20° C., inclusive, compared to a compositionally homogeneous 60/40 BST material.