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. 18, 2006
Filed:
May. 28, 2004
Guru Subramanyam, Dayton, OH (US);
Spartak Gevorgian, Gothenburg, SE;
Guru Subramanyam, Dayton, OH (US);
Spartak Gevorgian, Gothenburg, SE;
University of Dayton, Dayton, OH (US);
Abstract
Electrically tunable electromagnetic bandgap ('TEBG') structures using a ferroelectric thin film on a semiconductor substrate, tunable devices that include such a TEBG structure, such as a monolithic microwave integrated circuit ('MMIC'), and a method producing such a TEBG structure are disclosed. The present invention provides a semiconductive substrate having an oxide layer, a first conductive layer positioned on the oxide layer, a ferroelectric layer covering the first conductive layer, and a second conductive layer positioned on a surface of the tunable ferroelectric layer. The use of the ferroelectric layer, which have a DC electric field dependent permittivity, enables a small size, tunable EBG structure.