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:
Mar. 08, 2011
Filed:
Feb. 10, 2004
Spartak Gevorgian, Göteborg, SE;
Anders Derneryd, Göteborg, SE;
Spartak Gevorgian, Göteborg, SE;
Anders Derneryd, Göteborg, SE;
Telefonaktiebolaget L M Ericsson (publ), Stockholm, SE;
Abstract
The present invention relates to a tunable microwave/millimeter-wave arrangement comprising a tunable impedance surface. It comprises an Electromagnetic Bandgap Structure (EBG) (Photonic Bandgap Structure) comprising at least one tunable ferroelectric layer (), at least one first, top, metal layer () and at least one second metal layer (A,B). Said first () and second metal layers (A) are disposed on opposite sides of the/a ferroelectric layer (), and at least the first, top, metal layer () is patterned and the dielectric permittivity of the at least one ferroelectric layer () is dependent on a DC biasing voltage directly or indirectly applied to first () and/or second (A,B) metal layers disposed on different sides of the/a ferroelectric layer.