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. 02, 2013
Filed:
Jul. 16, 2010
Yehoshua Dan Agassi, Silver Spring, MD (US);
Daniel E. Oates, Belmont, MA (US);
Yehoshua Dan Agassi, Silver Spring, MD (US);
Daniel E. Oates, Belmont, MA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
Intermodulation distortion (IMD) is known to be an impediment to progress in superconductor-based filter technology. The present invention's methodology for reducing IMD can open doors to heretofore unseen practical applications involving high temperature superconductor (HTS) filters. Typical inventive practice includes (a) increasing the thickness d, and/or (b) changing the operation temperature T, of the filter's HTS film. The film's thickness d is increased in such a way as to decrease the IMD power Pin accordance with the material-independent proportionate relationship∝1/.The film's operation temperature T is bettered or optimized in accordance with the material-independent proportionate relationship∝(λ())(())/(Δ()),and further in accordance with three individual material-dependent relationships, namely, between operation temperature T and each of linear penetration depth λ, gap maximum Δ, and kernel K. Some inventive embodiments include oxygen overdoping of the film as an additional/alternative IMD-reductive measure.