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. 08, 2008
Filed:
Dec. 22, 2003
Dominique Lo Hine Tong, Rennes, FR;
Ali Louzir, Rennes, FR;
Philippe Chambelin, Chateaugiron, FR;
Christian Person, Locmaria Plouzane, FR;
Jean-philippe Coupez, Le Relecq Kerhuon, FR;
Dominique Lo Hine Tong, Rennes, FR;
Ali Louzir, Rennes, FR;
Philippe Chambelin, Chateaugiron, FR;
Christian Person, Locmaria Plouzane, FR;
Jean-Philippe Coupez, Le Relecq Kerhuon, FR;
Thomson Licensing, Boulogne Billancourt, FR;
Abstract
The invention relates to a microwave filter comprising a coaxial structure, consisting of a tubular outer conductor and an inner bar conductor. According to the invention, the inner bar conductor extends in an axial direction inside the outer tube and, together with said tube, forms a series of concentric slots in the axial direction thereby defining successive coaxial line segments with low characteristic impedance and coaxial line segments with high characteristic impedance. The aforementioned concentric slots are produced in a synthetic foam block.