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:
Sep. 25, 2001
Filed:
Dec. 11, 1998
Franz Pitschi, Rottach-Egern, DE;
Manfred Lang, Taufkirchen, DE;
Werner Appel, München, DE;
Hans Pinzel, Bruckmühl, DE;
Spinner GmbH Elektrotechnische Fabrik, München, DE;
Abstract
A bandpass filter, includes a series of waveguide resonators positioned along a common longitudinal axis so as to define at least a first resonator and a last resonator, whereby adjacent resonators are mechanically linked to one another by a common coupling plate of sheet metal member which is formed with coupling slots for electrically coupling the resonators, with the first and last resonators each being closed by an end plate of sheet metal. Each resonator is formed from a longitudinally welded sheet metal, and the end plates and the common coupling plate are each formed with circumferentially spaced tabs which are bent so as to extend along the adjoining waveguide, whereby the tabs are welded to the waveguide, and the joints between the end plates and the common coupling plate, on the one hand, and the adjacent waveguides, on the other hand, are soldered