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:
May. 23, 1995
Filed:
Nov. 22, 1993
Devon J Gray, Torrance, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A high Q microwave filter is disclosed. Coupling bar structures are included in a cylindrical resonator, extending substantially the entire length of the resonator for coupling orthogonal modes. The coupling bars have a lower profile than conventional tuning screws. The symmetry of the filter structure is improved over the prior art coupling devices which relied entirely on tuning screws for coupling E fields of one mode to the other mode. The coupling bar structure has a lower profile penetrating less into the supported E fields while obtaining the desired coupling. Increased bandwidth may be obtained at improved symmetries over the prior art devices. Fine tuning may be provided by inserting tuning screws into the cylindrical cavity. The tuning screws require less penetration as substantially most of the coupling occurs by virtue of the coupling bars.