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. 27, 1999
Filed:
Jun. 25, 1997
Abstract
A dielectric filter exhibiting excellent filter characteristics in which the manufacturing cost is reduced by forming coupling loops for dielectric resonators generally in the same shape. First through fourth TM double-mode dielectric resonators are aligned in a row with their openings facing in the same direction. First and second metallic panels are screwed to the resonators to cover their openings. An input loop and an output loop are mounted on the first panel in such a manner that they obliquely face the intersecting areas of the respective dielectric members of the first and fourth dielectric resonators, respectively. Also attached to the first panel are generally 'V'-shaped coupling loops. Also disclosed is a dielectric duplexer constructed of a plurality of such dielectric filters.