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:
Dec. 04, 2012
Filed:
Sep. 20, 2006
Jan Hesselbarth, Dublin, IE;
Jan Hesselbarth, Dublin, IE;
Alcatel Lucent, Paris, FR;
Abstract
A re-entrant resonant cavityincludes a first metallized molded plastic component, which comprises a re-entrant stub, an end walland a cylindrical side wall. The componentis surface mount soldered to a metallized PCB substrate. A rostrumis located facing the end faceof the stubto define a capacitive gapwith it. The end faceof the stuband the rostrumare configured such that relative rotation between them changes the profile of the gapand hence the gap capacitance. By suitably locating the two parts during manufacture, a particular capacitance may be chosen to give a desired resonance frequency from a selection available depending on the relative angular position of the stuband rostrum. In another cavity, the rostrum is replaced by an etched metallization layer of a printed circuit board.