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. 07, 1982
Filed:
Apr. 09, 1980
James A Aurand, Quincy, IL (US);
Broadcast Electronics, Inc., Quincy, IL (US);
Abstract
An RF tank circuit for a transmitter power amplifier stage including a half-wave length 'folded' coaxial transmission line as an anode tuning device. The tank circuit has a grounded outer conductor and an ungrounded inner conductor, the latter to be operated at a high RF potential. The outer conductor is connected electrically to a third conductor which is adjustably extensible into the ungrounded inner conductor, hence, suggesting a folded effect for the outer conductor and the third conductor in combination. The third conductor has a bellows which can be expanded or contracted by drive means disposed exteriorly of the cavity, thereby to fine-tune the cavity to a selected frequency. The third conductor has mounting means which permit its extension into the inner conductor to be variable, thus allowing for coarse adjustment of the bandwidth, prior to the fine-tuning accomplished by suitable bellows-drive controls.