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:
Jan. 28, 1992
Filed:
Oct. 29, 1987
George K Farney, Boxford, MA (US);
Other;
Abstract
A microwave tube similar in structure to a magnetron includes an output port and a separate input port. The tube includes a cathode, a reentrant anode circuit and means for producing crossed electric and magnetic fields in an interaction space between the cathode and the anode circuit. The microwave tube can be used as an injection-locked or injection-primed oscillator or as an amplifier. An input signal coupling network substantially blocks transfer of internally-generated RF energy at the operating frequency in a reverse direction through the input port toward the input signal source. The input coupling network includes an anode loop coupled between two points of equal phase and magnitude in the standing wave which exists on the anode circuit, and an input loop positioned for inductive coupling of the input signal to the anode loop. The input signal can be coupled to the input loop with a coaxial transmission line, a ridge waveguide or a twin-wire transmission line. The microwave tube can utilize conventional vane type or bar type anode circuits or can utilize mixed line anode circuits having both forward wave and backward wave sections.