Patent ID: 9318296
Filing Date: 2016-04-19
CPC Classification: H01J

Claim Text:
1. A magnetron, comprising: a cathode having an axis; a vacuum envelope including a glass portion extending radially relative to the axis of the cathode; an anode having a cylindrical anode wall surrounding the cathode; a pair of electrically conducting support arms mounted vacuum-tight in a wall of the glass portion of the vacuum envelope and having free ends located exterior to the cylindrical anode wall; and leads connecting the free ends of the support arms to the cathode, the support arms supporting the cathode via the leads, wherein each of the support arms has a first portion having a first diameter extending over a region of mounting in the glass portion, and each of the support arms has a second portion extending from the free ends to the first portion and having a second diameter that is smaller than the first diameter thereby to increase a resonant frequency of the support arms.