Patent ID: 9460885
Filing Date: 2016-10-04
CPC Classification: H01J,H05B

Claim Text:
1. A low-pass filter arrangement for reducing stray emissions from a magnetron that is encased, along with an associated isolation transformer electrically connected to terminals of the magnetron, by an electrically conducting screen, the arrangement comprising: a low pass filter having an output connection; and an interface between the low pass filter and the electrically conducting screen, wherein the output connection of the low pass filter passes directly through the interface for electrical connection, directly or indirectly, with the isolation transformer, and the low pass filter is attached to an exterior face of a wall of the electrically conducting screen; the low pass filter further comprising a printed circuit board having first and second faces; wherein the interface comprises a ground plane arranged on the first face, at least one capacitor plate is arranged on the second face opposed to the ground plane on the first face, and the output connection of the low pass filter is connected directly or indirectly to the at least one capacitor plate.