Method of forming noise filter for a magnetron

Abstract

The present invention relates to a noise removing filter of a magnetron and a noise removing method. In the conventional art, the noise is removed by forming a low band pass filter formed of a choke coil and a through type capacitor. In this case, it is impossible to effectively remove the noises which are outputted at a band width below 100 MHz and at a band width of 500 MHz and 700-800 MHz. In order to overcome the above-described problem, a magnetron noise filter in accordance with the present invention which includes a shield box fixed to one side of the magnetron, a through type capacitor installed at one side of the shield box and a combined choke coil connected to a cathode terminal of the magnetron and a terminal of the capacitor, wherein the combined choke coil comprising a tightly wound portion around a bar having a certain diameter and a loosely wound portion connected with the tightly wound portion. Therefore, it is possible to remove noises which occur at a band width below 100 MHz and a high frequency band width above a few hundreds MHz.

Dependencies are inferred from the claim text.