MAGNETRON POWER SUPPLY FILTER

摘要

A filter (20) for reducing a ripple voltage component of a magnetron power supply comprises a first filter element comprising a first inductor (L1) in series with a power supply circuit for the magnetron (13) and a first capacitor (C1) in parallel with the magnetron; and a second filter element (21) which is resonant substantially at a frequency of the ripple voltage component, the second filter element comprising a second inductor (L2) in series with the first inductor (L1) and a second capacitor (C2) bridging the second inductor (L2).