Patent ID: 6911880
Filing Date: 2005-06-28
Classification: H01P

Abstract:
1. A transmission line type noise filter connectable between an electrical load component and a power supply for attenuating an alternating current while passing a direct current, said transmission line noise filter comprising: a first electrode terminal connected to the electrical load component; a second electrode terminal connected to the power supply; a third electrode terminal connected to a fixed potential; and first, second, and third distributed constant transmission line type filter segments, each of which includes a first metal conductor comprising a plate, a second metal conductor opposed to the first metal conductor, and a dielectric layer which is made of an oxide of the first metal conductor and which is sandwiched between the first metal conductor and the second metal conductor; wherein the second filter segment and third filter segment each have a greater impedance than the first filter segment; and wherein the first, the second, and the third filter segments are cascaded such that: