Patent ID: 8102222
Filing Date: 2012-01-24
Classification: H03H

Abstract:
1. A passive component comprising: a dielectric substrate made up from a stack of plural dielectric layers, wherein a first shield electrode is formed on an upper portion thereof, and a second shield electrode is formed on a lower portion thereof; and a plurality of LC resonant circuits formed in a region within the dielectric substrate, the region being sandwiched between the first shield electrode and the second shield electrode, the plurality of LC resonant circuits having different resonant frequencies; and a plurality of ground capacitors connected in parallel to the plurality of LC resonant circuits, each of the plurality of LC resonant circuits comprising a parallel resonant circuit having one coil and one capacitor, wherein the parallel resonant circuit has coil-forming electrodes constituting the one coil and capacitor-forming electrodes constituting the one capacitor, the coil-forming electrodes are formed over a plurality of dielectric layers, the capacitor-forming electrodes are formed in each of two or more of the coil-forming electrodes, and in one of the LC resonant circuits that has a resonant frequency nearest to a passband, at least a coil is formed in the region sandwiched between the first shield electrode and the second shield electrode at a position farthest from the first shield electrode and the second shield electrode than a coil of other LC resonant circuits.