Patent ID: 7800465

Claim:
A passive component comprising a filter according to an unbalanced input/unbalanced output system, having at least one resonator and an unbalanced to balanced converter, wherein a plurality of electrodes make up said filter; a plurality of striplines make up said unbalanced to balanced converter; a first capacitor electrode provides a capacitive coupling between an electrode of an output of said filter and a stripline of an input of said unbalanced to balanced converter; a second capacitor electrode provides a capacitive coupling between an electrode of an input of said filter and the stripline of the input of said unbalanced to balanced converter; said plurality of electrodes, said plurality of striplines, said first capacitor electrode and said second capacitor electrode are disposed in a dielectric substrate made up of a plurality of stacked dielectric layers; the electrode of the input of said filter comprises an input resonator electrode of an input resonator; the electrode of the output of said filter comprises an output resonator electrode of an output resonator; said first capacitor electrode faces toward said output resonator electrode with one of the plurality of stacked dielectric layers interposed therebetween; said second capacitor electrode faces toward said input resonator electrode with another of the plurality of stacked dielectric layers interposed therebetween; said first capacitor electrode and said second capacitor electrode are disposed on different respective dielectric layers of the plurality of stacked dielectric layers; and said first capacitor electrode and said second capacitor electrode are electrically connected to each other through a via hole.