Band pass filter with resonator having spiral electrodes formed of coil electrodes on plurality of dielectric layers

摘要

Coil electrodes having a U-shape and shield electrodes having a plane shape are formed on plural dielectric layers. The coil electrodes are connected via through holes which are formed through the dielectric layers, and a spiral electrode is formed. An earth terminal and an input/output terminal are drawn out from the coil electrode to the end portion of the dielectric layer. The shield electrodes are formed on both of the coil electrodes. The dielectric layers are laminated, and the shield electrode and the earth terminal are connected by an external electrode. An external electrode connected to the input/output terminal is formed. A band-pass filter is made by forming plural spiral electrodes and magnetically coupling the spiral electrodes.