To provide an improved, compact and low loss laminated resonator.
A laminated resonator 10 includes: a substrate 20 having a plurality of recessed portions formed on an upper surface; a first inductor lower electrode 32 disposed in one of the recessed portions and electrically connected to an input terminal electrode 12; first and second capacitor lower electrodes 35, 37 partly disposed in some of the recessed portions and electrically connected to a ground electrode 16; a second inductor lower electrode 38 disposed in one of the recessed portions and electrically connected to an output terminal electrode 14; a dielectric layer 24 formed on the substrate; a first upper electrode 48 formed on the dielectric layer so as to be electrically connected to the first inductor lower electrode and partly opposed to the first capacitor lower electrode; and a second upper electrode 50 formed on the dielectric layer so as to be electrically connected to the second inductor lower electrode and partly opposed to the second capacitor lower electrode.
WO/2005/088832 | FILTER CIRCUIT |
JPS6042918 | FILTER DEVICE |
JPS59158609 | NOISE FILTER |
NAKAJIMA KUNIHIKO
OGINO TSUYOSHI
KAWAKAMI TOMOMI