Patent ID: 8093963

Claim:
A three-stage-resonator, laminated bandpass filter comprising: first, second, and third resonator electrodes arranged such that adjacent resonator electrodes are electromagnetically coupled and each having a first side end and a second side end opposing the first side end, an input terminal connected to the first resonator electrode, and an output terminal connected to the third resonator electrode, each of the adjacent first and second resonator electrodes having the first side end connected to a first grounded capacitor and a second grounded capacitor, respectively, and the second side end directly grounded, the third resonator electrode having said first side end directly grounded and said second side end connected to a third grounded capacitor, coupling capacitors being formed between at least two of said first, second, and third resonator electrodes, electrodes of said resonator electrodes and said coupling capacitors being formed in a laminate, and at least one coupling-capacitor electrode of the electrodes of the coupling capacitors overlapping said first, second, and third resonator electrodes via no ground electrode when viewed in a lamination direction.