Patent ID: 7907034

Claim:
A laminated band-pass filter comprising: a laminated structure including a plurality of dielectric layers and a plurality of electrode layers, the plurality of electrode layers each having a capacitor electrode and/or an inductor electrode disposed thereon, the capacitor electrodes and the inductor electrodes being arranged to define an even number of LC parallel resonators including neighboring LC parallel resonators of the even number of LC parallel resonators being coupled; and an input electrode connected to an input-side LC parallel resonator of the even number of LC parallel resonators and an output electrode connected to an output-side LC parallel resonator of the even number of LC parallel resonators; wherein the inductor electrode of each of the even number of LC parallel resonators defines a loop starting from a connection between a first end of the inductor electrode and the capacitor electrode; when viewed in a direction in which the inductor electrodes are arranged, surfaces of the loops defined by the inductor electrodes of the neighboring LC parallel resonators of the even number of LC parallel resonators overlap each other at least partially; when viewed in the direction in which the inductor electrodes are arranged, the loops defined by the inductor electrodes of at least two of the coupling LC parallel resonators have opposite directions; and the capacitor electrodes of the even number of LC parallel resonators have a shape and distribution having point symmetry in plan view.