| 摘要 |
<P>PROBLEM TO BE SOLVED: To downsize a laminated band-pass filter while preventing reduction in Q of resonators. <P>SOLUTION: A band-pass filter 1 comprises: a stack including a plurality of dielectric layers; an input terminal 2 and an output terminal 3 disposed on the bottom surface of the stack; and resonators 4, 5, and 6 provided in the stack. In constituting a circuit, the resonator 5 is located between the resonators 4 and 6. The resonator 4 includes an inductor 11 and a capacitor 14, the resonator 5 includes an inductor 12 and a capacitor 15, and the resonator 6 includes an inductor 13 and a capacitor 16. The inductor 12 is disposed in a different position in the stacking direction of the plurality of dielectric layers with respect to the inductors 11 and 13. A conductor layer is not present between the inductors 12 and 11 and between the inductors 12 and 13. The inductor 12 has a lower inductance than the inductors 11 and 13. The capacitor 15 has a larger capacitance than the capacitor 14 and 16. <P>COPYRIGHT: (C)2013,JPO&INPIT |
