| 摘要 |
PROBLEM TO BE SOLVED: To provide a small laminated band pass filter having an attenuation pole outside a passing band. SOLUTION: Electrodes 22, 23 and electrodes 26, 27 which are provided with leading-out electrodes for connecting resonator electrodes 24, 25 to electrodes of input/output sections sandwich the electrodes 24, 25 in a laminating direction between upper and lower sides via a dielectric. As the result, a parallel resonance circuit is formed on the input section and the output section of the BPF, and the attenuation pole can be provided at the outside of the passing band. Also, by changing electric lengths of these, an attenuation pole frequency can be changed. COPYRIGHT: (C)2004,JPO&NCIPI
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