| 摘要 |
PROBLEM TO BE SOLVED: To provide aλ/2 resonance type resonator and a band-pass filter with which the manufacture tolerance is ensured, without the need for the adjustment process of the characteristics due to position deviation of cut-off laminated materials and without increasing the size. SOLUTION: In the structure of aλ/2 resonance type resonator, an opposite end 2b of a hot terminal 2a of a line conductor 2 built in a dielectric substrate 1 is open. The line conductor 2 and a round conductor 6 form a distribution capacitance. capacitance forming conductors 8, 9 are provided between both ends of the line conductor 2 and a ground conductor 7 to form capacitors for adding lumped capacitance. Two sets of the line conductors 2 and the capacitors for adding lumped capacitance as above are provided, and they are electrically coupled to configure the band-pass filter.
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