| 摘要 |
PROBLEM TO BE SOLVED: To easily and highly precisely manufacture a band pass filter with less dispersion by providing a layer constituted of a material whose dielectric rate is lower than that of an open end face-side for the shorting end face side of a dielectric block which has an inner conductor and is provided with a through hole. SOLUTION: A high dielectric part 10a is formed by the dielectric material of the high dielectric constant and a low dielectric constant part 10b is formed by time dielectric material having the low dielectric constant and the dielectric block 10 is constituted. Thus, inductance increases and the characteristic impedance of a resonator changes. Thus, a higher harmonic band can be shifted from an odd-fold basic frequency band with simple constitution. Then, the filter can be miniaturized and a simple form can be obtained. Thus, it can be formed with high dimension precision. Then, the dielectric block can be manufactured only by putting the resonator dielectric unit in a shaping mold and filling the resin material of the low dielectric constant, and manufacture dispersion can be suppressed to be small. |
