| 摘要 |
PURPOSE:To increase an attenuation quantity in a rejection band, and also to decrease an insertion loss in a passing band, by executing the matching by a higher frequency than a resonator of a dielectric resonator. CONSTITUTION:A part 11H of an H face being close to a dielectric resonator 12, in a waveguide 11 is projected toward the outside of the waveguide by length b' and length b'' in its upper side and its lower side, respectively, and inductance L by operation of magnetic energy in the projecting part is inserted in series to a parallel resonance circuit of capacity CD and inductance LD corresponding to the dielectric resonator 12. Also, an E wave having an electric field in the advancing component of a wave is generated on faces 11A-11D being discontinuous point of this projecting part, and electrostatic capacity C is formed. |
