| 摘要 |
PURPOSE:To improve the electric characteristics and to reduce assembling and adjusting time, by changing a plurality of dielectric pillar resonators to one dielectric plate, providing grooves and eliminating the dispersion of the coupling between the resonators. CONSTITUTION:A housing of almost cuboidal shape surrounded with flat conductors is provided with a single dielectric plate 51 filling the housing. Hollow holes 52 are provided in parallel in the plate 51, the inside is covered with a metal to form an inner conductor 62 (62a, 62b) of a 1/4 wavelength resonator. One end of the inner conductor 62 is fixed on a single bottom surface 54 of the housing and the other end is opened. Grooves 53, 63 extended in parallel with the inner conductors at almost the center position of the adjacent inner conductors 62a, 62b are provided for the plates 51, 61. Through the grooves, the mutual capacitance between adjacent resonators can be reduced, the amount of coupling of the resonators can be increased and a filter having a suitable band width can be realized. |
