| 摘要 |
The invention relates to a high-frequency bandpass filter, comprising several cylindrical conductor rods (3, 4) arranged in a line with predetermined spacings in a continuous space defined by an elongated housing (1) made of an electrically conductive material and closed on all sides, each conductor rod being attached and short-circuited at its first end to the housing (1) and spaced apart from the housing at its second end so that each conductor rod forms a coaxial resonator together with the housing. Said second end of each conductor rod comprises a portion (3, 4) larger in diameter as compared with the remaining portion of the conductor rod, and the type of a coupling between two adjacent coaxial resonators is arranged to be set to be predominantly capacitive or predominantly inductive by adjusting the ratio of a distance between the first ends of the conductor rods (3, 4) of the coaxial resonators to a distance between said portions (4) with a larger diameter. |
