Low-pass filter
AssigneeMurata Manufacturing Co., Ltd.
InventorsKikuo Tsunoda, Masamichi Ando, Yasunori Takei
Life of this patent
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Abstract
A plurality of cylindrical inner conductor portions having different diameters are connected with each other to form an inner conductor. The inner conductor portions include high-impedance portions and low-impedance portions. The inner conductor is formed within an outer conductor with a nonuniform inner diameter. The inner conductor is formed so that the axial length of some of the inner conductor portions forming the high-impedance portions is smaller than the axial length of the other inner conductor portions forming the high-impedance portions, and the diameter of the inner conductor portions forming the high-impedance portions is greater than a predetermined minimum diameter
Claims14
A low-pass filter comprising:
- an outer conductor having a predetermined shape in a cross section perpendicular to a signal propagation direction;
- an inner conductor formed within the outer conductor, the inner conductor including a plurality of low-impedance portions and a plurality of high-impedance portions arranged in an alternate manner;
- and
- an input/output unit connected to an end of the inner conductor,
- wherein the cross section of the outer conductor perpendicular to the signal propagation direction is nonuniform in the signal propagation direction.
Dependencies are inferred from the claim text.