| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a filter which is miniaturized in a stereoscopic structure such as a waveguide or a coaxial line, and sets each of a pass band and a block band at a desired value. <P>SOLUTION: The filter has an inductive window 2 which consists of a bar-like or plate-like to be inserted between two input/output waveguides 1 from a direction perpendicular to a transmission path 5, and an uneven plate-like body 4 which is inserted from a direction perpendicular to the transmission path 5 and has a convex portion 4a mainly forming capacitance in the transmission path 5 and a concave portion 4b mainly forming inductance. A parallel resonant frequency band which has mainly the inductance of the inductive window 2 and the capacitance of the body 4 is defined as a pass band, and a serial resonant frequency band by the capacitance and the inductance of the body 4 is defined as a block band. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
