Comb-line high-frequency band-pass filter having adjustment for varying coupling type between adjacent coaxial resonators
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United States of America Patent
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Feb 14, 1995
Grant Date -
N/A
app pub date -
Jun 16, 1993
filing date -
Dec 17, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A high-frequency bandpass filter, including 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. The second end of each conductor rod includes a portion (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 the distance between the first ends of the conductor rods (3, 4) of the coaxial resonators to a distance between the portions (4) with a larger diameter.
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