Ring filter wideband band pass filter using therewith

Details Ring filter wideband band pass filter using therewith Ring filter wideband band pass filter using therewith

2004-02-20

2008-10-28

Lee, Benny (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S219000

Reexamination Certificate

active

07443271

ABSTRACT:
In order to provide a band pass filter for high wavelength which has a wideband, small insertion loss and flat passband and obtains steep attenuation, a plurality of ring filters, in which, an input terminal of a high-frequency signal is provided to an arbitrary point on a line in a microstripline ring resonator having the line with one wavelength at electrical length, an output terminal is provided to a point positioned at a half wavelength at electrical length from the input terminal, a open stub of ¼ wavelength at electrical length (or ½ wavelength short stub) is connected to a point positioned at ¼ wavelength at electrical length from the input terminal, are connected by cascade connection with attenuation pole frequencies being different.

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