Electromagnetic wave frequency filter
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United States of America Patent
Stats
-
Jan 22, 2008
Grant Date -
Nov 30, 2006
app pub date -
Aug 26, 2004
filing date -
Aug 29, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In this electromagnetic wave frequency filter, an electromagnetic wave of a predetermined frequency matching a resonant frequency of a resonator 4.sub.1 is transmitted from an input waveguide 2 to an output waveguide 3 through the resonator 4.sub.1, and is outputted from a drop port P3.sub.1. This filter has an input-waveguide-side reflector 21.sub.1 and an output-waveguide-side reflector 31.sub.1, which reflect the electromagnetic wave of the predetermined frequency. The electromagnetic wave frequency filter satisfies the following relation: Q.sub.inb/(1-cos .theta..sub.1)<
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