Interference canceling device
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United States of America Patent
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Mar 25, 2003
Grant Date -
N/A
app pub date -
Nov 23, 1999
filing date -
Dec 8, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An interference canceling device comprising a flat phase IF narrow band BPF. A signal which has been branched from a signal on the main line is filtered by the BPF and is recombined with the signal on the main line. Phase rotation caused by frequency separation from the pass band center frequency does not occur because the phase characteristics of the BPF are substantially flat in the pass band. Thus, interference existing not only in a pin-point frequency, but over a band of frequencies can be cancelled.
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