Multiplexing circuit and designing method therefor
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United States of America Patent
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Jul 23, 2013
Grant Date -
Jun 11, 2009
app pub date -
Aug 31, 2006
filing date -
Sep 5, 2005
priority date (Note) -
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Abstract
The present invention includes two or more bandpass filters, for passing signals of mutually different frequency bands therethrough, including one or more stages of units having coupling devices and resonance circuits coupled, in a tap type, to the coupling device, one end of each bandpass filter is directly connected to a common port, the coupling device and the resonance circuit of the first stage nearest to the port of each bandpass filter has a function of impedance matching means for each bandpass filter, in addition to a function of resonance means, respectively.
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