Wideband analog bandpass filter
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United States of America Patent
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Oct 20, 2015
Grant Date -
Aug 4, 2011
app pub date -
Feb 1, 2011
filing date -
Feb 4, 2010
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Abstract
A wideband bandpass filter includes an RF input terminal, an RF output terminal, a plurality of electrically tunable coupling capacitors coupled in series between the RF input and output terminals, and a plurality of resonating circuits each including an electrically tunable resonator capacitor coupled to one of the coupling capacitors. At least one resistance is coupled in series between at least one of the coupling capacitors for providing enhanced out of band rejection of the filter.
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