Tunable narrow band filter

cA tunable narrow band radio frequency (RF) filter includes an RF input, an RF output, a capacitive network (-) for coupling the RF input with the RF output and an inductive network (-) for resonating the filter at a predetermined center frequency. A number of semiconductor devices such as varactor...

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Bibliographic Details
Main Author Einbinder, Stephen B
Format Patent
LanguageEnglish
Published 10.08.2010
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Summary:cA tunable narrow band radio frequency (RF) filter includes an RF input, an RF output, a capacitive network (-) for coupling the RF input with the RF output and an inductive network (-) for resonating the filter at a predetermined center frequency. A number of semiconductor devices such as varactor diodes are used for tuning respective capacitors in the capacitive network (-). A single voltage source (V) is used for tuning each one of the respective varactor diodes for moving the resonant frequency of the filter over a substantially wide frequency range.