Bandstop filter

Details Bandstop filter Bandstop filter

H - Electricity

03

H

H03H 9/205 (2006.01) H01P 1/208 (2006.01) H01P 1/209 (2006.01)

Patent

CA 2061421

Abstract of the Disclosure A multi-resonator notch filter incorporates a variable impedance transmission line with impedance values going from a relatively low value and increasing upward to a relatively high value then back down to a relatively low value again. A plurality of resonant cavities is coupled to the relatively high central impedance line section of the filter at odd multiples of quarter wavelength intervals. Other resonators can be coupled to lower impedance sections of the transmission line. The locations of selected resonators on the quarter wavelength intervals can be altered thereby increasing and decreasing the nominal quarter wavelength intervals of selected internal pairs by a predetermined amount thereby providing acceptable levels of performance with fewer resonators.

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