Bandstop filter having symmetrically altered or compensated quarter wavelength transmission line sections

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