Three-notch band pass filter based on stepped-impedance resonator and open circuit branches
A band-pass filter and stepped impedance technology, applied in circuits, waveguide devices, electrical components, etc., can solve the problems of large size, non-adjustable notch, etc., and achieve simple design, adjustable band-pass characteristics, and convenient processing. Effect
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[0018] The invention designs a three-notch band-pass filter based on a ladder impedance resonator and an open branch, and the filter has adjustable notch waves and adjustable pass bands.
[0019] Below in conjunction with accompanying drawing this invention is described in more detail:
[0020] Such as figure 1 As shown, the triple-notch bandpass filter based on the stepped impedance resonator and the open stub designed by the present invention, the λ / 4 short-circuit stub resonator (101) of 4 folded structures, the stepped impedance resonator (102), two The input and output ports (103), double open-circuit stubs (104), and the half-wavelength microstrip line (105) are made of copper material.
[0021] An example of the present invention is figure 2 As shown, the dielectric substrate (106) is RT / Duorid5880 with a dielectric constant of 2.2, the thickness of the dielectric substrate is 1.0 mm, and the metal ground plate (107) under the dielectric substrate is made of copper m...
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