Helical resonator bandpass filter - 4.3 out of 5 based on 8 votes

# Online calculators

## Helical resonator bandpass filter.

The calculation is based on the method described in the book: "Handbook of Filter Synthesis, A.I.Zverev 1967 p.499-521", see more...

ENTER THE INPUT DATA:
 f0 =  MHz –  Working frequency ΔF =  MHz –  Bandwidth-3dB α =  dB –  Admissible loss in the passband Ri =  Ω –  Input impedance Ru =  Ω –  Output Impedance

RESULT:
 Qu = – Unloaded Q of the resonator Z0 = – The characteristic impedance of the resonator [Ω] α0 = – Estimated losses in the passband [dB]

 d =  cm – Diameter of the helix b =  cm – The length of the helix S =  cm – The width of the box shield H =  cm – The height of the box shield τ =  mm – The helix winding pitch d0 =  mm – The diameter of the wire N = – Number of turns of helix tapi = – Input tap (number of turns) tapu = – Output tap (number of turns) h =  cm – Helix above of shielding wall K =  cm – The height of shielding wall

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