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wiki:projects:filters:lpf_vhf

VHF : 180Mhz LPF

This filter is intended for 2m amateur radio band.

This filter is two pi cell, inductively coupled (L4).

My requirement for this filter are 50dBm power handling, less than 1dB of loss in 2m band and at least 40dB isolation at 291,6Mhz.

  • L2, L6 : 1812SMS-56N
  • L4 : GA3092-AL
  • C1,C3,C5,C7 : Johanson Technology S111DUE Kit

To avoid a loss of isolation at high frequency, coupling must be avoided between cells. Thefore, a conductive enclosure is mandatory.

Mesurement

Loss at the frequency of interest is only 0.6dB.

wiki/projects/filters/lpf_vhf.txt · Last modified: 2020/04/19 19:41 by f4hvx