5th-Order LC Filter board
This is a board for building 5th-order LC filters. Both Low-pass and High-pass
filters are possible by simply swapping L and C components.
- Small Size
- SMA connections using commonly available end-launch jacks
- Low-pass or High-pass depending on components.
- Uses readily available 0603 SMT packages
The schematic is set up to use a shunt topology - the first reactive element
is from signal to ground. This works for either low-pass or high-pass. I've
had good results using this online design page:
LC Filter Design
As an example, for a 20MHz low-pass I've used the following values
For a 3MHz high-pass I've used the following values
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