LC filter board PCB designs.
Allows for a wide variety of LC filters (up to 5-pole) to be rapidly prototyped.
Capacitor pads are 0805, but 0603 and 1208 will fit if hand-soldering. Pads are doubled up to allow fine-tuning by adding a second, smaller capacitor. Use of low ESR/ESL C0G type recommended.
Inductors pads are custom pads that allow any of the following to be installed from convenient Coilcraft deigner kits:
Coilcraft 1812LS - Ferrite core chip inductors 12-1000uH
Coilcraft 1812CS - Ceramic core chip inductors 1-33uH
Coilcraft 1515SQ, 2222Q, 2929Q - Air core inductors 47-500nH
Filters can be designed using the iFilter feature of AWR Design Environment, for which free educational licenses are available. Elsie is a simpler, but somewhat outdated, alternative.
Boards designed using Altium Designer 19. Pdf files can be found in releases.
An enclosure design is forthcoming. In the mean time, edge mount SMAs can be used for testing.