@Felthry ok those are some wild... impedance matching things?

@starkatt Filters, apparently. They're all pretty standard distributed element filters that you see in circuitry that deals with multi-gigahertz bandwidth signals

the PCB is made of a special material too! FR-4 won't cut it since it doesn't have a well-defined εᵣ; you need to use specially-designed composites usually based on PTFE or polyimide, because you need that low-loss dielectric with well-defined εᵣ
-F

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