(and yes, the "simple" low frequency electronics I dismiss are also absolute marvels of engineering and physics. I guess the difference is that those miracles have been standardized into boring black plastic chip carriers, whereas a lot of RF stuff the miracles are still sitting out there at macro-scale where you can look at them. Well, once you've removed the giant shielding cans)
On the other hand look at this other wikipedia image of a YIG filter. The filter itself is the right-hand piece, and don't tell me that's not a precisely laid out arcane sigil.
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