RF usually has not too many transistors, but sometimes a lot of coils and capacitors. You can see the coils in the design, somewhat snake-like. Capacitors can

RF usually has not too many transistors, but sometimes a lot of coils and capacitors. You can see the coils in the design, somewhat snake-like. Capacitors can be realized in many ways, conducting material over a dielectric. Bulk capacitors are external (as you can see). Matching LC are external because those depend on the antenna; I'm a little disappointed there wasn't more detail given of the antenna, because this type I believe is a 'first' for the RPi 'in-board' antennas, in that they have two lines of series-connected capacitors inside the 'triangle'. I don't yet know how this works. RF ICs are usually hand-routed, too. So you get to see some real 'Art'.