There have been several questions that revolve around e.g. wave propagation in waveguides, antenna array factors, noise in electronic systems etc.
Though most of them are pretty clearly "better off" on electronics.SE (because the experts there focus on the –well– electronic side of the signal) and not really on-topic here (because they don't concern themselves with processing or theory of signals), it's often unnecessarily complex to convey that notion to the asker:
"It's RF signals!"
Since EE is clearly the closest-related engineering field to this site, could we have the delegation to that site as option (we so far only have meta.signals, which rarely is useful):
This should be listing an electronics.stackexchange.com option, too.
Same argument, by the way, can be made for math and stats.
The benefit to the folks asking would be a direct path to the right site, and for us, an easier way to kindly express "please go where this is more on-topic" without having to invest commenting time.