I was wondering if it is possible to design a short boom Yagi Uda beam antenna (such as a 3 element) so that the director and reflector can be electrically reversed from the shack. That is, someone could basically "flip" the antenna around 180 degrees just by flipping some switch in the shack which would somehow reverse the non-driven elements functions from director to reflector and vice versa. Of course this is a compromise solution as all 360 degrees wont be covered as well as with a rotor, but for people that dont want those but want better coverage, maybe this idea has some merit. You could basically pre-aim the beam in your favored general direction and you would get similar coverage in the opposite general direction at the flip of a switch. The other directions would be compromized but still usable. I've seen beams with equal element spacing so it seems the only "tricky" part would be making the director and reflector so their roles can easily be reversed. I would assume both of them could be cut to the proper director length with loading coils to make the reflector length and of course those loading coils would have some type of on/off switch. Maybe someone else has already come up with this design but I was just wondering about it. I didn't research this it just popped into my head. Maybe the 3 element could be designed with the widest E plane coverage such as more than 100 degrees, so that when electically "flipped", it would give you another 100+ degrees coverage all with gain. It seems like this setup would beat an omni antenna and not require a rotor. It may be good for people with close neighbors so that they could position the 3 element beam so it doesn't overhang their neighbors property but they still would get decent coverage off the side of their beam and more than decent coverage in the 2 favored general directions. Since the reflector and director are close to the driven element on many Yagi-Uda designs, maybe this setup can be made to work and will keep the boom short like under 1/3 WL long so for example, at 20m, the boom would only be about 20 ft long which is reasonable.