Hi Jason, yes, tried it once and it definitely didn't improve reception. If you've got a blind spot and had a second antenna in a position to cover the blind spot with a splitter, I think it probably work, but I believe, both antennas would need to be identical, with identical leads and lengths to keep them in perfect balance - the two I tried with very definiely weren't and I think that is why it worsened reception. A good signal combiner would probably sort the balance out, which is what I cocked up! It definitely works with V/UHF radio reception. With microwaves which 1090 is who knows - try it and let us know! HTH
