I have kind of a "creative" solution for my antenna: When I decided to get rid of my 89LX 5.0 and get yet another Supra back in '01--something for which some of my domestic-loving friends still haven't forgiven me--I decided to swap over as many of the parts as I could, including the high-end Alpine CD player, amps, speaker separates, sub box, etc. Thing is, I really didn't want to use a power antenna in my 88 Turbo, as I'd had "a few problems" with the power antennas in the other Supras I had. I started by removing the factory power antenna and I filled the antenna hole. Next, I removed the steel mast-style antenna from my Mustang (from which I was still removing performance parts), as well as the antenna receptacle in the passenger side fender and the antenna cable that plugged into the bottom of the receptacle. I spliced the Mustang's antenna cable into the Supra's antenna cable and plugged it into the Mustang's antenna receptacle, connected everything properly, then jammed the Mustang's steel antenna mast into the Supra's rear passenger fender. I screwed the steel mast into the mast receptacle, then made sure everything was hooked up properly one last time. Upon making POSITIVELY sure that everything was right, I clicked on my Alpine to see how well all this worked. For all but the weakest FM stations, this actually worked perfectly...signal loss was pretty much nonexistent. To pull in the weakest stations out there, I added a powered FM antenna booster to this setup, just to be on the safe side. Granted, AM reception absolutely sucks, but unless I'm trying to pull in KMOX (a very large news/talk station) for any sort of weather report, I'm not really interested in AM reception--and AM is positionally-based, rather than antenna based, sooooooo...
It's a "creative solution", but it's worked well for me...