Antenna Design Procedures
Aside from the being technically illegal to be radiating like that (unless you're below the CFR47 Part 15 unintentional radiators limit, at 5V highly unlikely unless your antenna is really inefficient at those frequencies):

Off the top of my head, most people would notice AM radio, CB some of the (really) old RC control stuff.  You'll be hitting several Amateur Radio bands- they may find you before the FCC van does (if you're in the USA) as well as a bunch of international radio bands, amongst other (government) services for long-range communications and radiolocation services.  FCC maintains a table for usage even if not detailed, you have to go to the CFR sections to pull those details out.  

Priority 1 is to reduce your signal strength output- absolutely no reason to be transmitting high field strengths it's all linear.