Some no radial antenna work rather well. The 1/2 wave stationmaster CB antenna is one design. No radials, needs to be 1/2 wave off the ground with the feedline running straight down so that the feedline and mast are the other half of the antenna. The problem is, its only going to work on 1 band and to scale it up to lower bands it becomes unwieldy and large. I use a trapped vertical for 20, 15 and 10m with 4 elevated radials. and that fits in a tiny space.