The best replacement for ground plane is dipole.

The best alternatives to ground plane are rated as following:
★★★★★  dipole
★★★★★  j pole
★★★  counterpoise
★★★  star ground
★★★  vertical dipole
★  power plane

Your alternative for ground plane is not listed? Suggest!
Speaking about ground plane, one probably shouldn't forget about antenna.

Other search terms related to ground plane and their ratings are:
★★★★★ antenna
You have in mind a companion for ground plane and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of ground plane in all years. Click on graph for more.
ground plane
dipole
j pole