[DonRotolo]

If you are moving and accurately keep track of your motion, it's possible to use math to bring the accuracy well below 22 degrees. That's just the precision of the Ramsey kit. There are alternatives.

I'm doubtful that adding antennas will help accuracy or precision, instead it may just add complexity for no performance gain.

As for the math, think about watching the display with your eyes and noting where it points when the dots change, do that enough times and you can narrow down the most probable direction. Or, to put it another way: Triangulate from ~50 points and you can narrow down the 'zone'.