Pretty much the only solution I can think of is to use more directional antennae. I've used a similar product, but stopped as I never could get smooth/static free transmission. Oh yeah, alternatively you could put a grounded shield around your devices leaving open the 'line of sight' bewteen the two. That might help some. The shields do have to be grounded or they won't work. Basically aluminum foil hats for your gear.

-Zeke