I read that a horizontal polarization antenna is better for forested area with trees. I would appreciate if someone could let me know whether there is any type of polarization that is better than the other for power line interference. Vertical, horizontal, circular? I have a wireless client talking to my AP across the top (just slightly above) a cross country power line that I cannot avoid. I am just wandering what would be the best antenna to use. I am using Yagi at the client and now deciding whether to use a sector or Yagi at the AP. I don't know whether there is any advantage for using a vertical or horizontal polarization in this connection.