I bought a 15dbi omni directional Dlink wifi antenna. I have DWL-2100AP.

Now I want wireless access throughout my home.

I mounted this antenna on roof (single story house), 30feet above ground on a pole. I ran LMR400 Low Loss cable, and a pig tail between antenna and this AP. Even with such a high gain antenna, the performance was no better than with it's factory 2dbi antenna. Checked the cables, connectors and connections all seem fine. Any ideas why?

With line of sight, the range isn't any greater than 40feet from antenna. The AP is located indoor, the antenna mounted on roof exposed. Within house I didn't see any difference between 2dbi and 15dbi.

Indoor, it doen't work more than 35feet from antenna. As said, this is similar result to 2dbi factory omni antenna.

Please help!