Increasing broadband wireless signal strength?

[nikeaf]

broadband wireless signal strength is -113 or so. would an
antenna help increase my signal???? winter signal is fine
summer signal drops......leaves???????......down the road
my signal picks up to -85.......im am about 5mi from tower
thanks

 

[dgatwood]

broadband wireless signal strength is -113 or so. would an
antenna help increase my signal???? winter signal is fine
summer signal drops......leaves???????......down the road
my signal picks up to -85.......im am about 5mi from tower
thanks

What kind of outdoor antenna are you using now? Is this Wi-Fi? WIMAX? Something else?