Thank you for posting your inquiry in the Intel Support Communities.
It would be interesting to know the signal strength you get when you are close to the router. Normally it is expected to be between 0 and -30 dBm. If a program like inSSIDer* 3 reads -50, -70 or so at such distance, it can be related to the antennas. If that is the case I suggest you contacting the system manufacturer for assistance.
If the signal strength is good within close range but it only drops when distance is increased the problem may be caused by interference from other wireless devices or walls. Please indicate the wireless band being used 2.4 or 5 GHz if more help is needed.