Like I outlined in my previous blog, antennas are undervalued and poorly understood elements in WLAN networks. Even Apple is prone to making huge mistakes if you remember the famous “Antennagate” scandal that came about as a result of poor antenna placement and design on their new iPhone.
And as Steve Jobs pointed out, antenna problems are not unique to iPhone or Apple. Many times, antennas are the root of Wi-Fi performance problems. But if you understand RF, then there are common sense things we can follow and avoid. Let’s consider 10 common antenna mistakes and their impact on the end user Wi-Fi experience.
Source : http://7signal.com/blog/10-wi-fi-antenna-placement-mistakes/