One major drawback of Wi-Fi is its weak security features, which make these wireless networks vulnerable to intruders.
Another drawback of Wi-Fi networks is susceptibility to interference from nearby systems operating in the same spectrum, such as wireless phones, microwave ovens, or other wireless LANs.
Wireless networks based on the 802.11n specification will solve this problem by using multiple wireless antennas in tandem to transmit and receive data and technology to coordinate multiple simultaneous radio signals.
This technology is called MIMO (Multiple Input Multiple Output).