Why would a wireless access point have two antennas?
Some APs do have just one antenna, but most have a pair of diversity antennas. An AP with diversity antennas continuously samples incoming signals, choosing the input source (antenna and receiver) with the best signal, then using the chosen antenna for the next transmission.
Diversity antennas help to defeat multipath, a phenomenon that occurs when RF signals reflect off objects in their path. As a result, the AP may receive both the primary signal and one or more reflections of that same signal. Diversity algorithms let the AP use the best signal at any given time, adjusting automatically for changing environmental conditions.
Dig deeper on Wireless LAN Implementation
Related Q&A from Lisa Phifer, Wireless Networking Expert
Wireless expert Lisa A. Phifer explains to what extent WEP cracking remains a worrisome issue. It all depends on your company's WLAN security policy.continue reading
Wireless expert, Lisa Phifer explains that it may not be worth enhancing Wi-Fi ad hoc mode since Wi-Fi Direct is a better alternative for enabling ...continue reading
Wireless expert Lisa Phifer responds to a question regarding a Mi-Fi and Android smartphone mobile hotspot comparison. She provides an in depth ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.