What is multi-pathing and why don’t the OMNEX Trusted Wireless™ 900MHz radios have two (2) antennas like most WLANs?
Multi-pathing is a condition where radio waves leaving a transmitter take different paths to a receiver (due to reflections off of obstacles) and end up reaching the receiving antenna out of phase with one another. As a result, if two or more radio waves arrive out of phase at one antenna, chances exist that the opposing waves could cancel each other and result in a ‘nulling’ of the radio signal (no reception). WLAN radios use two antennas to try to overcome such nulls by placing the receive antennas in two physically different paths. Rather than physically changing the path, frequency hoppers overcome multi-path null conditions by constantly changing frequencies. Why does this work? Since different radio frequencies have different wave characteristics, signals sent on different radio frequencies will not behave the same in any given environment. This means that a null occurring at one frequency, in a highly reflective refinery for example, will not occur on another frequency because t
