Originally Posted by
Ken Webb
Asked Futaba about dual ant. They call it a dual diversity ant. Which ever ant. receivesthe best signal that's the one that's used. Simple explanation.
The way diversity antennas work is that the PHY looks at the RF energy present at each antenna prior to the start of the "packet" of data (called the preamble). Most diverstiy algorithms just select the antenna with the strongest signal as the "best", which it might not be. For digital data, they don't switch in the middle of the packet, as that results in lost data. The strongest signal may be due to multipath (two reflected signals adding together), or from a stronger interference generator (like a leaky microwave oven, or a WiFi device transmitting in the vicinity).