Cisco Cisco Aironet 350 Wireless Bridge Hoja De Datos

 

 

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Figure 2.    Directional Patch Antenna 

 

Figure 3.    Yagi Antenna 

 

Diversity antenna systems are used to overcome a phenomenon known as multipath distortion or multipath 

interference. A diversity antenna system uses two identical antennas, located a small distance apart, to provide 

coverage to the same physical area. 

Multipath interference occurs when an RF signal has more than one path between a receiver and a transmitter. 

This occurs in sites that have a large amount of metallic or other RF reflective surfaces. 

Just as light and sound bounce off of objects, so does RF. This means there can be more than one path that RF 

takes when going from a transmit (TX) and receive (RX) antenna. These multiple signals combine in the RX 

antenna and receiver to cause distortion of the signal. 

Multipath interference can cause the RF energy of an antenna to be very high, but the data would be 

unrecoverable. Changing the type of antenna and location of the antenna can eliminate multipath distortion 

(Figure 4).