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Cisco Catalyst 2.4 GHz and 5/6 GHz Dual-Band Polarization-Diverse Directional Patch Antenna (C-ANT9103=)
Installation Notes
Antennas transmit and receive radio signals that are susceptible to RF obstructions and common sources of interference
that can reduce throughput and the range of the device to which they are connected. Follow these guidelines to ensure
the best possible performance:
Install the antenna vertically and mount it with the cables pointing towards the ground.
Keep the antenna away from metal obstructions such as heating and air-conditioning ducts, large ceiling trusses,
building superstructures, and major power cabling runs. If necessary, use a rigid conduit to lower the antenna away
from these obstructions.
In an outdoor environment, connect the antenna to a lightning arrestor and ensure proper grounding.
The density of the materials used in a building’s construction determines the number of walls the signal can pass
through and still maintain adequate signal strength. Consider the following before choosing the location for your
antenna:
— Signals penetrate paper and vinyl walls with little change to signal strength.
— Signals penetrate only one or two solid and precast concrete walls without degrading signal strength.
— Signals penetrate three or four concrete and wood block walls without degrading signal strength.
— Signals penetrate five or six walls constructed of drywall or wood without degrading signal strength.
— Signals are likely to reflect off a thick metal wall and may not penetrate it at all.
— Signals are likely to reflect off a chain link fence or wire mesh spaced between 1 and 1 1/2 inch. (2.5 and 3.8
cm). The fence acts as a harmonic reflector that blocks the signal.
Install the antenna away from microwave ovens and 2 GHz cordless phones. These products can cause signal
interference because they operate in the same frequency range as the device to which your antenna is connected.
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