How To Achieve Optimal Gain - Cisco HGA9N - Small Business HighGain Omni-Directional Antenna Administration Manual

How to Achieve Optimal Gain

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Cisco HGA9N Administration Guide
Wireless coverage depends on several factors, including power and transmission.
You can calculate exact coverage distance by gathering the specifications of the
access point and the Omni-Directional Antenna and using the equation below.
This equation is not required, but it may be beneficial in optimizing use of your
Omni-Directional Antenna and access point.
In this formula, everything is in dBm or dB.
S
is the received power. Here we plug in the receiver sensitivity to calculate the
r
maximum distance. For example, -82dBm for 11Mbps.
S
is the transmitted power. For example, 18dBm for 11Mbps.
t
G is the transmitter antenna gain and
t
Omni-Directional Antenna).
λ
is the wavelength of the signal. The product of
of light (c).
d
is the distance.
LinkBudget
is the lump sum of additional loss (compared to free space) in the path.
G is the receiver antenna gain (9dBi for this
r
λ
and frequency equals to speed
1
9