How To Achieve Optimal Gain - Linksys HGA9N User Manual

High Gain 9dBi Omni-Directional Antenna

How to Achieve Optimal Gain

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 Antenna and using the equation
below.
Using this equation is not needed in order to place the Antenna and the access point, but it may be beneficial in
optimizing use of your Antenna and access point.
S r = S t + G t + G r
In this formula, everything is in dBm or dB.
S is the received power. Here we plug in the receiver sensitivity to calculate the maximum distance. For
r
example, -82dBm for 11Mbps.
S is the transmitted power. For example, 18dBm for 11Mbps.
t
G is the transmitter antenna gain and G
t
λ
is the wavelength of the signal. The product of
d is the distance.
LinkBudget is the lumpsum of additional loss (compared to free space) in the path.
Chapter 2: Planning Your Wireless Antenna Coverage
λ
⋅ ⋅
+ 20 log --------- - – 20 log
4 π ⋅
is the receiver antenna gain (9dBi for this Antenna).
r
λ
and frequency equals to speed of light (c).
d ( )
– LinkBudget
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