Cisco HGA9N Administration Guide
10
1
Distance Calculation Examples
You can use the information in the tables below to determine how you want to
place the Omni-Directional Antenna in relation to the access point to client device
or between the two access points.
As you can see, the higher the transmit data rate, the shorter the coverage
distance. Therefore, when a client device moves further away from an access
point, the data rate will fall back to a lower data rate.
Table 1 Coverage Distance from Access Point to Client Devices
Table 2 Coverage Distance from Access Point to Access Point
To obtain these calculations, we inserted the specifications of the access point
into the formula as described previously. We use 9dBi peak antenna gain and
assume 0dBi antenna gain at the client device. Link budget is set to 10dB to
include radio wave attenuations from different types of objects in the path (the
actual value may vary).
Data Rate
11 Mbps
54 Mbps
Distance
0.88 km
.55 miles
0.12 km
0.078 miles
Data Rate
11 Mbps
54 Mbps
Distance
2.49 km
1.56 miles
0.35 km
0.22 miles
