Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50
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Wireless LAN – WLAN
햸The receiving end also has amplifying and attenuating elements. If the
same an tenna i s used a s at th e trans mitter, the antenna gain is 18 dB and
the loss from cable (again 4m), lightning protection and plug connectors
is 5 dB. The radio signal thus arrives at the receiver's radio module with
the following power:
- 97 dBm + 18 dBi - 5 dB = -84 dBm.
햹From the table for reception sensitivity of the radio module, the attainable
data rate can be read off, in this case 24 Mbps:
This values are the result of a calculation that includes a 'safety
margin' of 10dB. As every radio path is unique, these values can only
serve as a rough guide.
11.5.3 Emitted power and maximum distance
For a simplified calculation of attainable distances and data rates for
AirLancer Extender antennae, please refer to the following table. All tables
include a 10 dB safety reserve and can be considered to be realistic.
For each antenna, the table has a column for point-to-point mode (P2P,
connection between two access points) and for point-to-multipoint mode
Reception sensitivity 802.11a [dBm]
Mbps 5.150 -5.725 GHz 5.725 -5.850 GHz
6-90-85
9-89-84
12 -88 - 83
18 -87 - 82
24 -85 -80
36 -81 -76
48 -76 - 71
54 -73 - 68
72 (Turbo) -78 -73
96 (Turbo) -73 -68
108 (Turbo) -70 -65