Typical RSSI characteristic is shown below (this is for indicative purposes only and is not a guarantee
of actual RSSI characteristics):
1100
1000
900
800
700
600
500
400
300
200
-130
-120
-110
-100
-90
-80
-70
-60
-50
RF input level (dBm)
Figure 3: Typical RSSI
Module mounting considerations
Good RF layout practice should be observed – in particular, any ground return required by the antenna or feed
should be connected directly to the RF GND pin at the antenna end of the module, and not to the OV pin which
is intended as a DC ground only. All connecting tracks should be kept as short as possible to avoid any
problems with stray RF pickup.
If the connection between module and antenna does not form part of the antenna itself, it should be made using
50Ω microstrip line or coax or a combination of both. It is desirable (but not essential) to fill all unused PCB
area around the module with ground plane.
The module may be potted if required in a viscous compound which cannot enter the screen can
.
Warning: DO NOT wash the module. It is not hermetically sealed.
Radiometrix Ltd, BIM2/3G Data Sheet
page 6
RADIOMETRIX [ RADIOMETRIX LTD ]
