User's Manual
Table Of Contents
User Manual
Version 01.01
2011-12-22
Radio modules deRFarm7
dresden elektronik
ingenieurtechnik gmbh
Enno-Heidebroek-Str. 12
01237 Dresden / Germany
Tel.: +49 351 – 31 85 00
Fax: +49 351 – 3 18 50 10
wireless@dresden-elektronik.de
www.dresden-elektronik.de
Page 12 of 38
5.5. PCB design
The PCB design of the radio module base board and placement affects the radio characteris-
tic. The radio module should be placed at the edge or side of a base board. The chip anten-
na should be directed to PCB side.
PCB
OK
PCB
Do not place ground areas below the radio module and near the chip-antenna.
PCB
No Ground
Plane
If the base board with the radio module will be placed into a metal case, it is necessary to
use the radio module variant with coaxial connector and an external antenna.