User's Manual
Table Of Contents
- 1. Overview
- 2. Applications
- 3. Features
- 4. Technical data
- 5. Mechanical size
- 6. Soldering profile
- 7. Pin assignment
- 8. PCB design
- 9. Clock
- 10. Application circuits
- 11. Programming
- 12. Pre-flashed firmware
- 13. Adapter boards
- 14. Radio certification
- 15. Ordering information
- 16. Packaging dimension
- 17. Revision notes
- 18. References
User Manual
Version 1.1c
2013-07-01
OEM radio modules deRFmega
www.dresden-elektronik.de
Page 40 of 52
8.6. Placement on the PCB
The PCB design of the radio module base board and placement affects the radio
characteristic. The radio module with chip antenna should be placed at the edge or side of a
base board. The chip antenna should be directed to PCB side.
Figure 31: Placing at the edge
Figure 32: Placing at the center edge
Do not place the chip antenna radio module within the base board. This will effect a very
poor radio performance. Instead radio modules with RF pads could be placed everywhere on
the PCB. But it should be enough space for routing a RF trace to a coaxial connector or to an
onboard antenna.
Figure 33: Placing in the center with antenna
Figure 34: Placing in the center with RF pad
Do not place ground areas below the radio module (see Section 8.4) and near the chip
antenna.
Figure 35: No ground plane under the module