SLWSTK6101B Datasheet, PDF (44/84 Pages) Silicon Laboratories – BGM113 Blue Gecko Bluetooth ® Module Data Sheet

The layouts in the next figure will result in severely degraded RF-performance.
BGM113 Blue Gecko Bluetooth ^® Module Data Sheet
Layout Guidelines
Figure 6.2. Non-optimal Application PCB Layouts for the BGM113 Module
Figure 6.3. Effect of Ground Plane on Antenna Efficiency for the BGM113
6.2 Effect of Plastic and Metal Materials
Do not place plastic or any other dielectric material in closs proximity to the antenna.
Any metallic objects in close proximity to the antenna will prevent the antenna from radiating freely. The minimum recommended dis-
tance of metallic and/or conductive objects is 10 mm in any direction from the antenna except in the directions of the application PCB
ground planes.
6.3 Locating the Module Close to Human Body
Placing the module in touch or very close to the human body will negatively impact antenna efficiency and reduce range.
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