User's Manual

14
Layout Design Suggestions
• General Layout Rules- All Printed Circuit Boards must comply with UL94V0 standard for
flammability. Always use RoHS compliant Parts and materials.
• Suggestions for Layout:
1. Do not place Power circuit, X’tal, Inductor, etc near RF area.
2. The bigger Antenna clearance area, the better. The Antenna itself needs to stay away from any
circuit or component at least 3mm. Antenna clearance area means Top and Bottom both
required to be cleared.
3. Do not use metal materials on design where near Antenna area. For example, battery snaps,
USB connector, iron case, etc.
These guidelines are for design reference; real performance still depends on actual design.