User's Guide
Table Of Contents
- 1. WFM200 Pinout
- 2. Device Configuration
- 3. Features Description
- 4. Power Supplies
- 5. Application Schematic Recommendations
- 6. Typical Application Schematics
- 7. Layout Recommendations
- 7.1 Generic RF Layout Considerations
- 7.2 GND and RF Pads Including the Diversity Port and External Antennas
- 7.3 Module Antenna
- 7.3.1 Small Board Size Recommendations for Good RF Performance
- 7.3.2 Extended X Dimension Recommendation for Good RF Performance
- 7.3.3 Y Dimension (65 to 80 mm) Recommendation for Good RF Performance
- 7.3.4 Y Dimension (80 mm or Larger) Recommendation for Good RF Performance
- 7.3.5 WFM200 Portion One Corner Bias with 3 mm Metal Keep-Outs
- 7.3.6 Recommended Antenna Loop Trace Capacitor Values
- 7.4 WFM200 Reference Evaluation Board
- 8. Recommendations for Certification
- 9. Package Outline
- 10. Integral Antenna Loop and Keep-Out Required Dimensions
- 11. Recommended PCB Land Pattern
7.3.5 WFM200 Portion One Corner Bias with 3 mm Metal Keep-Outs
Figure 7.8. Reference Design for Extended X- and Y-dimensioned PCB Sizes with WFM200 Portion in Corner*
Note: Spaces filled in black represent metal keep-outs on the PCB in the figure above.*
If the available metallization size of WFM200 section is equal to or smaller than 15 mm x 35 mm on a space-restricted design, then
better performance can be achieved when the metal keep-out gap is set to 1 mm. Also, shift the WFM200 module to north to ensure
close to 22.5 mm PCB metal width on the antenna loop side of the WFM200. The center of pin 49 is 1.8 mm from the metal edge.
UG395: WFM200 Hardware Design User's Guide
Layout Recommendations
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