Overview
Troubleshoot poor antenna matching, high VSWR, low range and unstable RF performance.
Design checklist
- Measure with a VNA when possible.
- Tune in the final enclosure.
- Check matching parts, soldering and ground plane.
- Verify the antenna connector, cable and antenna orientation.
Practical notes
RF layout is sensitive to trace geometry, return current, grounding, enclosure materials and nearby components. Always compare your layout with the RF module or antenna manufacturer reference design.
Common mistakes
Common mistakes include routing under antennas, broken ground return paths, long matching network traces, poor connector grounding and tuning before the final enclosure is built.