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Rahlblick – HF safety calculator
Strahlblick is an RF field strength and safety distance calculator according to ICNIRP guidelines. The tool helps radio amateurs to calculate the electromagnetic field exposure of their antenna system and to check compliance with safety limits.
🎯 Features
- EIRP calculation: Effective isotropic radiated power taking into account antenna gain and cable losses
- Safety distances: Automatic calculation for general population and occupational exposure
- Power density: Calculation of the field strength at any distance with ICNIRP limit comparison
- Near field/far field analysis: Detection whether the evaluation distance is in the near or far field
- Multi-band analysis: Cumulative calculation when operating on multiple bands
- Visualizations: Safety zone diagram and power density chart
- Presets: Quick selection for power, antennas, operating modes and typical scenarios
- PDF export: Documentation of the calculations as a PDF report
- Multilingual: Available in German and English
📋 Scenarios
Predefined scenarios for fast calculations:
- QRP Portable – Low power for outdoor use
- Home station HF – Typical HF home station
- Contest Station – High performance for competitions
- VHF mobile operation – mobile 2m operation
- UHF handheld radio – 70cm handheld radio
- EME station – Earth-Moon-Earth operation
📚 Learning material
Integrated information on EIRP, near field vs. far field, ICNIRP guidelines, duty cycle and safety measures.