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J-Pole Antenna Calculator
3/4-wave J-pole dimensions
📖 J-Pole Antenna Calculator
A classic J-pole consists of a half-wave radiator and a quarter-wave matching stub. Lengths (meters) ≈ 143 / f(MHz) × velocity factor. The stub is 0.75 × radiator length.
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💡 Tips & Information
- J-Pole Antenna Calculator uses standard engineering formulas; always verify with project requirements.
- Keep units consistent across all inputs to avoid conversion errors.
- Field conditions, tolerances, and safety factors may require additional adjustments.