RAYNET Antenna Planner dipoles, Moxons, ground planes and end-feds, checked with NEC-2

Each leg (electrical)
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Total
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Wavelength λ
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Height
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Lowest point
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Feedpoint Z
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Footprint
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Band
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Check with NEC-2

models this exact dipole over real ground
Finds the length that resonates at your height and ground, the real feed impedance, SWR bandwidth and take-off angle. Takes a few seconds.

3D view

drag to turn, pinch or scroll to zoom, double-tap to reset
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To scale: the antenna, masts and a 1.8 m person. Run the NEC model to add the radiation pattern.

Cut list

Cut slightly long and trim. Fold back rather than cut until you're sure.

Trim to resonance

Measure where the reactance crosses zero (or SWR is lowest) with an analyser, for example in the Sweep Analyser.

Quick reference, UK bands

Formula lengths for the current layout, K and wire. Click a row to design for that band.