Antenna Modeller

Antenna Geometry

Start from a preset (sized for the current frequency, except the fixed-size multiband ones)

Feedpoint

Feeder

Type

Z₀ (Ω) Length (m) Velocity factor

Loads & Traps

3D pattern

Drag to rotate · scroll to zoom · shift-drag to pan

Environment

Ground

Solver

Mesh density

Results

Feedpoint impedance–

At the shack end–

VSWR–

SWR on feeder–

Feeder loss–

Peak gain–

Front-to-back–

Efficiency–

Mesh–

Azimuth (elevation = 30°)

Elevation (azimuth = 0°)

Approximate thin-wire method-of-moments solver — treat impedance/SWR as indicative rather than lab-precise, especially for very thick elements. Best used to explore trends: resonance, matching, pattern shape, and how bending/loading/traps/ground change behavior.