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Dipole antenna simulator.

Dipole Antenna Simulator

Interactive E-Field, Current & Impedance Visualizer

How to use this simulator:

  • Custom Input: Type your exact Operating Frequency or Physical Length into the input boxes, or use the sliders to experiment dynamically.
  • Visualizing Standing Waves: The wire in the diagram takes up the full width for clarity. The RED graph shows Current (I) magnitude, and the BLUE graph shows Voltage (V) magnitude along the wire. Notice how Current is always zero at the antenna tips!
  • Experiment: Increase the length beyond 1 wavelength (1.0 λ) and watch how the radiation pattern splits into multiple lobes.
  • Auto Tune: Click the green button to instantly calculate the perfect resonant half-wave length (0.48 λ) for your chosen frequency.
Electrical Length:
0.480 λ
Current (I) & Voltage (V) Distribution
Radiation Pattern (Free Space)
SWR (50Ω System)
1.50
Impedance (Z)
73 ± j0 Ω
Antenna State
Resonant
Max Gain
2.15 dBi
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