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Knowledge Base
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/ Propagation & Field Calculators
/ Antenna Field Strength Calculator

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Propagation & Field Calculators

Electrical Conversion Calculators

Antenna Design & Performance Calculators

Frequency & Wavelength Calculators

Antenna Field Strength Calculator

Estimate electric field strength at a specified distance from an idealized transmitting antenna under free-space far-field conditions. Enter transmit power and distance to calculate mV/m and dBµV/m. An optional frequency input checks an approximate far-field boundary.

The antenna factors represent idealized directional values. Actual fields depend on the installation, losses, surroundings, polarization and observation direction.

Antenna Type:

Power Unit:

Transmit Power:

Distance (km):

Frequency (optional - for far-field validation):

Result: - mV/m

Result: - dBµV/m

Calculation examples:

100 W, half-wave dipole, 5 km: 14.0 mV/m (82.9 dBµV/m)
The turnstile value applies to the horizontal plane.

This calculator is intended for engineering estimates under idealized free-space far-field conditions. It does not model cable loss, mismatch, reflections, terrain, obstructions or regulatory measurement procedures.

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