Parabolic Antenna Link Budget Calculator

Parabolic Antenna Link Budget & Lobe Simulator

Enter parabolic dish parameters and link settings to compute antenna gain, beamwidth, FSPL and received power. A live polar lobe plot approximates the main lobe.

Inputs: Antenna & Link

Frequency (MHz)

Enter operating frequency in MHz

Distance (km)

Link distance in kilometers

Tx Dish Diameter (m)

Transmit parabolic dish diameter in meters

Rx Dish Diameter (m)

Receive parabolic dish diameter in meters

Tx Efficiency (0–1)

Rx Efficiency (0–1)

Tx Power (dBm)

System Losses (dB)

Receiver Noise Figure (dB) — optional

Used to estimate SNR (optional). Assumes 1 Hz bandwidth unless you set it below.

Signal Bandwidth (kHz)

Extra Misc Loss (dB)

Tip: For two identical parabolic dishes, set Tx/ Rx diameters equal. Beamwidth shown is approximate - useful for planning and visualizing the main lobe.

Radiation Lobe & Visual

Polar plot: normalized power pattern (dB scale). Use Calculate after changing inputs.