Antenna Gain
Main-lobe geometry
The existing beam view shows how aperture size in wavelengths sets the half-power and first-null widths.
Angular spread is enlarged for readability; the calculated widths appear below.
Aperture diameter
1.20 m
48.0 wavelengths
Effective aperture
0.622 m²
55% of 1.131 m²
Wavelength
0.0250 m
12.000 GHz carrier
Far field begins
115.3 m
2D² / wavelength estimate
Peak gain
40.98 dBi
12,524× isotropic
Half-power beamwidth
1.46°
Approximate 3 dB beamwidth
First-null beamwidth
2.91°
Circular aperture estimate
Effective aperture
0.622 m²
0.0250 m wavelength
Open Source and Easy to Use Elsewhere
This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.
Open source: review the implementation and see how the results are produced.
Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.