Antennas — Tool

Beam coverage animator

View the 3 dB beam cross-section using digitised manufacturer data, with E-plane beamwidth defining height and H-plane beamwidth defining width. Calculate the minimum beamwidth across a frequency sweep and the corresponding coverage at the selected test distance.

Inputs

Antenna

Sweep start (GHz)

Sweep stop (GHz)

Distance to target (m)

Worst-case beamwidth in sweep—

Occurs at—

Coverage at distance (worst case)—

Opens a print-ready report — save as PDF from the print dialog.

—

E-plane (height)H-plane (width)

Reading the result

The oval shows the beam’s −3 dB contour relative to boresight. The reported minimum beamwidth is the smallest E- or H-plane value within the selected sweep. Use it to assess coverage over the full frequency range.

Coverage at a flat target is calculated as 2 · d · tan(θ/2). For the 3115 over 0.75–18 GHz at 1 m, the minimum width is approximately 16 cm. Wide-band RS103 planning may require multiple antenna positions or separate frequency bands; check coverage for each band.

Curve data is digitised from manufacturer half-power beamwidth plots to about ±2°. It represents typical performance — a specific serial number, mounting arrangement and site will differ. Verify coverage for formal work against your antenna's calibration data and the applicable standard.

Antenna library: ETS-Lindgren 3115, 3117, 3106, 3106B and 3144 LPDA, plus an unidentified 1–2 GHz horn. The 3106 and 3106B are different models.