Double-ridged horns, 1–18 GHz

Overview

Measurement horns for EMC testing, calibration and antenna measurements: ridges with a smooth profile, a coaxial transition through the gap between the ridges, solid or open side walls. A horn with a Vivaldi plate is on the Vivaldi page.

From the simplest to the most complex: a small 6–18 GHz horn with solid walls, up to a 1–18 GHz horn with smooth ridge profiles, a coaxial transition through the gap and open side walls.

Typical performance

• Band up to 18 : 1 (1–18 GHz), VSWR ≈ 1.5–2.5typical
• Gain ≈ 6–17 dBi, rising with frequencytypical
• Beamwidth ≈ 20–60°, narrower at the upper frequenciestypical
• Linear polarisationtypical

Typical values describe the antenna class, not a guarantee for a unit; “computed” marks our own simulated example.