Studies on the gain characteristics of 2–4.8 GHz double ridged horn

This paper reports« believed to be for the first time, measured gain values for a 2–4.8 GHz wideband pyramidal horn with double linear ridges. Comparison of these values with the theoretical values obtained by Schelkunoff's gain formula leads to a ridge factor that can fairly bridge the gap between experiment and theory, except for the oscillations in the gain curve caused by multiple diffraction effects. Jull's diffraction analysis is then employed in an attempt to account for the oscillations observed for this horn. A reasonable match is noted. This study can be extended to wideband pyramidal horns in other frequency bands, thereby leading to a possible generalization of gain formula for such horns.