A Probe-Compensated Helicoidal NF-FF Transformation for Aperture Antennas Using a Prolate Spheroidal Expansion

Figure 9

Dual horn, vertical polarization. 𝜑 cut of the 𝜗 component of the far field. Blue solid line: proposed approach. Red dashed line: approach in [7, 8]. Black dash-dot line: standard, probe compensated NF-FF transformation.