An Innovative Direct NF-FF Transformation Technique with Helicoidal Scanning

<table>Far-field pattern in the <i>E</i>-plane. Black line: reference 1. Red line: reconstructed via the direct helicoidal NF-FF transformation.</table>

International Journal of Antennas and Propagation

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Figure 7

Figure 7: An Innovative Direct NF-FF Transformation Technique with Helicoidal Scanning 