Technologies for Near-Field Focused Microwave Antennas

Figure 1

Focused beam of the field radiated by an NFF planar array of circularly polarized patches: isosurfaces at −3 dB and −6 dB. The −3 dB and −6 dB focal spots at the focal plane have been added, in the horizontal plane of the plot. The array is located at the surface of the reference system. The focal plane and the maximum field amplitude plane are at around 1 m and 77.5 cm from the array surface, respectively.