CPC H01Q 19/062 (2013.01) [H01Q 3/14 (2013.01); H01Q 13/02 (2013.01)] | 19 Claims |
1. A three-dimensional near-field focus-steering antenna for GHz or THz frequencies comprising:
first and second rotatable discrete dielectric metalenses, each metalens including arrays of subwavelength dielectric projections, the discrete dielectric metalenses being counter-rotatable and co-rotatable to change a radial and azimuthal focal position, respectively, the first and second discrete dielectric metalenses being arranged along a z-axis;
a feed source emitting radiation incident on the first discrete dielectric metalens;
a z-axis translator configured to change the relative inter-lens position of the first and second discrete dielectric metalenses to move a position of a focused beam along the z-axis;
the position of the focused beam being scannable within a three-dimensional cylindrical space.
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