Patent ID: 11909115
Assignee: CITY UNIVERSITY OF HONG KONG
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
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.