City University of Hong Kong

Ka Fai Chan

Chi Hou Chan

Gengbo Wu

Kam Man Shum

Junyan Dai

Chenfeng Yang

A metasurface structure for an antenna. The metasurface structure includes multiple subwavelength units operable to manipulate or control amplitude, phase, polarization, frequency, and momentum of electromagnetic waves for radiation. The metasurface structure may be operably coupled with a waveguide to provide a metasurface antenna. The metasurface structure or the metasurface antenna may be operably coupled with a controller arranged to control it.

Metasurface antenna and metasurface structure for antenna

An antenna includes, at least, a metasurface structure assembly and a feed. The feed is coupled with the metasurface structure assembly and is operable to provide a first type of electromagnetic radiation with a first radiation property to the metasurface structure assembly. The metasurface structure assembly is operable to receive the first type of electromagnetic radiation from the feed and to convert the first type of electromagnetic radiation into a second type of electromagnetic radiation and then back to the first type of electromagnetic radiation with a second radiation property for radiation from the metasurface structure assembly. The first radiation property and the second radiation property are different.

Antenna and metasurface structure for antenna

The present invention relates to a novel lens antenna with a 3D near-field focus-steering capability that operates at gigahertz and terahertz frequencies. The novel antenna includes a pair of discrete dielectric lenses fed by a stationary horn source. In-plane synchronous counter-rotation and co-rotation of the lens pair steers its near-field focus radially and azimuthally, respectively, while linear translation of the upper lens moves the focal point longitudinally. The steering focus beam enables fast imaging. In imaging applications, the radiated beam from the novel lens antenna focused in the target area can reduce undesired interference from neighboring structures and increase the system dynamic range and signal-to-noise ratio.

3-D focus-steering lens antenna

A leaky-wave antenna includes a substrate extending along an axis, and a dielectric waveguide extending along the axis and arranged in the substrate. The dielectric waveguide includes at least a top side, a bottom side, and opposite sides arranged between the top and bottom sides. A distance defined between the opposite sides varies along the axis for at least part of a length of the dielectric waveguide.

Growing community of inventors

Hong Kong, China

Ka Fai Chan