US 11,909,112 B2
Sideband-free space-time-coding metasurface antennas
Gengbo Wu, Hong Kong (HK); Junyan Dai, Nanjing (CN); and Chi Hou Chan, Hong Kong (HK)
Assigned to City University of Hong Kong, Hong Kong (HK)
Filed by City University of Hong Kong, Hong Kong (HK)
Filed on Jun. 24, 2022, as Appl. No. 17/848,424.
Prior Publication US 2023/0420861 A1, Dec. 28, 2023
Int. Cl. H01Q 15/00 (2006.01); H01Q 1/22 (2006.01)
CPC H01Q 15/0086 (2013.01) [H01Q 1/2283 (2013.01); H01Q 15/006 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A self-filtering, space-time coding, waveguide-driven metasurface antenna comprising:
at least first and second metal layers;
a first dielectric layer interposed between the first and second metal layers;
a plurality of metal vias formed in the first dielectric layer;
a substrate integrated waveguide (SIW) formed from the first and second metal layers and from the metal vias in the first dielectric layer;
a plurality of meta-atoms formed in the first metal layer, each meta-atom including a slot cooperating with two switching elements for switching a meta-atom between an on and off state, wherein each meta-atom behaves as a magnetic dipole antenna element that radiates electromagnetic waves into free space such that propagating guided waves inside the substrate integrated waveguide are converted and molded into arbitrary selected out-of-plane free-space waves in both a frequency domain and a momentum domain.