US 12,341,247 B2
Multi-port multi-functional meta-surface coplanar antenna system for beam steering control
Tapas Chakravarty, Kolkata (IN); Amartya Banerjee, Kolkata (IN); Arpan Pal, Kolkata (IN); and Rowdra Ghatak, Kolkata (IN)
Assigned to Tata Consultancy Services Limited, Mumbai (IN)
Filed by Tata Consultancy Services Limited, Mumbai (IN)
Filed on Jul. 3, 2023, as Appl. No. 18/346,545.
Claims priority of application No. 202221040497 (IN), filed on Jul. 14, 2022.
Prior Publication US 2024/0022003 A1, Jan. 18, 2024
Int. Cl. H01Q 3/24 (2006.01); H01Q 15/00 (2006.01); H01Q 3/26 (2006.01); H01Q 19/30 (2006.01)
CPC H01Q 15/0006 (2013.01) [H01Q 3/24 (2013.01); H01Q 3/2682 (2013.01); H01Q 19/30 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A multi-port multi-functional meta-surface coplanar antenna system comprising:
a set of coplanar antennas having a set of antenna ports positioned on a first side of a substrate and communicating with a Radio Frequency (RF) input to receive and transmit radio waves;
a set of Gradient Refractive Index Meta-surface (GRIM) disposed on the first side of the substrate at a pre-defined gap and at a pre-defined offset from the set of antennas along a direction of the radio waves, wherein the GRIM is configured to tilt the radio waves in a desired direction, wherein each GRIM comprises a set of metamaterial unit cells having a rectangular stub at center of each metamaterial unit cell;
a switched time-delay network (STDN) unit connected to the set of coplanar antennas and configured for phase shifting the radio waves wherein the STDN unit having one or more radio frequency cables and two or more Single Pole Double Throw (SPDT) switches; and
a controller unit in communication with the STDN unit wherein the controller unit comprises:
one or more data storage devices configured to store instructions;
one or more communication interfaces (and
one or more hardware processors operatively coupled to the one or more data storage devices via the one or more communication interfaces, wherein the one or more hardware processors are configured to be operated by the instructions to:
obtain a pre-defined excitation matrix such that the pre-defined excitation matrix programs phase gradient values of radio waves using the STDN unit for beam steering control by exciting one or more antenna ports amongst the set of antenna ports, wherein the beam steering control is one or more of (i) steering of beams of the radio waves (ii) obtaining a set of beam patterns of the radio waves and (iii) controlling beam-width of the radio waves, wherein the excitation matrix is for 2-port, 4-port and 8-port integrated coplanar antenna, wherein in the 2-port integrated coplanar antenna, a phase gradient value ranges from 0 to 260, in the 4-port integrated coplanar antenna, the phase gradient value is 0 or 180.