US 12,313,786 B2
Light detecting and ranging (LiDAR) devices and the like
Guo Qiang Patrick Lo, Singapore (SG); Bo Li, Singapore (SG); and Lian Xi Larry Lia, Singapore (SG)
Assigned to ADVANCED MICRO FOUNDRY PTE. LTD., Singapore (SG)
Appl. No. 17/414,999
Filed by ADVANCED MICRO FOUNDRY PTE. LTD., Singapore (SG)
PCT Filed Dec. 26, 2019, PCT No. PCT/SG2019/050639
§ 371(c)(1), (2) Date Jun. 17, 2021,
PCT Pub. No. WO2020/139196, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 10201811769X (SG), filed on Dec. 28, 2018.
Prior Publication US 2022/0065997 A1, Mar. 3, 2022
Int. Cl. G01S 7/481 (2006.01); G02F 1/025 (2006.01)
CPC G01S 7/4817 (2013.01) [G02F 1/025 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An antenna array controllable light beams, the antenna array comprising a plurality of linear antenna arrays (100), each linear antenna array comprising:
a plurality of antenna elements (104);
a waveguide (102) supporting the antenna elements having a length and a thickness;
a transverse phase shifter (200) located at an end of the waveguide; and
a control element (400, 402, 404), adjacent to the waveguide, arranged to induce a change in refractive index along at least a part of the length of the waveguide and in at least a part of the thickness of the waveguide, wherein the control elements define a longitudinal phase shifter extending along the length of the waveguide, wherein the control elements comprise a pair of doped regions (400, 402) located on either side of the waveguide and separated by the waveguide, wherein the change in refractive index in the waveguide causes a phase shift in light emitted via each of the plurality of antenna elements.