Antenna structure, and motion recognition sensor, radar sensor and display device including the same

Patent metadata

Field	Value
Publication number	US-2024213679-A1
Application number	US-202318391956-A
Country	US
Kind code	A1
Filing date	Dec 21, 2023
Priority date	Dec 23, 2022
Publication date	Jun 27, 2024
Grant date	—

Abstract

An antenna structure includes a plurality of first antenna units arranged along a first direction, and a second antenna unit disposed in a second direction perpendicular to the first direction with respect to one of the first antenna units. Each of the first antenna units includes a first radiator, a first transmission line connected to the first radiator, and a first sub-ground disposed around the first transmission line. The second antenna unit includes a second radiator and a second transmission line connected to the second radiator.

First claim

What is claimed is:

1 . An antenna structure comprising:
a plurality of first antenna units arranged along a first direction; and a second antenna unit disposed in a second direction perpendicular to the first direction with respect to one of the first antenna units, wherein each of the first antenna units comprises a first radiator, a first transmission line connected to the first radiator, and a first sub-ground disposed around the first transmission line, and the second antenna unit comprises a second radiator and a second transmission line connected to the second radiator.

2 . The antenna structure of claim 1 , wherein the first sub-ground extends to be parallel to the first transmission line.

3 . The antenna structure of claim 1 , wherein a ratio of a length of the first sub-ground to a length of the first transmission line is in a range from 0.50 to 0.99.

4 . The antenna structure of claim 1 , wherein the first sub-ground includes a pair of first sub-grounds with the first transmission line interposed therebetween.

5 . The antenna structure of claim 4 , wherein a ratio of a separation distance between outermost sides of the pair of first sub-grounds to a width of the first radiator is 1.2 or more.

6 . The antenna structure of claim 1 , wherein each of the first antenna units further comprises a first signal pad connected to one end of the first transmission line, and a first ground pad disposed around the first signal pad.

7 . The antenna structure of claim 6 , wherein the first sub-ground extends from the first ground pad toward the first radiator.

8 . The antenna structure of claim 7 , wherein the first sub-ground is physically connected to the first ground pad.

9 . The antenna structure of claim 7 , wherein a width of the first sub-ground is smaller than a width of the first ground pad.

10 . The antenna structure of claim 1 , wherein the second antenna unit further comprises a second sub-ground disposed around the second transmission line.

11 . The antenna structure of claim 1 , wherein the second antenna unit includes a plurality of second antenna units arranged along the second direction.

12 . The antenna structure of claim 1 , further comprising a third antenna unit arranged to be spaced apart from the plurality of first antenna units and the second antenna unit,
wherein the third antenna unit comprises a third radiator, a third transmission line connected to the third radiator, and a third sub-ground disposed around the third transmission line.

13 . The antenna structure of claim 12 , further comprising a dielectric layer on which the plurality of first antenna units, the second antenna unit and the third antenna unit are disposed, and
the plurality of first antenna units, the second antenna unit and the third antenna unit are disposed at the same level on the dielectric layer.

14 . The antenna structure of claim 13 , wherein the first direction and the second direction are each inclined by a predetermined angle with respect to a width direction of the dielectric layer.

15 . The antenna structure of claim 12 , wherein the plurality of first antenna units and the second antenna unit serve as a reception radiation unit, and the third antenna unit serves as a transmission radiation unit.

16 . A motion recognition sensor comprising the antenna structure of claim 1 .

17 . A radar sensor comprising the antenna structure of claim 1 .

18 . An image display device, comprising:
a display panel; and the antenna structure according to claim 1 disposed on the display panel.

19 . The image display device of claim 18 , further comprising:
a motion sensor driving circuit coupled to the antenna structure; and a flexible circuit board (FPCB) electrically connecting the antenna structure and the motion sensor driving circuit.

Assignees

• Dongwoo Fine Chem Co Ltd

Inventors

• Hong Sung Joon
• Sung Ki Hun
• Kwon Do Hyoung
• Huh Yoon Ho

Classifications

• G01S7/03

  Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver · CPC title

• G06F3/011

  Arrangements for interaction with the human body, e.g. for user immersion in virtual reality (blind teaching G09B21/00) · CPC title

• H01Q1/22

  by structural association with other equipment or articles · CPC title

• H01Q1/38

  formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface  H01Q15/142)} · CPC title

• H01Q21/061 Primary

  Two dimensional planar arrays · CPC title