Antenna device

Patent metadata

Field	Value
Publication number	US-12308513-B2
Application number	US-202117910155-A
Country	US
Kind code	B2
Filing date	Feb 24, 2021
Priority date	Mar 13, 2020
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

An antenna device suppresses reflection of electromagnetic waves from a human body or other conductors, which causes the electromagnetic waves to be sufficiently emitted in a target direction. The antenna device includes an antenna pattern and a metasurface layer. The metasurface layer is a layer that is layered on the antenna pattern and disposed on the human body side. The metasurface layer includes a first low-loss film and a second low-loss film. A first metasurface is formed on the first low-loss film. A second metasurface is formed on the second low-loss firm.

First claim

The invention claimed is:

1. An antenna device configured to be used in contact with or close to a human body or a conductor, the antenna device comprising:
an antenna; and
a metasurface layer that is layered on the antenna, disposed on a human body side, and includes a plurality of low-loss films and a plurality of metasurfaces formed on the plurality of low-loss films, wherein
the plurality of low-loss films includes a first-layer low-loss film and a second-layer low-loss film that are layered,
the plurality of metasurfaces includes a first-layer metasurface made of a plurality of first-layer electrodes formed on the first-layer low-loss film and a second-layer metasurface made of a plurality of second-layer electrodes formed on the second-layer low-loss film,
the plurality of first-layer electrodes is disposed to not at least partially overlap the plurality of second-layer electrodes in a planar view, and
the plurality of second-layer electrodes is disposed to not at least partially overlap the plurality of first-layer electrodes in the planar view.

2. The antenna device according to claim 1 , wherein the plurality of low-loss films has a thickness of 150 μm or less.

3. The antenna device according to claim 1 , wherein the plurality of metasurfaces has a fractal shape.

4. The antenna device according to claim 1 , wherein the each of the plurality of second-layer electrodes has a shape identical to a shape of each of the plurality of first-layer electrodes.

5. The antenna device according to claim 1 , wherein the plurality of metasurfaces are formed of a visible light transparent conductive film.

6. The antenna device according to claim 1 , wherein a first plurality of capacitance components are located between the plurality of first-layer electrodes and a ground.

7. The antenna device according to claim 6 , wherein a second plurality of capacitance components are located between the plurality of second-layer electrodes and the ground.

8. The antenna device according to claim 1 , wherein the first metasurface includes a first though-hole for each of the plurality of first-layer electrodes.

9. The antenna device according to claim 8 , wherein a first inductance component is formed using the first through-hole for each of the plurality of first-layer electrodes.

10. The antenna device according to claim 8 , wherein the second metasurface includes a second through-hole for each of the plurality of second-layer electrodes.

11. The antenna device according to claim 10 , wherein a second inductance component is formed using the second through-hole for each of the plurality of second-layer electrodes.

12. An antenna device configured to be used in contact with or close to a human body or a conductor, the antenna device comprising:
an antenna; and
a metasurface layer that is layered on the antenna, disposed on a human body side, and includes a plurality of low-loss films and a plurality of metasurfaces formed on the plurality of low-loss films, wherein
the plurality of low-loss films includes a first-layer low-loss film and a second-layer low-loss film that are layered,
the plurality of metasurfaces includes a first-layer metasurface made of a plurality of first-layer electrodes formed on the first-layer low-loss film and a second-layer metasurface made of a plurality of second-layer electrodes formed on the second-layer low-loss film,
the plurality of first-layer electrodes is disposed to at least partially overlap the plurality of second-layer electrodes in a planar view, and
the plurality of second-layer electrodes is disposed to at least partially overlap the plurality of first-layer electrodes in the planar view.

13. The antenna device according to claim 12 , wherein the first-layer low-loss film or the second-layer low-loss film has a thickness of 150 μm or less.

14. The antenna device according to claim 12 , wherein the plurality of metasurfaces has a fractal shape.

15. The antenna device according to claim 12 , wherein the plurality of metasurfaces are formed of a visible light transparent conductive film.

16. The antenna device according to claim 12 , wherein each of the plurality of second-layer electrodes has a shape identical to a shape of each of the plurality of first-layer electrodes.

17. An antenna device comprising:
an antenna; and
an antenna film layered on the antenna, wherein the antenna film includes
a first low-loss film,
a second low-loss film layered with the first low-loss film, and
a ground,

wherein a first conductor pattern is formed on an upper surface of the first low-loss film,
wherein a first through-hole extends from the first conductor pattern to the ground and configures an antenna feed,
wherein a second conductor pattern is formed on an upper surface of the second low-loss film, and
wherein the second conductor pattern is larger in area than the first conductor pattern.

18. The antenna device of claim 17 , wherein a plurality of second through-holes extends from the second conductor pattern to the ground.

19. The antenna device of claim 18 , wherein the plurality of second through-holes are disposed around the first conductor pattern.

20. A continuous monitoring glucose device incorporating the antenna device of claim 18 .

Assignees

• Nissha Co Ltd
• Inu Res & Business Foundation

Inventors

• Moon In Yeol
• Omote Ryomei
• Sakata Yoshihiro
• Kurosaki Toshifumi
• Morimoto Shohei
• Kahng Sungtek
• Lee Changhyeong
• Seo Yejune

Classifications

• H01Q15/008 Primary

  said selective devices having Sievenpipers' mushroom elements · CPC title

• H01Q1/40

  Radiating elements coated with or embedded in protective material · 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

• H01Q15/0093

  having a fractal shape · CPC title

• H01Q15/006

  Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces · CPC title