Electromagnetic wave reflecting device and electromagnetic wave reflecting fence

Patent metadata

Field	Value
Publication number	US-2025062541-A1
Application number	US-202418936242-A
Country	US
Kind code	A1
Filing date	Nov 4, 2024
Priority date	May 9, 2022
Publication date	Feb 20, 2025
Grant date	—

Abstract

The electromagnetic wave reflecting device includes: a reflection panel that reflects a radio wave of a desired band selected from a frequency band between 1 GHz and 170 GHz; and a frame that holds the reflection panel. The frame has a conductive portion. The reflection panel is held by the frame so that an edge of the reflection panel is not exposed to an outside of the frame. At least a part of the conductive portion of the frame is covered with a non-conductive protecting member or protective coating.

First claim

1 . An electromagnetic wave reflecting device, comprising:
a reflection panel that reflects a radio wave of a desired band selected from a frequency band between 1 GHZ and 170 GHz; and a frame that holds the reflection panel, wherein the frame has a conductive portion, the reflection panel is held by the frame so that an edge of the reflection panel is not exposed to an outside of the frame, and at least a part of the conductive portion of the frame is covered with a non-conductive protecting member or protective coating.

2 . The electromagnetic wave reflecting device according to claim 1 , wherein
a conductive facing surface that faces the edge in an inside of the frame is covered with the protecting member or the protective coating.

3 . The electromagnetic wave reflecting device according to claim 1 , wherein
a conductive facing surface that faces the edge in an inside of the frame is not covered with the protecting member or the protective coating.

4 . The electromagnetic wave reflecting device according to claim 1 , wherein
the frame includes a conductive main body, a slit into which the reflection panel is inserted, and a cavity communicating with the slit, and an outer surface of the main body and the slit are covered with the protective coating.

5 . The electromagnetic wave reflecting device according to claim 4 , wherein
the reflection panel is held in the slit in a state in which the edge of the reflection panel is in contact or not in contact with a base surface of the cavity.

6 . The electromagnetic wave reflecting device according to claim 5 , wherein
the main body has a hollow that is separated from the slit and the cavity.

7 . The electromagnetic wave reflecting device according to claim 1 , wherein
the frame includes a conductive main body, a slit into which the reflection panel is inserted, a cavity communicating with the slit, and a groove formed in the cavity, a base surface of the groove is a facing surface facing the edge, and an outer surface of the main body and the slit are covered with the protective coating.

8 . The electromagnetic wave reflecting device according to claim 7 , wherein
the reflection panel is held by the slit in a state in which the edge is in contact or not in contact with the base surface of the groove.

9 . The electromagnetic wave reflecting device according to claim 8 , wherein
the main body has a hollow that is separated from the cavity and the groove.

10 . The electromagnetic wave reflecting device according to claim 1 , wherein
the frame includes a conductive main body and a non-conductive cover provided on an outer surface of the main body.

11 . The electromagnetic wave reflecting device according to claim 10 , wherein
a part of an outer surface and an inner wall of the main body are covered with the protective coating, and the non-conductive cover is bonded to the protective coating covering the outer surface of the main body.

12 . An electromagnetic wave reflecting fence being formed by joining a plurality of the electromagnetic wave reflecting devices of claim 1 in a width direction of the frame, wherein
each of two adjacent reflection panels is held by the frame in a state in which an edge of the reflection panel is in contact or not in contact with a facing surface facing the edge in an inside of the frame.

Assignees

• Agc Inc

Inventors

• Kambara kumiko

Classifications

• G02B26/0833

  the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD (G02B26/0825 takes precedence; micromechanical devices in general B81B) · CPC title

• H10F77/488

  Reflecting light-concentrating means, e.g. parabolic mirrors or concentrators using total internal reflection · CPC title

• H01Q19/104

  using a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas (periscopic fed Cassegrain antennas H01Q19/191; passive relays H04B7/145) · CPC title

• H01Q15/142 Primary

  using insulating material for supporting the reflecting surface · CPC title

• H05K9/00

  Screening of apparatus or components against electric or magnetic fields (devices for absorbing radiation from an antenna H01Q17/00) · CPC title