Title:
MILLIMETER-WAVE EMISSION DEVICE AND MILLIMETER-WAVE TRANSMISSION AND RECEPTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/153904
Kind Code:
A1
Abstract:
This millimeter-wave emission device comprises a transmission body that is configured to transmit millimeter waves, a first cylinder member that surrounds a first hollow space extending along a central axis, and a second cylinder member that comprises an end surface that intersects with the central axis and has an opening provided therein. The second cylinder member surrounds a second hollow space that is connected to the opening and extends along the central axis from the end surface away from the first hollow space. The first hollow space and the second hollow space are configured to propagate transmitted millimeter waves. The area of a cross section of the second hollow space that is at a right angle to the central axis is smaller than the area of a cross section of the first hollow space that is at a right angle to the central axis. The first cylinder member has an inner circumferential surface having an area surrounding the first hollow space so as to face the central axis. That area of the inner circumferential surface of the first cylinder member is configured to absorb millimeter waves. The inner circumferential surface of the second cylinder member that surrounds the second hollow space and the end surface are configured to absorb millimeter waves.
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Inventors:
OOWAKI HIROHIKO
MAEDA MASAHIRO
OKUZONO EIJI
MAEDA MASAHIRO
OKUZONO EIJI
Application Number:
PCT/JP2022/000128
Publication Date:
July 21, 2022
Filing Date:
January 05, 2022
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G01N22/00; G01S7/03; G01S13/88; G01S13/931
Foreign References:
| JP2018093476A | 2018-06-14 | |||
| JP2020150436A | 2020-09-17 | |||
| JP2005318038A | 2005-11-10 | |||
| JPS6376602A | 1988-04-06 | |||
| US4604627A | 1986-08-05 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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