CN-116075984-B - Reflection unit and wireless transmission system

Abstract

The disclosed reflection unit is a reflection unit provided in a wireless transmission path for changing the direction of the wireless transmission path between at least a first wireless device that transmits a wireless communication signal and at least a second wireless device that receives the wireless communication signal, and is provided with a plurality of reflectors for reflecting the wireless communication signal, the plurality of reflectors having at least one or more reflection array reflectors.

Inventors

• Kyoguti Masami
• Yan Qixue

Assignees

• 住友电气工业株式会社

Dates

Publication Date

20260512

Application Date

20210924

Priority Date

20201028

Claims (20)

1. 1. A reflection unit provided in a wireless transmission path between at least a first wireless device transmitting a wireless communication signal and at least a second wireless device receiving the wireless communication signal in order to change a direction of the wireless transmission path, wherein, The reflection unit is provided with a plurality of reflectors for reflecting the wireless communication signal, The plurality of reflectors has a plurality of reflective array reflectors, The plurality of reflective array reflectors includes a first reflective array reflector and a second reflective array reflector, The first reflection array reflector is configured to reflect a second reflection wave of a second wireless communication signal transmitted from the second wireless device based on the second reflection array reflector, The second reflection array reflector is configured to reflect a first reflection wave of a first wireless communication signal transmitted from the first wireless machine based on the first reflection array reflector, The first reflective array reflector includes: a first concentrated reflection part configured to concentrate the first reflected wave at a focus, and A first non-concentrated reflection unit configured to cause the first reflected wave to be non-concentrated, The second reflective array reflector includes: a second concentrating reflection part configured to concentrate the second reflected wave at a focus, and And a second non-concentrated reflection unit configured to not concentrate the second reflected wave.
2. 2. The reflection unit according to claim 1, wherein, The reflection unit can be mounted to a structure having a corner where the first face and the second face meet, The first reflective array reflector is mounted to the first face, and the second reflective array reflector is mounted to the second face.
3. 3. The reflection unit according to claim 1, wherein, The plurality of reflectarray reflectors has at least one or more non-diffuse reflectarray reflectors configured to non-diffuse reflect the wireless communication signal.
4. 4. The reflection unit according to claim 1, wherein, The plurality of reflective array reflectors have: at least one or more diffuse reflection array reflectors configured to diffuse reflect the wireless communication signal, and At least one or more non-diffuse reflective array reflectors configured to non-diffuse reflect the wireless communication signal.
5. 5. The reflection unit according to claim 3 or 4, wherein, The at least one or more non-diffuse reflective array reflectors have at least one concentrated reflective array reflector configured to concentrate reflected waves of the wireless communication signal at a focal point.
6. 6. The reflection unit according to claim 5, wherein, The reflection unit is capable of being mounted to a structure having a first portion and a second portion that is easier to transmit the wireless communication signal than the first portion, The concentrated reflective array reflector is mounted to the structure in such a way that the reflected wave passes through the second portion.
7. 7. The reflection unit according to claim 5, wherein, The concentrated reflection array reflector is configured such that the focal point is present at a position avoiding an obstacle present in the wireless transmission path.
8. 8. The reflection unit according to claim 5, wherein, The plurality of reflectors have other reflectors that further reflect the reflected waves of the concentrated reflective array reflector, The other reflectors are smaller than the concentrated reflective array reflector.
9. 9. The reflection unit according to claim 1, wherein, The first and second reflective array reflectors are any one of diffuse reflective array reflectors, concentrated reflective array reflectors, and non-diffuse and non-concentrated reflective array reflectors, The second reflective array reflector is any one of the diffuse reflective array reflector, the concentrated reflective array reflector, and the non-diffuse and non-concentrated reflective array reflector, The diffuse reflection array reflector is a reflection array reflector configured to diffuse reflect the wireless communication signal, The concentrated reflection array reflector is a reflection array reflector configured to concentrate a reflected wave of the wireless communication signal at a focal point, The non-dispersive and non-concentrated reflection array reflector is a reflection array reflector configured not to diffusely reflect the radio communication signal and not to concentrate a reflected wave of the radio communication signal at a focal point.
10. 10. The reflection unit according to claim 1, wherein, The reflection unit can be mounted to a structure having a setting surface, The second reflection array reflector is configured to radiate the second reflected wave in a range including a direction orthogonal to the installation surface.
11. 11. The reflection unit according to claim 1, wherein, The reflection unit further includes a radio wave absorber.
12. 12. The reflection unit according to claim 1, wherein, The plurality of reflective array reflectors further has a plurality of focal reflective array reflectors, The plurality of focus reflection array reflectors are configured such that a first focus on a first radiation surface included in a radiation range of a reflected wave of the wireless communication signal and a second focus on a second radiation surface orthogonal to the first radiation surface are present at different positions.
13. 13. The reflection unit according to claim 1, wherein, The first concentrated reflecting portions and the second concentrated reflecting portions are each constituted by a reflecting array including a plurality of reflecting elements.
14. 14. The reflection unit according to claim 1 or 13, wherein, The first non-concentrated reflecting portion is configured to reflect the second reflected wave based on the second concentrated reflecting portion, The second non-concentrated reflection section is configured to reflect the first reflected wave based on the first concentrated reflection section.
15. 15. The reflection unit according to claim 1, wherein, The first reflective array reflector includes a first low reflection region around the first non-concentrated reflective portion, The first low reflection region has a lower reflectance than that of the second reflected wave based on the first non-concentrated reflection section, The second reflective array reflector includes a second low reflection region around the second non-concentrated reflective portion, The second low reflection region has a lower reflectance than that of the first reflected wave based on the second non-concentrated reflection section.
16. 16. The reflection unit of claim 15, wherein, The first low reflection region and the second low reflection region each include an electric wave absorber.
17. 17. The reflection unit according to claim 1, wherein, The first concentrated reflecting portion is formed in a ring shape, The first non-concentrated reflecting portion is disposed inside the first concentrated reflecting portion, The second concentrated reflecting portion is formed in a ring shape, The second non-concentrated reflecting portion is disposed inside the second concentrated reflecting portion.
18. 18. The reflection unit according to claim 1, wherein, The reflection unit can be mounted to a structure having a corner where the first face and the second face meet, The first reflective array reflector is mounted to the first face, The second reflective array reflector is mounted to the second face, The first non-concentrated reflecting portion is disposed closer to the second surface than the first concentrated reflecting portion or farther from the second surface than the first concentrated reflecting portion, The second non-concentrated reflecting portion is disposed closer to the first surface than the second concentrated reflecting portion or farther from the first surface than the second concentrated reflecting portion.
19. 19. The reflection unit according to claim 1, wherein, The first non-concentrated reflection part is configured to diffuse the first reflected wave or configured to not diffuse and concentrate the first reflected wave, The second non-concentrated reflection section is configured to diffuse the second reflected wave or configured to not diffuse and concentrate the second reflected wave.
20. 20. The reflection unit of claim 19, wherein, The first non-concentrated reflective portions and the second non-concentrated reflective portions are each constituted by a reflective array including a plurality of reflective elements.

Description

Reflection unit and wireless transmission system Technical Field The present disclosure relates to a reflection unit and a wireless transmission system. The present application claims priority based on japanese patent nos. 2020-18047, filed on 28 th month 10 in 2020, and the entire contents of the japanese patent application are incorporated by reference. Background Patent document 1 discloses a radio wave reflecting plate used in an area information communication system including a master transceiver and a slave transceiver. The radio wave reflecting plate of patent document 1 has a convex curved surface or a concave curved surface, and is attached to a ceiling portion in a region. Patent document 2 discloses a method of designing a reflection array. The reflective array is configured such that a plurality of reflective elements are arranged side by side on the substrate. The reflection array reflects an incident radio wave in a desired direction. Patent document 3 discloses a curved mirror antenna. The mirror antenna of patent document 3 includes a primary radiation portion, a sub-mirror, and a main mirror. The sub-reflecting mirror has a curved surface that converts the parallel light rays emitted from the primary radiation portion into bundled light rays and reflects the bundled light rays. The main mirror has a curved surface that converts the diffused light beam, which is formed by diffusing the bundled light beam based on the sub-mirror by passing through the bundling position, into parallel light beam and reflects the parallel light beam. Patent document 3 discloses that the sub-mirror and the main mirror may be constituted by a reflection array. Patent document 4 also discloses an antenna device including a primary radiation portion and a reflection array. Patent document 5 discloses a millimeter wave transmitting and receiving system using a metal reflecting plate. Patent document 6 discloses a millimeter wave communication system capable of simply adjusting the initial direction of a metal reflecting plate disposed on a transmission path of a signal in the millimeter wave band. Patent document 7 discloses a 90 ° bend for millimeter waves, which is used in a system for transmitting millimeter waves output from a gyrotron in an electron cyclotron resonance heating device. The millimeter wave of patent document 7 changes the transmission direction of the millimeter wave by two reflection plates with a 90 ° bend. Patent document 8 discloses a reflection array capable of reflecting a first bias wave having an electric field component parallel to the surface of a substrate and a second bias wave having an electric field component perpendicular to the surface of the substrate in a desired direction. Non-patent document 1 discloses a design of a radiation scattering shared reflection array antenna. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 6-200584 Patent document 2 Japanese patent application laid-open No. 2015-046821 Patent document 3 Japanese patent application laid-open No. 2012-182783 Patent document 4 Japanese patent application laid-open No. 2014-082639 Patent document 5 Japanese patent laid-open No. 2010-118845 Patent document 6 Japanese patent laid-open publication No. 2005-244362 Patent document 7 Japanese patent laid-open No. 6-053701 Patent document 8 Japanese patent application laid-open No. 2014-072818 Non-patent literature Non-patent document 1, tsukamurella Tian Longping, other 2, basic research on design of radiation scattering shared reflection array antenna, transmission of data from the institute of Electrical and communications, university of North Japan, vol.2016, no.581, pp.2-3, transmission of the institute of Electrical and communications, institute of Japan, month 6 of 2016 Disclosure of Invention One aspect of the present disclosure is a reflection unit. The disclosed reflection unit is a reflection unit provided in a wireless transmission path for changing the direction of the wireless transmission path between at least a first wireless device that transmits a wireless communication signal and at least a second wireless device that receives the wireless communication signal, and is provided with a plurality of reflectors for reflecting the wireless communication signal, the plurality of reflectors having at least one or more reflection array reflectors. The disclosed reflection means is provided in a wireless transmission path between at least a first wireless device that transmits a wireless communication signal and at least a second wireless device that receives the wireless communication signal, and is provided with at least one concentrated reflection array reflector configured such that reflected waves of the wireless communication signal are concentrated at a focal point. Another aspect disclosed is a wireless transmission system. The disclosed wireless transmission system is provided with a first wireless device that transmit