WO2017130879A1 - Corps réfléchissant et procédé de fabrication de corps réfléchissant - Google Patents

Corps réfléchissant et procédé de fabrication de corps réfléchissant Download PDF

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Publication number
WO2017130879A1
WO2017130879A1 PCT/JP2017/002054 JP2017002054W WO2017130879A1 WO 2017130879 A1 WO2017130879 A1 WO 2017130879A1 JP 2017002054 W JP2017002054 W JP 2017002054W WO 2017130879 A1 WO2017130879 A1 WO 2017130879A1
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Prior art keywords
reflector
corner reflector
cover
corner
cover means
Prior art date
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PCT/JP2017/002054
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English (en)
Japanese (ja)
Inventor
村田　稔
Original Assignee
日本電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Priority to DE112017000547.7T priority Critical patent/DE112017000547T5/de
Priority to JP2017564226A priority patent/JPWO2017130879A1/ja
Publication of WO2017130879A1 publication Critical patent/WO2017130879A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/18—Reflecting surfaces; Equivalent structures comprising plurality of mutually inclined plane surfaces, e.g. corner reflector

Definitions

  • the present invention relates to a reflector that reflects electromagnetic waves and a method of manufacturing the reflector.
  • grasping the state of infrastructure equipment such as buildings, bridges, and roads is important in preventing accidents such as equipment collapse.
  • equipment such as buildings, bridges, and roads
  • a visual inspection to visually grasp the state of the equipment a hammering inspection to grasp the state of the equipment based on a difference in sound
  • an inspection to grasp the state of the equipment by the attached sensor etc.
  • there is a problem that these inspections require labor and cost.
  • There is also a method for grasping the state of equipment by analyzing the data of reflected waves received by an artificial satellite that radiates electromagnetic waves. In this method, when an electromagnetic wave is not reflected in the direction of the artificial satellite, a reflector called a corner reflector is installed. Then, electromagnetic waves are reflected in the direction of the artificial satellite by the corner reflector.
  • a corner reflector in which three conductors formed in a plate (planar) shape are arranged at right angles to each other reflects electromagnetic waves incident on the inside thereof in the incident direction.
  • the corner reflector is installed so that the boresight of the corner reflector faces the incident direction of the electromagnetic wave in order to increase the strength of reflection of the electromagnetic wave.
  • the bore sight is, for example, a direction connecting E and C (from E to C) in FIG. 1, and an angle formed with a line connecting E and G is about 55 °.
  • the bore reflector of the corner reflector is installed so that the incident direction (arrival direction) of the electromagnetic wave is directed, that is, the opening portion is directed slightly upward. .
  • corner reflectors the parts that contact each other; hereinafter referred to as “corners”. Then, foreign matter such as dust and rainwater collects on the inner surfaces of the corner reflectors (the parts that contact each other; hereinafter referred to as “corners”), and the corner reflectors expressed by the reflection direction and the strength of the reflection of the electromagnetic waves. The reflective performance will not be fully demonstrated.
  • Patent Document 1 describes a radio wave reflector in which an opening is covered with a protective film.
  • the reflection performance of the corner reflector deteriorates when the corner reflector is deformed by the influence of wind or the like in addition to the case where there is a foreign object at the corner of the corner reflector. This is because the flatness of each plate-like body forming the corner reflector is impaired, or the angle formed by each plate-like body changes.
  • the radio wave reflector described in Patent Document 1 is not intended for the above case. That is, the radio wave reflector described in Patent Document 1 cannot maintain the reflection performance because the reflection performance is deteriorated due to contamination with dust or water.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a reflector and a method for manufacturing the reflector that can prevent deterioration of reflection performance.
  • a reflector according to an aspect of the present invention is joined to a corner reflector formed by three reflectors arranged so as to be perpendicular to each other, and an end of the corner reflector, And a cover portion covering a space surrounded on three sides by the three reflecting plates.
  • a reflector according to an aspect of the present invention is joined to a corner reflector formed by a recess cut out so as to have three surfaces perpendicular to each other, and an end of the corner reflector, And a cover portion covering a space surrounded on three sides by the three surfaces.
  • a reflector is composed of three plates arranged at right angles to each other and a metal film formed on the surfaces of the three plates.
  • a reflector includes a hexahedral cover portion and a metal film formed on three surfaces provided at right angles to each other in the cover portion. And a corner reflector.
  • a method of manufacturing a reflector according to an aspect of the present invention includes three reflectors joined at right angles to form a corner reflector.
  • the cover portion is joined to the end portion of the corner reflector so as to cover the space surrounded by the corner.
  • a method of manufacturing a reflector according to an aspect of the present invention includes forming a corner reflector by removing a part of a hexahedral conductor so as to have three surfaces that are perpendicular to each other. A cover portion is joined to an end portion of the corner reflector so as to cover a space surrounded on three sides by three surfaces.
  • a method of manufacturing a reflector according to an aspect of the present invention joins three plates at right angles to each other, and surrounds the three sides of the three plates by the three plates.
  • a metal film is formed on the surface of the space to form a corner reflector, and a cover portion is joined to an end portion of the corner reflector so as to cover the space.
  • a metal film is formed on three surfaces of the hexahedron-shaped cover portion provided at right angles to each other.
  • FIG. 1 is a perspective view showing a configuration example of a reflector 100 in the present embodiment.
  • the reflector 100 according to the present embodiment includes a corner reflector 110 and a cover part 120.
  • the reflector 100 is formed by forming the corner reflector 110 on surfaces of the cover portion 120 having a cubic shape that are perpendicular to each other.
  • the cover portion 120 is a hexahedron formed so that the surface AEHD 121, the surface EFGH 122, and the surface ABFE 123 are perpendicular to each other.
  • the cover 120 may be another polyhedron as long as the surfaces are formed at right angles to each other.
  • a metal film 111 is formed on the surface AEHD 121 of the cover part 120.
  • a metal film 112 is formed on the surface EFGH 122 of the cover part 120.
  • a metal film 113 is formed on the surface ABFE 123 of the cover part 120.
  • each of the metal films 111 to 113 is formed of a metal such as copper or aluminum, for example.
  • the cover 120 is made of a material having a small refractive index, such as foamed polystyrene.
  • the cover part 120 is formed of a material having a refractive index in the microwave band of 1.0 or more and 1.1 or less, for example.
  • the cover 120 has a cubic shape, but may have another shape such as a rectangular parallelepiped shape.
  • the corner reflector 110 is formed by the metal films 111 to 113 of the surface AEHD 121, the surface EFGH 122, and the surface ABFE 123 that are perpendicular to each other in the cover portion 120.
  • Each of the metal films 111 to 113 is formed of a metal such as copper or aluminum as described above.
  • the cover part 120 since the cover part 120 has a cubic shape, each of the metal films 111 to 113 is formed in a square shape having the same size.
  • the metal films 111 to 113 are joined to each other so as to be perpendicular to each other. Therefore, in the corner reflector 110, the trihedral angle e is formed by the metal films 111 to 113.
  • the cover portion 120 is disposed on the inner surface side of the corner reflector 110, which is a region surrounded on three sides by the metal films 111 to 113 in the corner reflector 110.
  • the electromagnetic wave incident on the inner surface is reflected a plurality of times by the metal films 111 to 113 and emitted in the incident direction.
  • ⁇ represents the strength of reflection of electromagnetic waves.
  • ⁇ represents the circumference ratio.
  • a represents the length of one side of the square-shaped metal films 111 to 113.
  • ⁇ represents the wavelength of the electromagnetic wave. Accordingly, the reflection intensity ⁇ of electromagnetic waves greatly depends on the length a of one side of the square-shaped metal films 111 to 113.
  • the reflector 100 is formed by a cubic cover portion 120 and the metal films 111 to 113 on the surface AEHD 121, the surface EFGH 122, and the surface ABFE 123 in the cover portion.
  • the metal films 111 to 113 may be formed by spraying a metal such as copper or aluminum on the surface AEHD121, the surface EFGH122, and the surface ABFE123 of the cover portion 120 with a spray or attaching a foil made of a metal such as copper or aluminum. It is formed by evaporating a metal such as copper or aluminum.
  • the reflector 100 includes, for example, the metal films 111 to 113 (corner reflector 110) on the surface AEHD121, the surface EFGH122, and the surface ABFE123 provided so as to be perpendicular to each other in the cubic cover portion 120.
  • the cover portion 120 is formed. Therefore, the inner surface side of the corner reflector 110 is filled with the cover portion 120. Therefore, foreign matters such as dust and rainwater can be prevented from collecting on the inner surface side including the trihedral angle e in the corner reflector 110.
  • the cover part 120 also functions as a windbreak for the corner reflector 110. Therefore, it is possible to favorably suppress the corner reflector 110 from being deformed by the influence of wind.
  • FIG. 2 is an exploded perspective view showing a configuration example of the reflector 200 in the present embodiment.
  • the reflector 200 includes a corner reflector 210 and a cover portion 220.
  • the reflector 200 is a cubic reflector formed by joining a corner reflector 210 and a cover part 220 to each other.
  • FIG. 3 is a perspective view showing a configuration example of the corner reflector 210.
  • the corner reflector 210 includes a reflecting plate 211, a reflecting plate 212, and a reflecting plate 213.
  • a planar surface AEHD 211a is formed on the reflecting plate 211.
  • a planar surface EFGH 212 a is formed on the reflection plate 212.
  • a planar surface ABFE 213a is formed on the reflecting plate 213.
  • the reflecting plate 211, the reflecting plate 212, and the reflecting plate 213 are joined to each other so that the surface AEHD 211a, the surface EFGH 212a, and the surface ABFE 213a are perpendicular to each other.
  • Each of the reflection plates 211 to 213 is formed of a conductor such as metal (copper, aluminum, etc.), for example.
  • the reflecting plates 211 to 213 are plate-like bodies formed such that the surfaces AEHD 211a, the surface EFGH 212a, and the surface ABFE 213a are squares of the same size, but may have other shapes.
  • the corner reflector 210 is formed by joining the reflecting plates 211 to 213 so that the surfaces AEHD 211a, EFGH 212a, and ABFE 213a are perpendicular to each other. Therefore, as shown in FIG.
  • the corner reflector 210 has a trihedral angle e formed by the surface AEHD 211a, the surface EFGH 212a, and the surface ABFE 213a.
  • the electromagnetic wave incident on the inner surface side is reflected a plurality of times by the reflectors 211 to 213 and emitted in the incident direction.
  • FIG. 4 is a perspective view illustrating a configuration example of the cover unit 220.
  • the cover unit 220 includes a cover plate 221, a cover plate 222, and a cover plate 223.
  • a flat surface BFGC 221a is formed on the cover plate 221 so as to face the surface AEHD 211a.
  • a flat surface ABCD 222a is formed on the cover plate 222 so as to face the surface EFGH 212a.
  • a flat surface DCGH 223a is formed on the cover plate 223 so as to face the surface ABFE 213a.
  • each of the cover plates 221 to 223 is formed of acrylic or the like having a low refractive index.
  • each of the cover plates 221 to 223 is formed of a material having a refractive index in the microwave band of 1.0 or more and 1.1 or less, for example.
  • the cover plates 221 to 223 are plate-like bodies formed so that the surface BFGC 221a, the surface ABCD 222a, and the surface DCGH 223a are squares of the same size, but may have other shapes.
  • the cover portion 220 is joined to each other so that the surfaces BFGC 221a, the surface ABCD 222a, and the surface DCGH 223a are perpendicular to each other. That is, as shown in FIG. 4, the cover part 220 has a shape having a trihedral angle c formed by the surface BFGC 221a, the surface ABCD 222a, and the surface DCGH 223a.
  • the size of each surface of the cover plates 221 to 223 is configured in the same manner as the size of each surface of the reflection plates 211 to 213.
  • the corners are formed such that the cover plate 221 faces the reflection plate 211, the cover plate 222 faces the reflection plate 212, the cover plate 223 faces the reflection plate 213, and the reflector 200 is formed of a hollow cube. At least a part of corresponding positions of the reflector 210 and the cover part 220 are joined. Therefore, the cover part 220 is configured such that each of the trihedral angle e of the corner reflector 210 and the trihedral angle c of the cover part 220 constitutes a pair of opposite corners of the corners of the cubic reflector 200. 210 is joined. Therefore, the space surrounded on three sides by the three reflecting plates 211 to 213 constituting the corner reflector 210 is covered with the cover plates 221 to 223 of the cover portion 220 in the other direction.
  • the reflector 200 is manufactured through the following three processes, for example.
  • the first step is a step of forming the corner reflector 210 by joining the surfaces AEHD 211a, the surface EFGH 212a, and the surface ABFE 213a of the reflectors 211 to 213 so as to make a right angle to each other.
  • the second step is a step of forming the cover part 220 by joining the surfaces BFGC 221a, the surface ABCD 222a, and the surface DCGH 223a of the cover plates 221 to 223 so as to make a right angle to each other.
  • the third step is a step of joining the corner reflector 210 and the cover part 220 so that the reflector 200 is formed of a hollow cube.
  • the reflector 200 is formed, for example, by joining the corner reflector 210 and the cover part 220 to each other. Therefore, the inner surface side of the corner reflector 210 including the trihedral angle e is covered by the cover portion 220. Therefore, foreign matter such as dust and rainwater can be prevented from accumulating on the inner surface side including the trihedral angle e in the corner reflector 210.
  • the cover part 220 also functions as a windbreak for the corner reflector 210. Therefore, the corner reflector 210 is well suppressed from being deformed or distorted by the influence of wind. That is, the cover portion 220 has a deterioration in flatness of the surfaces AEHD 211a, EFGH 212a, and surface ABFE 213a in the reflectors 211 to 213 forming the corner reflector 210, and an angle formed by the reflectors 211 to 213 joined to each other. Can be prevented well.
  • the cover portion 220 in the present embodiment is configured to include a plate-like cover plate 221, a cover plate 222, and a cover plate 223 having a square surface of the same size, but is not limited thereto.
  • the cover part may be configured to include a plurality of plate-like bodies having a triangular surface.
  • FIG. 5 is a perspective view showing a configuration example of such a cover portion 220b. In the example shown in FIG. 5, a portion corresponding to the portion including the trihedral angle c of the cover portion 220 is removed in a triangular pyramid shape to form a triangular surface BDG.
  • the cover part may have a shape in which a part including the trihedral angle c of the cover part 220 is removed to form a curved surface.
  • FIG. 6 is a perspective view showing a configuration example of such a cover portion 220c.
  • the cover portion may include a plate-like body having a dome-shaped surface with the trihedral angle e as the center.
  • FIG. 7 is a perspective view showing a configuration example of such a cover portion 220d.
  • the reflectors 211 to 213 in the corner reflector 210 may not be joined to each other.
  • Such a corner reflector 210 does not have a trihedral angle, and foreign matters such as dust and rainwater are discharged from between the plates, so that foreign matters such as dust and rainwater do not accumulate in the corners. Therefore, the cover part 220 does not need to be included in the reflector 200 installed in a place where there is no influence of wind or the like.
  • FIG. 9 is a perspective view showing a configuration example of the reflector 300 in the present embodiment. As shown in FIG. 9, the reflector 300 includes a corner reflector 310 and a cover part 320.
  • the reflector 300 is different from the reflector 200 in the second embodiment in the following two points.
  • the first point is that the corner reflector 310 includes reflectors 311 to 313 as shown in FIG.
  • the reflecting plate 311 is formed with a surface ABD 311a having a right isosceles triangle shape with the inner angle at the vertex A as the apex angle.
  • a surface ABC 312 a having a right isosceles triangle shape with an inner angle at the vertex A as an apex angle is formed.
  • the reflecting plate 313 is formed with a plane ACD 313a having a right isosceles triangular shape with the inner angle at the vertex A as the apex angle.
  • the reflecting plates 311 to 313 are plate-like bodies formed so that the surfaces ABD 311a, the surface ABC 312a, and the surface ACD 313a are in the shape of a right isosceles triangle having the same size.
  • the corner reflector 310 is formed so that the equilateral sides of each surface are joined to each other so that the surfaces ABD311a, the surface ABC312a, and the surface ACD313a form a right angle with each other and have a trihedral angle a. Therefore, as shown in FIG. 9, the corner reflector 310 has a triangular pyramid shape with the trihedral angle a as the apex and the bottom surface facing the trihedral angle a is open.
  • the second point is that the cover part 320 is formed by a cover plate 321 having a triangular surface BCD321a.
  • ⁇ 4 ⁇ a 4 / (3 ⁇ 2 ).
  • ⁇ represents the strength of reflection of electromagnetic waves.
  • ⁇ represents the circumference ratio.
  • a represents the lengths of the two sides of the equilateral sides of the surfaces ABC311a, surface ABD312a, and surface ACD313a of the right angled isosceles triangles in the reflectors 311 to 313.
  • ⁇ represents the wavelength of the electromagnetic wave.
  • the reflection intensity ⁇ of electromagnetic waves greatly depends on the length a of each side of the equilateral two sides of the surfaces ABD311a, the surface ABC312a, and the surface ACD313a of the right angled isosceles triangles in the reflectors 311 to 313.
  • the reflector 300 is manufactured through the following two processes, for example.
  • the first step is a step of forming the corner reflector 310 by joining equal sides of each surface such that each surface ABD 311a, surface ABC 312a and surface ACD 313a of the reflectors 311 to 313 are perpendicular to each other.
  • the second step is a step of joining the corner reflector 310 and the cover part 320 so that the reflector 300 is formed by a hollow triangular pyramid.
  • the cover part 320 is formed by the cover plate 321 having the triangular surface BCD321a, but is not limited thereto.
  • the cover portion may be configured to include a plurality of cover plates having a triangular surface.
  • FIG. 10 is a perspective view showing a configuration example of such a cover part 320b.
  • the cover portion 320 b is configured to include a cover plate 322, a cover plate 323, and a cover plate 324.
  • the cover plate 322 is formed with a surface IBC 322a having a right isosceles triangular shape with an inner angle at the vertex I as an apex angle.
  • the cover plate 323 is provided with a surface IDB 323a having a right isosceles triangle shape with an inner angle at the vertex I as an apex angle.
  • the cover plate 324 is formed with a surface IDC 324a having a right isosceles triangle shape with an inner angle at the vertex I as an apex angle. Note that the cover plates 322 to 324 are plate-like bodies formed so that the surface IBC 322a, the surface IDB 323a, and the surface IDC 324a have a right-angled isosceles triangle shape having the same size.
  • the cover portion 320b is formed so that the respective sides IBC 322a, the surface IDB 323a, and the surface IDC 324a are joined to each other so that the equal sides of the respective surfaces form a right angle and have a trihedral angle i. Therefore, as shown in FIG. 10, the cover part 320 b has a triangular pyramid shape with the trihedral angle i as the apex and the bottom surface facing the trihedral angle i is open.
  • the side BC in the cover part 320 is in contact with the side BC in the corner reflector 310
  • the side BD in the cover part 320b is in contact with the side BD in the corner reflector 310
  • the side CD in the cover part 320b is in contact with the side CD in the corner reflector 310
  • At least a part of the corresponding positions of the corner reflector 310 and the cover part 320b are joined so that the reflector 300 is formed of a hollow cube.
  • FIG. 11 is a perspective view showing a configuration example of the reflector 400 in the present embodiment. As shown in FIG. 11, the reflector 400 includes a corner reflector 410 and a cover portion 420.
  • the reflector 400 is different from the reflector 200 in the second embodiment in the following two points.
  • the first point is that the corner reflector 410 includes reflectors 411 to 413.
  • the reflection plate 411 is formed with a fan-shaped surface ABD 411 a including an arc BD centering on the center point A.
  • the reflection plate 412 is formed with a fan-shaped surface ABC412a including an arc BC centered on the center point A.
  • the reflection plate 413 is formed with a fan-shaped surface ACD 413 a including an arc CD centered on the center point A.
  • the reflection plates 411 to 413 are plate-like bodies formed so that the surfaces ABD 411a, the surface ABC 412a, and the surface ACD 413a have the same size as each other.
  • corner reflector 410 end portions having diameters connecting the center point A and the arcs are joined to each other so that the surfaces ABD411a, ABC412a, and ACD413a are perpendicular to each other.
  • the second point is that the cover 420 is formed by a cover plate 421 having a dome-shaped surface BCD421a.
  • the reflector 400 is manufactured through the following two processes, for example.
  • end portions forming diameters connecting the center point A and the respective arcs are joined to each other so that each surface ABD 411a, surface ABC 412a and surface ACD 413a of the projecting plates 411 to 413 are perpendicular to each other.
  • the second step includes an end including an arc-shaped peripheral edge and an end including a peripheral edge of the cover 420 on each surface of the corner reflector 410 so that the reflector 400 is formed by a part of a hollow sphere.
  • FIG. 12 is an exploded perspective view showing a configuration example of the reflector 500 in the present embodiment.
  • the reflector 500 includes a corner reflector 210 and a cover portion 520.
  • FIG. 13 is a perspective view illustrating a configuration example of the cover unit 520.
  • the corner reflector 210 is the corner reflector 210 in the second embodiment shown in FIG.
  • the reflector 500 is different from the reflector 200 in the second embodiment in the following two points.
  • the first point is that the cover portion 520 is a hexahedron formed so that the surface JNQM521, the surface NOPQ522, and the surface JKON523 are perpendicular to each other.
  • the cover portion 520 is formed of a material having a low refractive index, such as foamed polystyrene.
  • the cover portion 520 is formed of a material having a refractive index in the microwave band of 1.0 or more and 1.1 or less, for example.
  • the second point is that the surface JNQM521 in the cover portion 520 is on the surface AEHD211a in the corner reflector 210, the surface NOPQ522 in the cover portion 520 is on the surface EFGH212a in the corner reflector 210, and the surface JKON523 in the cover portion 520 is on the surface ABFE213a in the corner reflector 210.
  • the corner reflector 210 and the cover part 520 are joined to each other so as to come into contact with each other. That is, the cover portion 520 is disposed on the inner side of the corner reflector 210.
  • the reflector 500 is manufactured through the following two processes, for example.
  • the first step is a step of forming the corner reflector 210 by joining the surfaces AEHD 211a, the surface EFGH 212a, and the surface ABFE 213a of the reflectors 211 to 213 so as to make a right angle to each other.
  • the surface JNQM521 in the cover portion 520 is the surface AEHD211a in the corner reflector 210
  • the surface NOPQ522 in the cover portion 520 is the surface EFGH212a in the corner reflector 210
  • the surface JKON523 in the cover portion 520 is the surface ABFE213a in the corner reflector 210.
  • This is a step of joining the corner reflector 210 and the cover portion 520 so as to contact each other.
  • FIG. 14 is a perspective view showing a configuration example of the reflector 600 in the present embodiment.
  • the reflector 600 includes a corner reflector 610 and a cover part 220.
  • the cover part 220 is the cover part 220 in 2nd Embodiment shown in FIG.
  • the reflector 600 is different from the reflector 200 in the second embodiment in that the corner reflector 610 is a three-dimensional solid metal such as copper or aluminum having three square surfaces that are perpendicular to each other.
  • the three square surfaces perpendicular to each other are the surface AEHD611, the surface EFGH612, and the surface ABFE613 in FIG.
  • the corner reflector 610 is formed by a recess notched so as to have a surface AEHD 611, a surface EFGH 612, and a surface ABFE 613.
  • the reflector 600 is manufactured through the following three steps, for example.
  • the first step is a step of forming the corner reflector 610 by cutting out a portion including a corner in a hexahedral shape made of a metal such as copper or aluminum into a cubic shape.
  • the second step is a step of forming the cover part 220 by joining the surfaces BFGC 221a, the surface ABCD 222a, and the surface DCGH 223a of the cover plates 221 to 223 so as to make a right angle to each other.
  • the third step is a step of joining the corner reflector 610 and the cover part 220 so that the reflector 600 is formed of a hollow cube.
  • FIG. 15 is an exploded perspective view showing a configuration example of the reflector 700 in the present embodiment.
  • the reflector 700 in the present embodiment includes a corner reflector 710 and a cover portion 220.
  • the cover part 220 is the cover part 220 in 2nd Embodiment shown in FIG.
  • the reflector 700 is different from the reflector 200 in the second embodiment in that the corner reflector 710 includes a reflector 711, a reflector 712, and a reflector 713.
  • the reflection plate 711 is made of, for example, a metal film such as copper or aluminum formed on the planar surface AEHD 711a of an insulating plate such as acrylic.
  • the reflection plate 712 is made of, for example, a metal film such as copper or aluminum formed on the planar surface EFGH 712a of an insulating plate such as acrylic.
  • the reflection plate 713 is made of, for example, a metal film such as copper or aluminum formed on the planar surface ABFE 713a of an insulating plate such as acrylic.
  • the reflecting plates 711 to 713 are plate-like bodies formed so that each surface AEHD 711a, surface EFGH 712a, and surface ABFE 713a are squares having the same size.
  • the reflecting plate 711, the reflecting plate 712, and the reflecting plate 713 are joined so that the respective surfaces AEHD 711a, EFGH 712a, and surface ABFE 713a are perpendicular to each other.
  • the corner reflector 710 is formed by joining the surface AEHD 711a of the reflecting plate 711, the surface EFGH 712a of the reflecting plate 712, and the surface ABFE 713a of the reflecting plate 713 so as to face the inside of the corner reflector 710.
  • the reflector 700 is manufactured through the following three steps, for example.
  • a metal film made of copper, aluminum, or the like is formed on each surface AEHD 711a, surface EFGH 712a, and surface ABFE 713a of each plate of an insulator such as acrylic, and the reflection plate 711, the reflection plate 712, and the reflection
  • the metal film is formed by spraying a metal such as copper or aluminum by spraying, attaching a foil made of a metal such as copper or aluminum, or depositing a metal such as copper or aluminum.
  • the second step is a step of forming the corner reflector 710 by joining the surfaces AEHD 711a, the surface EFGH 712a, and the surface ABFE 713a of the reflectors 711 to 713 so as to make a right angle to each other.
  • the third step is a step of joining the corner reflector 710 and the cover portion 720 so that the reflector 700 is formed of a hollow cube.
  • the metal film is formed on the surface of the reflectors 711 to 713 that faces the inside of the corner reflector 710, but the present invention is not limited to this.
  • the metal film may be formed on the surface of the reflectors 711 to 713 that faces the outside of the corner reflector 710.
  • FIG. 16 is an exploded perspective view showing a configuration example of the reflector 800 in the present embodiment. As shown in FIG. 16, the reflector 800 includes a corner reflector 810 and a cover portion 820.
  • the corner reflector 810 and the cover part 820 are realized by, for example, the corner reflector 210 in the second embodiment of the present invention shown in FIG. 2 and the cover part 220 shown in FIG.
  • the corner reflector 810 is formed by three reflectors arranged so as to be perpendicular to each other.
  • the cover part 820 is joined to the corner reflector 810 and covers a space surrounded on three sides by three reflectors forming the corner reflector 810.
  • the reflector 800 is formed by joining the corner reflector 810 and the cover portion 820 to each other.
  • the cover unit 820 covers a space surrounded on three sides by the three reflectors that form the corner reflector 810. Therefore, foreign matters such as dust and rainwater can be prevented from accumulating on the inner surface side of the corner reflector 810.
  • the cover part 820 also functions as a windbreak for the corner reflector 810. Therefore, the corner reflector 810 can be satisfactorily suppressed from being deformed by the influence of wind.
  • the present embodiment can achieve the same effects as those of the first embodiment.
  • [Appendix 1] A corner reflector formed by three reflecting surfaces arranged at right angles to each other; A reflector comprising: cover means joined to an end of the corner reflector and covering a space surrounded on three sides by the three reflecting surfaces.
  • [Appendix 2] The reflector according to appendix 1, wherein the shape of the three reflecting surfaces is a square.
  • [Appendix 3] The shape of the said 3 reflective surfaces is a right-angled isosceles triangle, The reflector of Additional remark 1 characterized by the above-mentioned.
  • Appendix 4] The reflector according to claim 1, wherein the three reflecting surfaces have a fan shape.
  • Appendix 10 The reflector according to any one of appendices 1 to 9, wherein the three reflecting surfaces are made of copper.
  • Appendix 11 The reflector according to any one of appendices 1 to 9, wherein the three reflecting surfaces are made of aluminum.
  • Appendix 12 The reflector according to any one of appendices 1 to 11, wherein the cover means is made of foamed polystyrene.
  • Appendix 13 The reflector according to any one of appendices 1 to 11, wherein the cover means is formed of a material having a refractive index in a microwave band of 1.0 or more and 1.1 or less.
  • Appendix 14 The reflector according to appendix 13, wherein the cover means is made of acrylic.
  • [Appendix 15] A corner reflector formed by a recess cut out to have three surfaces perpendicular to each other; Cover means joined to the end of the corner reflector and covering a space surrounded on three sides by the three surfaces;
  • a reflector comprising: [Appendix 16] A corner reflector composed of three plates arranged at right angles to each other and a metal film formed on the surfaces of the three plates;
  • a reflector comprising: cover means which is joined to an end portion of the corner reflector and covers a space surrounded on three sides by the three plates.
  • the metal film is formed on the space-side surface of the three plates. Item 17.
  • [Appendix 20] A part of the hexahedral conductor is removed so as to have three surfaces perpendicular to each other to form a corner reflector, A method of manufacturing a reflector, wherein a cover means is joined to an end of the corner reflector so as to cover a space surrounded on three sides by the three surfaces.
  • [Appendix 21] Join the three plates at right angles to each other, A metal reflector is formed on the surface of the space that is surrounded on three sides by the three plates of the three plates to form a corner reflector, A manufacturing method of a reflector, wherein a cover means is joined to an end of the corner reflector so as to cover the space.
  • [Appendix 22] Forming a metal film on three surfaces of the hexahedron-shaped cover means provided at right angles to each other; A method for manufacturing a reflector.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

[Problème] L'objectif de la présente invention est de produire un corps réfléchissant et un procédé de fabrication d'un corps réfléchissant pouvant empêcher l'altération ou la détérioration de propriétés de réflexion d'ondes électromagnétiques. [Solution] Comme l'illustre la Fig. 16, un corps réfléchissant 800 est pourvu d'un réflecteur de coin 810 et d'une couverture 820. Le réflecteur de coin 810 est composé de trois panneaux réfléchissants qui sont agencés perpendiculairement l'un à l'autre. La couverture 820 est reliée au réflecteur de coin 810, et recouvre l'espace enfermé sur trois côtés par les trois panneaux réfléchissants constituant le réflecteur de coin 810.
PCT/JP2017/002054 2016-01-28 2017-01-23 Corps réfléchissant et procédé de fabrication de corps réfléchissant WO2017130879A1 (fr)

Priority Applications (2)

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DE112017000547.7T DE112017000547T5 (de) 2016-01-28 2017-01-23 Reflexionskörper und Verfahren zum Herstellen eines Reflexionskörpers
JP2017564226A JPWO2017130879A1 (ja) 2016-01-28 2017-01-23 反射体および反射体の製造方法

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JP2019078415A (ja) * 2017-10-20 2019-05-23 日本飛行機株式会社 水上標的およびコーナリフレクタ
JP2019124457A (ja) * 2019-03-19 2019-07-25 日本飛行機株式会社 水上標的およびコーナリフレクタ
CN112363128A (zh) * 2020-10-27 2021-02-12 中铁大桥科学研究院有限公司 一种雷达标靶装置

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EP3671958A1 (fr) * 2018-12-21 2020-06-24 Robert Bosch GmbH Réflecteur d'angle pour réfléchir des ondes électromagnétiques

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JP2019124457A (ja) * 2019-03-19 2019-07-25 日本飛行機株式会社 水上標的およびコーナリフレクタ
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CN112363128B (zh) * 2020-10-27 2023-08-01 中铁大桥科学研究院有限公司 一种雷达标靶装置

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