Radio wave reflector for ships, ship equipped with same, and method for manufacturing radio wave reflector for ships

Abstract

To provide a radio wave reflector plate for a ship which reflects radio waves arriving from outside of a hull and furthermore is weight-saved and can ensure durability, a ship equipped with the same, and a method for manufacturing a radio wave reflector plate for a ship.SOLUTION: A radio wave reflector plate for a ship is provided, which is placed on a hull and reflects radio waves arriving from the outside of the ship, the radio wave reflector plate for a ship comprises: tabular core material made of polyvinyl chloride foam; and a pair of radio wave reflecting portions which are formed integrally with the core material in such a manner that the radio wave reflecting portions sandwich the core material in the thickness direction, wherein the radio wave reflecting portion includes a metal mesh layer formed by metal, and a first reinforcing layer formed of glass fiber-reinforced plastic and integrally formed with the metal mesh layer on the opposite side of the core material with respect to the metal mesh layer.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a radio wave reflector for a ship, a ship equipped with the same, and a method for manufacturing a radio wave reflector for a ship. [Background technology]

[0002] Merchant ships and small vessels can announce their own location by receiving radio waves from radars installed on other ships or land-based facilities, which are reflected back to the radar. This ensures safety on sea routes. However, ships with military or defense missions may be required to have stealth capabilities. In other words, it is necessary to prevent radio waves from hitting the hull or on-board equipment and scattering, resulting in the ship's position being detected by outside parties.

[0003] For example, Patent Document 1 discloses a radio wave absorber in which a radio wave shielding material that prevents incoming identification radio waves from passing to the opposite side is sandwiched between absorber main bodies formed by adding carbon to synthetic resin and processing it into a grating shape by molding.As a result, radio waves that enter the absorber main body are blocked by the radio wave shielding material sandwiched between the absorber main bodies, and do not escape to the opposite side of the radio wave shielding material. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-67766 Summary of the Invention [Problem to be solved by the invention]

[0005] When a ship navigates in waters where stealth is required, a radio wave reflector capable of reflecting radio waves in a direction different from the direction of their arrival may be installed on the ship's hull to minimize the risk of radio waves from hitting the equipment on the ship. In this case, the radio wave reflector must be lightweight to prevent a decrease in the ship's propulsion performance due to increased weight. However, because the radio wave reflector installed on the hull may be exposed to storms and other conditions while the ship is sailing, it must be lightweight and durable.

[0006] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a radio wave reflector for a ship that can reflect radio waves arriving from outside the hull while ensuring durability and reducing weight, a ship equipped with the same, and a method for manufacturing a radio wave reflector for a ship. [Means for solving the problem]

[0007] In order to solve the above problems, the radio wave reflector for a ship according to the present disclosure is a radio wave reflector for a ship that is placed on a hull and reflects radio waves arriving from outside the hull, and comprises a flat core material formed from a polyvinyl chloride foam, and a pair of radio wave reflecting portions formed integrally with the core material so as to sandwich the core material in the thickness direction, and the radio wave reflecting portions have a metal mesh layer formed from metal, and a first reinforcing layer formed from glass fiber reinforced plastic and integrally with the metal mesh layer on the opposite side of the core material with respect to the metal mesh layer.

[0008] A ship according to the present disclosure comprises the hull and the radio wave reflector for a ship.

[0009] The method for manufacturing a radio wave reflector for a ship according to the present disclosure is a method for manufacturing a radio wave reflector for a ship comprising a flat core material formed from a polyvinyl chloride foam and a pair of radio wave reflecting portions formed integrally with the core material so as to sandwich the core material in the plate thickness direction, and includes a lamination process of forming the radio wave reflecting portion by laminating a metal mesh layer formed from metal, a first reinforcing layer formed from glass fiber reinforced plastic, and a second reinforcing layer formed from glass fiber reinforced plastic on the core material in the order of the second reinforcing layer, the metal mesh layer, and the first reinforcing layer in a direction away from the core material; an impregnation process of supplying liquid synthetic resin between each layer in the radio wave reflecting portion and between the radio wave reflecting portion and the core material, thereby impregnating the core material and the radio wave reflecting portion with the synthetic resin; and a curing process of curing the synthetic resin to integrate the core material and the radio wave reflecting portion. [Effects of the Invention]

[0010] According to the present disclosure, it is possible to provide a radio wave reflector for a ship that can reflect radio waves arriving from outside the hull while ensuring durability and reducing weight, a ship equipped with the same, and a method for manufacturing a radio wave reflector for a ship. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view showing a schematic configuration of a ship according to an embodiment of the present disclosure. FIG. [Figure 2] 2 is a diagram showing the positional relationship between shipboard equipment and shipboard radio wave reflectors on the deck of a ship when viewed from the direction of line II-II in FIG. 1. FIG. [Figure 3] FIG. 2 is a diagram showing a layer structure of a radio wave reflector for a ship according to an embodiment of the present disclosure. [Figure 4] 1 is a flowchart illustrating a method for manufacturing a radio wave reflector for a ship according to an embodiment of the present disclosure. [Figure 5] FIG. 10 is a diagram illustrating the configuration of a ship according to another embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, with reference to the accompanying drawings, embodiments for carrying out a radio wave reflector for a ship, a ship equipped with the same, and a method for manufacturing a radio wave reflector for a ship according to the present disclosure will be described.

[0013] (Ship) A ship is a vessel whose mission is military or defense. In this embodiment, the ship is a patrol vessel that performs security and rescue operations in territorial waters, coastal areas, inland seas, inland waters, ports, etc. As shown in FIG. 1 , a ship 100 includes a hull 1, a superstructure 2, ship equipment 3, and a ship radio wave reflector 4.

[0014] (Hull) The hull 1 is shaped like a container that can carry various supplies, weapons, and personnel, and has a shape suitable for sailing on the sea surface. More specifically, the hull 1 has a bow section 11, a midship section 12, and a stern section 13. Hereinafter, the direction from the stern section 13 toward the bow section 11 may be referred to as the "direction of travel D" of the ship 100.

[0015] A bulbous bow 11a, which protrudes like a bulb, is provided at the tip of the bow 11 to reduce resistance from seawater encountered during navigation. A screw 13a and a rudder 13b are provided at the stern 13. The screw 13a is driven to rotate by a motor or the like provided inside the hull 1, thereby generating a propulsive force toward the rear in the traveling direction D. The rudder 13b is a plate-shaped member with a control surface, and can change the traveling direction D of the ship 100 by changing its attitude (angle). The midship 12 connects the bow 11 and the stern 13 in the traveling direction D.

[0016] The upward-facing surfaces of the bow section 11, the midship section 12, and the stern section 13 are designated as decks 1a. In this embodiment, deck 1a is an exposed deck. Ship equipment, deck machinery (not shown), and the like are arranged on deck 1a.

[0017] (superstructure) The superstructure 2 is provided on the deck 1a in the central part 12 of the hull. The superstructure 2 includes, for example, a bridge and various hangars. A wheelhouse is provided inside the bridge. Various equipment and facilities are stored in the hangars.

[0018] As mentioned above, the ship 100 has stealth capabilities because its primary mission is defense at sea. Specifically, it is designed to conceal the ship's 100's navigation position and direction of travel as much as possible from enemy detection means including radar and sonar. The hull 1 and superstructure 2 do not reflect radio waves Rw emitted from radar in the direction of the radiation, but absorb them or scatter them in other directions.

[0019] This prevents the ship's position from being determined by the enemy detection means. The size of the ship 100 projected on the radar is sometimes evaluated using an index called the radar cross section (RCS). The ship 100 is designed with the aim of keeping the RCS as small as possible.

[0020] (ship equipment) The ship equipment 3 is arranged on the deck 1a of the hull 1. Examples of the ship equipment 3 include radar, sonar, and a transmitter / receiver for satellite communications. A plurality of ship equipment 3 is arranged on the deck 1a. In this embodiment, the ship equipment 3 is arranged on the deck 1a in the center section 12 of the hull and on the deck 1a in the stern section 13.

[0021] (Radio wave reflector for ships) The ship radio wave reflector 4 is a plate that reflects radio waves Rw arriving from outside the hull 1. Hereinafter, the radio waves Rw arriving from outside the hull 1 will be referred to as "incoming radio waves Rw." As shown in Figures 1 and 2, multiple ship radio wave reflectors 4 are arranged on the deck 1a of the hull 1.

[0022] The ship radio wave reflecting plates 4 surround the ship equipment 3 in the direction in which the deck 1a extends. In this embodiment, multiple ship radio wave reflecting plates 4 are arranged on the deck 1a in the center part 12 of the hull and on the deck 1a in the stern part 13.

[0023] As shown in Fig. 2, the ship radio wave reflector 4 is flat and arranged on the deck 1a at an angle relative to the deck 1a. Specifically, the ship radio wave reflector 4 stands upright on the deck 1a at an angle so as to approach the ship equipment 3.

[0024] This allows the incoming radio waves Rw to be reflected in a direction different from the direction from which the incoming radio waves Rw came. Furthermore, even if the hull 1 experiences rolling (horizontal shaking) or pitching (vertical shaking), for example, it is possible to prevent the incoming radio waves Rw from hitting the shipboard equipment 3.

[0025] For ease of explanation, the state in which the ship radio wave reflector 4 is placed on the hull 1 and surrounds the ship equipment 3 in the direction in which the deck 1a extends will be referred to as the "stealth state," and the state in which the ship radio wave reflector 4 does not surround the ship equipment 3 in the direction in which the deck 1a extends will be referred to as the "non-stealth state." The ship radio wave reflector 4 comprises a core material 41 and a radio wave reflecting portion 42.

[0026] (core material) The core material 41 has a flat plate shape. The core material 41 has a pair of main surfaces 41a. The core material 41 is a foam or porous material made of plastic or the like. In this embodiment, the core material 41 is made of a polyvinyl chloride foam. In this embodiment, for example, "Divinycell H" manufactured by Diab is used for the core material 41.

[0027] (Radio wave reflector) The radio wave reflecting portion 42 reflects the incoming radio wave Rw. The radio wave reflecting portion 42 is formed as a pair integrally with the core material 41 so as to sandwich the core material 41 in the thickness direction of the core material 41. As shown in Fig. 3, the radio wave reflecting portion 42 has a metal mesh layer 423 and a reinforcing layer 420 (a first reinforcing layer 421 and a second reinforcing layer 422).

[0028] The metal mesh layer 423 is a layer made of metal. The metal mesh layer 423 is formed by weaving a plurality of metal wires together. When viewed from the plate thickness direction, the metal mesh layer 423 has a mesh shape. In this embodiment, the metal mesh layer 423 is made of a metal such as iron or aluminum. The metal mesh layer 423 reflects the incoming radio waves Rw.

[0029] The reinforcing layer 420 is a layer that is formed integrally with the metal mesh layer 423 to reinforce the strength of the metal mesh layer 423. In this embodiment, the reinforcing layer 420 is formed from glass fiber reinforced plastic. The reinforcing layer 420 has higher rigidity than the metal mesh layer 423. The reinforcing layer 420 also has higher rigidity and hardness than the core material 41. The reinforcing layer 420 is formed integrally with the metal mesh layer 423 as a pair so as to sandwich the metal mesh layer 423 in the plate thickness direction.

[0030] For ease of explanation, the reinforcing layer 420 disposed on the side farther from the core material 41 than the metal mesh layer 423 in the plate thickness direction will be referred to as the “first reinforcing layer 421,” and the reinforcing layer 420 disposed on the side closer to the core material 41 than the metal mesh layer 423 in the plate thickness direction will be referred to as the “second reinforcing layer 422.” In other words, the reinforcing layer 420 is composed of the first reinforcing layer 421 and the second reinforcing layer 422.

[0031] The first reinforcing layer 421 is formed integrally with the metal mesh layer 423 on the side opposite to the core material 41 with respect to the metal mesh layer 423. The second reinforcing layer 422 is formed integrally with the core material 41 and the metal mesh layer 423 between the core material 41 and the metal mesh layer 423. The second reinforcing layer 422 is joined to the main surface 41 a of the core material 41.

[0032] Therefore, the metal mesh layer 423, the first reinforcing layer 421, and the second reinforcing layer 422 in the pair of radio wave reflecting sections 42 that sandwich the core material 41 in the plate thickness direction are laminated in the plate thickness direction of the core material 41. In this embodiment, the first reinforcing layer 421 and the second reinforcing layer 422 are formed to the same thickness. Note that the term "same thickness" here refers to substantially the same thickness, and slight manufacturing errors and design tolerances are allowed.

[0033] Here, the radio wave reflecting portion 42 has a thickness thinner than that of the core material 41. In this embodiment, the core material 41 is formed to a thickness of, for example, 40 to 60 mm. In this embodiment, the pair of radio wave reflecting portions 42 are formed to a thickness of, for example, 3 to 5 mm. Therefore, the radio wave reflecting plate 4 for ships is formed to a thickness of 46 to 70 mm.

[0034] (Method of manufacturing radio wave reflectors for ships) Next, a method for manufacturing the radio wave reflector 4 for a ship in this embodiment will be described with reference to Fig. 4. The manufacturing method includes a laminating step S1, an impregnation step S2, and a curing step S3.

[0035] (Lamination process) The lamination step S1 is a step of laminating the metal mesh layer 423, the first reinforcing layer 421, and the second reinforcing layer 422 on the core material 41 in the order of the second reinforcing layer 422, the metal mesh layer 423, and the first reinforcing layer 421 in a direction away from the core material 41. In the lamination step S1, the radio wave reflecting portion 42 is formed by laminating the metal mesh layer 423, the first reinforcing layer 421, and the second reinforcing layer 422 in the plate thickness direction.

[0036] (Impregnation process) The impregnation step S2 is a step performed after the lamination step S1. In the impregnation step S2, liquid synthetic resin is supplied between the layers in the radio wave reflecting section 42 and between the radio wave reflecting section 42 and the core material 41, thereby impregnating the core material 41 and the radio wave reflecting section 42 with the synthetic resin. The spaces between the layers in the radio wave reflecting section 42 here refer to the spaces between the first reinforcing layer 421 and the metal mesh layer 423 in the reinforcing section, and between the metal mesh layer 423 and the second reinforcing layer 422.

[0037] (hardening process) The curing step S3 is a step performed after the impregnation step S2. The curing step S3 integrates the core material 41 and the radio wave reflecting portion 42 by curing the synthetic resin supplied between the layers of the radio wave reflecting portion 42 and between the radio wave reflecting portion 42 and the core material 41. In the curing step S3, a predetermined amount of heat is applied to the core material 41 that has undergone the impregnation step S2 and the radio wave reflecting portion 42 laminated on this core material 41, and the core material 41 is left for a predetermined time. This hardens the synthetic resin supplied between the layers of the radio wave reflecting portion 42 and between the radio wave reflecting portion 42 and the core material 41.

[0038] By going through the above series of steps, the radio wave reflector 4 for a ship is manufactured.

[0039] In the present embodiment, the impregnation step and the curing step S3 are performed using, for example, a Vacuum Impregnation Method (VaRTM), which is one of the non-autoclave molding methods. The synthetic resin used in the impregnation step is, for example, a thermosetting resin.

[0040] (Action and effect) According to the above embodiment, the metal mesh layer 423 of the radio wave reflecting portion 42 has a mesh shape, and therefore reflects radio waves Rw arriving from outside the hull 1. This makes it possible to prevent radio waves Rw arriving from outside the hull 1 from passing through the ship radio wave reflecting plate 4. Furthermore, since the pair of radio wave reflecting portions 42 are formed integrally with the core material 41 so as to sandwich the core material 41 in the plate thickness direction, it is possible to reflect more radio waves Rw arriving from outside than when, for example, one radio wave reflecting portion 42 is formed integrally with the core material 41.

[0041] Here, the core material 41 is made of polyvinyl chloride foam, and is therefore lighter in weight per unit volume than the metal mesh layer 423 made of metal and the first reinforcing layer 421 made of glass fiber reinforced plastic. In the above-mentioned radio wave reflector 4 for ships, the core material 41 is disposed between the pair of radio wave reflecting portions 42, and therefore the weight of the entire radio wave reflector 4 for ships can be reduced compared to, for example, a configuration in which the core material 41 is made of metal or glass fiber reinforced plastic.

[0042] Furthermore, the first reinforcing layers 421 of the pair of radio wave reflecting portions 42 are formed integrally with the metal mesh layer 423 together with the core material 41 so as to sandwich the metal mesh layer 423 therebetween. As a result, when a force that deforms the radio wave reflector 4 in an out-of-plane direction due to wind pressure or the like is applied to the radio wave reflector 4 for ships, the surface layer portion of the radio wave reflector 4 for ships, where stress is highest, can be efficiently reinforced by the highly rigid first reinforcing layer 421. In other words, the first reinforcing layer 421 can protect the metal mesh layer 423 while increasing the durability of the radio wave reflector 4 for ships as a whole.

[0043] As a result, the ship radio wave reflector 4 can reflect radio waves Rw arriving from outside the hull 1, while ensuring durability and reducing weight.

[0044] Furthermore, according to the above embodiment, the second reinforcing layer 422 is formed integrally with the core material 41 and the metal mesh layer 423 between the core material 41 and the metal mesh layer 423, which makes it possible to uniformly distribute stress generated in the metal mesh layer 423. As a result, the durability of the entire ship radio wave reflector 4 can be further improved.

[0045] (Other embodiments) The above describes in detail the embodiments of the present disclosure with reference to the drawings, but the specific configuration is not limited to the configuration of the embodiment, and additions, omissions, substitutions, and other modifications to the configuration are possible within the scope that does not deviate from the gist of the present disclosure.

[0046] As shown in FIG. 5 , the ship 100 may further include a hinge unit 5. The hinge unit 5 supports the ship radio wave reflector 4 rotatably relative to the hull 1. The hinge unit 5 is fixed on the deck 1a. The hinge unit 5 can hold the ship radio wave reflector 4 in a tilted state so that the ship radio wave reflector 4 approaches the ship equipment 3. The ship radio wave reflector 4 is also detachable from the hinge unit 5. This allows the ship radio wave reflector 4 to transition between the stealth state and the non-stealth state only by rotating the ship radio wave reflector 4 relative to the hull 1. In other words, the ship radio wave reflector 4 can transition between a state capable of reflecting the incoming radio waves Rw and a state incapable of reflecting the incoming radio waves Rw only by rotating the ship radio wave reflector 4 relative to the hull 1. Therefore, there is no need for workers on the ship 100 to attach or detach the ship radio wave reflector 4 from the hull 1.

[0047] In addition, in the embodiment, the reinforcing layer 420 of the radio wave reflecting portion 42 is configured by the first reinforcing layer 421 and the second reinforcing layer 422, but is not limited to this. The reinforcing layer 420 may be configured by only the first reinforcing layer 421. In this case, it is sufficient that the radio wave Rw reflecting layer of the radio wave reflecting portion 42 is joined to the main surface 41 a of the core material 41.

[0048] In addition, in the embodiment, the ship 100 has been described as a patrol vessel, but is not limited to this. The ship 100 may be a merchant ship, a small boat, or other vessel, instead of a vessel with a military or defense mission. In this case, examples of the type (ship type) of the ship include a liquefied gas carrier, a container ship, a tanker, a bulk carrier, a car carrier, a roll-on-roll-off cargo ship, a cargo-passenger ship (ferry), a passenger ship, a fishing boat, and a special-purpose ship.

[0049] <Additional Notes> The radio wave reflector for a ship described in the embodiment, the ship equipped with the same, and the method for manufacturing the radio wave reflector for a ship can be understood, for example, as follows.

[0050] (1) The first embodiment of the radio wave reflector 4 for a ship is arranged on a hull 1 and reflects radio waves Rw arriving from outside the hull 1. The radio wave reflector 4 for a ship comprises a flat core material 41 formed from a polyvinyl chloride foam material, and a pair of radio wave reflecting portions 42 formed integrally with the core material 41 so as to sandwich the core material 41 in the thickness direction of the plate. The radio wave reflecting portions 42 each have a metal mesh layer 423 formed from metal, and a first reinforcing layer 421 formed from glass fiber reinforced plastic and formed integrally with the metal mesh layer 423 on the opposite side of the core material 41 from the core material 41.

[0051] As a result, the metal mesh layer 423 prevents radio waves Rw arriving from outside the hull 1 from passing through the ship radio wave reflector 4. In addition, since the core material 41 is disposed between the pair of radio wave reflecting portions 42, the weight of the ship radio wave reflector 4 can be reduced compared to when the core material 41 is made of metal or glass fiber reinforced plastic.

[0052] (2) The second aspect of the radio wave reflector 4 for ships is the radio wave reflector 4 for ships of (1), wherein the radio wave reflecting portion 42 is formed from glass fiber reinforced plastic and may further have a second reinforcing layer 422 formed integrally with the core material 41 and the metal mesh layer 423 between the core material 41 and the metal mesh layer 423.

[0053] This allows the distribution of stress generated in the metal mesh layer 423 to be uniform.

[0054] (3) A ship 100 according to a third aspect includes the hull 1 and the ship radio wave reflector 4 according to (1) or (2).

[0055] (4) The ship 100 according to a fourth aspect is the ship 100 according to (3), and may further include a hinge portion 5 that supports the ship radio wave reflector 4 rotatably relative to the hull 1.

[0056] This allows the ship radio wave reflector 4 to transition between a state in which it can reflect the incoming radio waves Rw and a state in which it cannot reflect the incoming radio waves Rw, without having to attach or detach the ship radio wave reflector 4 from the hull 1.

[0057] (5) A fifth aspect of the manufacturing method of a radio wave reflector 4 for a ship includes a core material 41 formed of a polyvinyl chloride foam in the shape of a flat plate, and a pair of radio wave reflecting portions 42 formed integrally with the core material 41 so as to sandwich the core material 41 in the thickness direction, and the metal mesh layer 423 formed of metal, the first reinforcing layer 421 formed of glass fiber reinforced plastic, and the second reinforcing layer 422 formed of glass fiber reinforced plastic are separated from the core material 41. The method includes a lamination process S1 in which the second reinforcing layer 422, the metal mesh layer 423, and the first reinforcing layer 421 are laminated on the core material 41 in that order in the direction perpendicular to the surface of the core material 41 to form the radio wave reflecting portion 42; an impregnation process S2 in which liquid synthetic resin is supplied between the layers of the radio wave reflecting portion 42 and between the radio wave reflecting portion 42 and the core material 41 to impregnate the core material 41 and the radio wave reflecting portion 42 with the synthetic resin; and a curing process S3 in which the synthetic resin is cured to integrate the core material 41 and the radio wave reflecting portion 42. [Explanation of symbols]

[0058] 1...Hull 1a...Deck 2...Superstructure 3...Ship equipment 4...Ship radio wave reflector 5...Hinge 11...Bow 11a...Bulbous bow 12...Central hull 13...Stern 13a...Screw 13b...Rudder 41...Core material 41a...Main surface 42...Radio wave reflecting part 100...Ship 420...Reinforcing layer 421...First reinforcing layer 422...Second reinforcing layer 423...Metal mesh layer D...Direction of travel Rw...Radio waves S1...Laminating process S2...Impregnation process S3...Curing process

Claims

1. A ship radio wave reflector that is placed on a hull and reflects radio waves arriving from outside the hull, a core material formed of a polyvinyl chloride foam and having a flat plate shape; a pair of radio wave reflecting portions formed integrally with the core material so as to sandwich the core material in a plate thickness direction; Equipped with The radio wave reflecting portion is a metal mesh layer formed of a metal; a first reinforcing layer made of glass fiber reinforced plastic and integrally formed with the metal mesh layer on the opposite side of the core material with respect to the metal mesh layer; A radio wave reflector for ships.

2. The radio wave reflecting portion is 2. The radio wave reflector for a ship according to claim 1, further comprising a second reinforcing layer formed of glass fiber reinforced plastic and integrally formed with the core material and the metal mesh layer between the core material and the metal mesh layer.

3. The hull; The radio wave reflector for a ship according to claim 1 or 2; A ship equipped with:

4. The ship according to claim 3, further comprising a hinge portion that rotatably supports the ship radio wave reflector with respect to the hull.

5. a core material formed in a flat plate shape using a polyvinyl chloride foam; a pair of radio wave reflecting portions formed integrally with the core material so as to sandwich the core material in a plate thickness direction; A method for manufacturing a radio wave reflector for a ship, comprising: a lamination step of laminating a metal mesh layer made of metal, a first reinforcing layer made of glass fiber reinforced plastic, and a second reinforcing layer made of glass fiber reinforced plastic on the core material in this order of the second reinforcing layer, the metal mesh layer, and the first reinforcing layer in a direction away from the core material, thereby forming the radio wave reflecting portion; an impregnation step of supplying a liquid synthetic resin between the layers of the radio wave reflecting portion and between the radio wave reflecting portion and the core material, thereby impregnating the core material and the radio wave reflecting portion with the synthetic resin; a curing step of integrating the core material and the radio wave reflecting portion by curing the synthetic resin; A method for manufacturing a radio wave reflector for a ship.

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