Abstract: A method for designing radio scattering bodies includes making a determination of a value of an objective function. The objective function represents a radio scattering property of a design target for a case where a radio wave is incident on the design target under a given condition. The determination of the value is made by computation using an analysis model including the design target, the analysis model being created on the basis of a set value of a parameter describing a shape of the design target.

Abstract: An electromagnetic shield is disposed in front of a radar. The radar has different angles of view in different directions. The radar has a first angle of view in a first direction and a second angle of view in a second direction. The second angle of view is smaller than the first angle of view. The second direction is orthogonal to the first direction. The electromagnetic shield has a pair of first sides and a pair of second sides. The pair of first sides face each other in the first direction. The pair of second sides face each other in the second direction. The electromagnetic shield includes a dielectric. At least one of the pair of first sides includes a structure having at least one selected from the group consisting of a projecting portion and a recessed portion.

Abstract: An electromagnetic shield includes a plate-shaped base, a plurality of first projecting portions, and a contact portion. The base has a first surface and a second surface. The first surface is a surface configured to allow an electromagnetic wave to be incident on the first surface. The second surface is distant from the first surface. The plurality of first projecting portions project from the first surface in a direction away from the second surface. The electromagnetic shield is capable of being attached to a component such that the component is in contact with the contact portion and the first surface faces the component. A distance from the contact portion to the particular portion in a direction parallel to the first surface is equal to or shorter than a first distance d1 between the first projecting portion closest to the contact portion and the contact portion.

Abstract: An electromagnetic shield includes a plate-shaped base, a plurality of first projecting portions, and a plurality of second projecting portions. The plate-shaped base has a first surface and a second surface. The first surface is a surface configured to allow an electromagnetic wave Ei to be incident on the first surface. The second surface is a surface being distant from the first surface and extending along the first surface. The plurality of first projecting portions project from the first surface in a direction away from the second surface. The plurality of second projecting portions project from the second surface in a direction away from the first surface. The electromagnetic shield includes a dielectric.

Abstract: The present invention provides a member which, with a novel configuration, can transmit and attenuate incident radio waves, without the need for mixing a radio wave absorption material for example a dielectric loss material such as carbon particles or a magnetic loss material such as an iron oxide powder, or incorporating a scattering body. Provided is a radio wave scattering body that is characterized by being configured to transmit at least a portion of incident radio waves and to emit the transmitted radio waves in a scattering state, and comprising a resin composition in which a resin is a main component.

Abstract: An electromagnetic shield 1a has a first surface 11 and a second surface 12. The electromagnetic shield 1a includes a dielectric. The first surface 11 is a surface configured to allow an electromagnetic wave to be incident on the first surface 11. The second surface 12 is a surface configured to allow at least a portion of the electromagnetic wave incident on the first surface to emerge from the second surface 12. When an electromagnetic wave WEM is transmitted to be incident on the first surface at incident angles of 45°, 60°, and 75°, the electromagnetic shield 1a satisfies at least one requirement selected from the group consisting of (I-1), (I-2), and (I-3) below. 10 Log|PR45/PT45|?5.0[dB]??(I-1) 10 Log|PR60/PT60|?5.0[dB]??(I-2) 10 Log|PR75/PT75|?5.

Abstract: A composite material and an electromagnetic wave absorber made by molding the same, which are capable of exhibiting an excellent electromagnetic wave absorption function and capable of suppressing the deterioration of mechanical properties of the electromagnetic wave absorber itself. A composite material comprising a single type of thermoplastic resin and a conductive filler contained in a dispersed state in the thermoplastic resin, wherein the composite material includes at least one portion A and a portion B with different conductive filler content percentages in a mixed manner, and wherein the ratio of the conductive filler content percentage in the portion A to the conductive filler content percentage in the portion B is greater than 1.0; and an electromagnetic wave absorber made by molding the same.

Abstract: A radio wave absorbing member 1a includes a radio wave absorber 10 and a support 20 having a sheet shape. The radio wave absorber 10 includes a resistive layer 12, a reflective layer 14, and a dielectric layer 13. The reflective layer 14 reflects a radio wave. The dielectric layer 13 is disposed between the resistive layer 12 and the reflective layer 14 in the thickness direction of the reflective layer 14. The support 20 supports the radio wave absorber 10. The support 20 includes a matrix resin 20m and a flame retardant 20p.

Abstract: A radio wave absorber includes a first radio wave absorbing portion and a second radio wave absorbing portion. The first radio wave absorbing portion has the largest amount of reflection and absorption, as measured according to JIS R 1679: 2007, of a radio wave with a given frequency f at a first incident angle ?1 in an incident angle range of 0° to 80°. The second radio wave absorbing portion has the largest amount of reflection and absorption of the radio wave at a second incident angle ?2 in an incident angle range of 0° to 80°. Magnitude of the second incident angle ?2 is different from magnitude of the first incident angle ?1, or a polarized wave type of the radio wave incident at the second incident angle ?2 is different from a polarized wave type of the radio wave incident at the first incident angle ?1.

Abstract: The present invention provides a transparent substrate (10) in which the transparent substrate (10) is formed by fully curing a semi-cured product layer (13s) of an intermediate laminate (1) which includes a base material (11) having light-transmitting properties, an anti-reflective layer (14) provided on at least one surface of the base material (11), and the semi-cured product layer (13s) that is provided between the base material (11) and the anti-reflective layer (14) and is formed of a semi-cured product of an ultraviolet-curable resin composition, a surface of the anti-reflective layer (14) has an irregular uneven structure, and a surface of the uneven structure has an arithmetic mean roughness Ra of 0.01 to 1.00 ?m and am mean unevenness period RSm of 1 to 30 ?m, the anti-reflective layer (14) includes a low refractive index layer (14a) having a refractive index of 1.47 or less and a thickness of 50 to 200 nm at an outermost layer, a Young's modulus of the semi-cured product layer (13s) is 0.1 to 2.

Abstract: A radio wave absorbing member 1a includes a radio wave absorber 10 and a support 20 having a sheet shape. The radio wave absorber 10 includes a resistive layer 12, a reflective layer 14, and a dielectric layer 13. The reflective layer 14 reflects a radio wave. The dielectric layer 13 is disposed between the resistive layer 12 and the reflective layer 14 in the thickness direction of the reflective layer 14. The support 20 supports the radio wave absorber 10. The support 20 includes a matrix resin 20m and a flame retardant 20p.