Abstract: An electromagnetic shield includes a plate-shaped base and first projecting portions. The base has a first surface and a second surface, the first surface being configured to allow an electromagnetic wave to be incident on the first surface. The second surface is distant from the first surface and extends along the first surface. The electromagnetic shield includes a dielectric. In the electromagnetic shield, at least one of the first projecting portions has a side including a first point and a second point, the side makes different inclination angles with a projecting direction of the first projecting portion at the first point and the second point. In the projecting direction of the first projecting portion, the second point is closer to the first surface-than the first point is. On the side, an inclination angle ? is greater than an inclination angle ?.

Abstract: An electromagnetic shield includes a plate-shaped base. The base has a first surface and a second surface. The second surface is distant from the first surface and extends along the first surface. The first surface includes a plurality of first recessed portions and a first solid portion. The first solid portion includes a surface in contact with an edge of the first recessed portion in the particular direction, the surface being a basis of a depth of the first recessed portion. The first solid portion has a dimension in a depth direction of the first recessed portion. The second surface includes a plurality of second recessed portions arranged alternately with the plurality of first recessed portions in the particular direction.

Abstract: A thermal insulation material for a battery of the present invention includes a compression adjustment layer and a thermal insulation layer laminated to each other. A ratio of a thickness of the compression adjustment layer to a thickness of the thermal insulation layer is more than 0.5 and less than 4.5, and a compressive stress is from 0.34 MPa through 3.45 MPa when the compression adjustment layer is compressed and deformed at any rate within a range of from 25% through 70% in a thickness direction with respect to a thickness before compression.

Abstract: An electromagnetic shield includes a plate-shaped base having 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 and extends along the first surface. The electromagnetic shield includes projecting strip portions. The electromagnetic shield includes a dielectric. The electromagnetic shield has a space forming either a gap or a hole, and the gap or the hole is in contact with the projecting strip portion along a direction intersecting with a longitudinal direction of the projecting strip portion.

Abstract: An electromagnetic shield includes a plate-shaped solid portion having a first surface configured to allow an electromagnetic wave to be incident on the first surface. The solid portion includes solid dielectrics having different relative permittivities. The solid dielectrics are disposed in turn in contact with each other in a particular direction along the first surface.

Abstract: An electromagnetic shield includes a plate-shaped base. The base has a first surface and a second surface. The second surface is distant from the first surface and extends along the first surface. The first surface includes a plurality of first recessed portions and a first solid portion. The first solid portion includes a surface in contact with an edge of the first recessed portion in the particular direction, the surface being a basis of a depth of the first recessed portion. The first solid portion has a dimension in a depth direction of the first recessed portion. The second surface includes a plurality of second recessed portions arranged alternately with the plurality of first recessed portions in the particular direction.

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 wave absorber (1) includes a dielectric layer (10), a resistive layer (20), and an electrically conductive layer (30). The resistive layer (20) is disposed on one principal surface of the dielectric layer (10). The electrically conductive layer (30) is disposed on the other principal surface of the dielectric layer (10) and has a sheet resistance lower than a sheet resistance of the resistive layer (20). The resistive layer (20) has a sheet resistance of 200 to 600 ?/?. When the resistive layer (20) is subjected to an immersion treatment in which the resistive layer (20) is immersed in a 5 weight % aqueous solution of NaOH for 5 minutes, an absolute value of a difference between a sheet resistance of the resistive layer (20) before the immersion treatment and a sheet resistance of the resistive layer (20) after the immersion treatment is less than 100 ?/?.

Abstract: An electromagnetic wave absorber (1) includes a dielectric layer (10), a resistive layer (20), and an electrically conductive layer (30). The resistive layer (20) is disposed on one principal surface of the dielectric layer (10). The electrically conductive layer (30) is disposed on the other principal surface of the dielectric layer (10) and has a sheet resistance lower than a sheet resistance of the resistive layer (20). The resistive layer (20) has a sheet resistance of 200 to 600?/?. When the resistive layer (20) is subjected to an immersion treatment in which the resistive layer (20) is immersed in a 5 weight % aqueous solution of NaOH for 5 minutes, an absolute value of a difference between a sheet resistance of the resistive layer (20) before the immersion treatment and a sheet resistance of the resistive layer (20) after the immersion treatment is less than 100?/?.

Abstract: An electromagnetic wave absorber (1) includes a dielectric layer (10), a resistive layer (20), and an electrically conductive layer (30). The resistive layer (20) is disposed on one principal surface of the dielectric layer (10). The electrically conductive layer (30) is disposed on the other principal surface of the dielectric layer (10) and has a sheet resistance lower than a sheet resistance of the resistive layer (20). The resistive layer (20) is a layer that includes tin oxide or titanium oxide as a main component or a layer that is made of indium tin oxide including 40 weight % or more of tin oxide.

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: An electromagnetic wave absorber includes an electromagnetic wave-absorbing layer (10) and an adhesive layer (20). The adhesive layer (20) is disposed on at least one surface of the electromagnetic wave-absorbing layer (10). The electromagnetic wave absorber is capable of being adhered to a surface having a step in such a manner that the adhesive layer (20) is in contact with the surface. The adhesive layer (20) has a thickness equal to or greater than a reference height determined by subtracting 0.1 mm from the height of the step. In the electromagnetic wave absorber, a return loss ?R defined by ?R=Rt?Rr is 15 dB or more. Rt is a reflection amount of a 76-GHz electromagnetic wave and is measured for a reference specimen. Rr is a reflection amount of a 76-GHz electromagnetic wave and is measured for a specimen obtained by adhering the electromagnetic wave absorber.

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: An electromagnetic wave absorber (1a) includes a first layer (10) and an electrically conductive layer (20). The first layer (10) is a dielectric layer or a magnetic layer. The electrically conductive layer (20) is provided on at least one surface of the first layer. A product of a Young's modulus of the first layer (10) and a thickness of the first layer (10) is 0.1 to 1000 MPa·mm. The first layer (10) has a relative permittivity of 1 to 10.

Abstract: An electromagnetic wave absorber (1a) includes a resistive layer (10), an electrically conductive layer (20) and a dielectric layer (30). The electrically conductive layer (20) has a sheet resistance lower than a sheet resistance of the resistive layer (10). The dielectric layer (30) is disposed between the resistive layer (10) and the electrically conductive layer (20). The electromagnetic wave absorber (1a) has a first slit (15). The first slit (15) extends, in the resistive layer (10), from a first principal surface (10a) distal to the dielectric layer (30) toward the dielectric layer (30) in a direction perpendicular to the first principal surface (10a) and divides the resistive layer (10) into a plurality of first blocks (17). Each of the first blocks (17) has a minimum dimension (D1) of 2 mm or more at the first principal surface (10a).

Abstract: For the purpose of providing an electromagnetic wave absorber usable for radar having a high resolution and sufficiently adaptable to a plurality of radars different in frequency, the bandwidth of a frequency band in which an electromagnetic wave absorption amount is not less than 20 dB is not less than 2 GHz, within a frequency band of 60 to 90 GHz.

Abstract: For the purpose of providing an electromagnetic wave absorber usable for radar having a high revolution and sufficiently adaptable to a plurality of radars different in frequency, the bandwidth of a frequency band in which an electromagnetic wave absorption amount is not less than 20 dB is not less than 2 GHz, within a frequency band of 60 to 90 GHz.