An electromagnetic shielding composition includes silver particles (A), and a first solvent (B). The first solvent (B) has at least one structure selected from the group consisting of a structure represented by the formula (1) and a structure represented by the formula (2) and has a boiling point of less than 200° C.

The present disclosure relates to a radar apparatus including a circuit board provided inside a housing having an upper side open, and on which an RF element is mounted on an upper surface, and a cavity having an open lower side and coupled to the upper surface of the circuit board for accommodating the RF element, wherein the cavity includes a coupling portion extending downwardly in a region of a surface coupled to the circuit board, and the coupling portion is inserted into a coupling hole formed in the circuit board to contact a ground plane of the circuit board.

Described are electromagnetic shields comprising a substrate, a conductive additive, and a binder incorporated with the conductive additive and deposited on the substrate, and methods of making thereof.

An electrically conductive plastic product is made via rotational moulding. The product comprises a plastic matrix; and a network of conductive fibers of discrete length embedded in the plastic matrix. The conductive fibers are metal fibers. The network of conductive fibers provides electrical conductivity to the plastic product. The average length of the conductive fibers is at least 3 mm.

Exemplary embodiments of the present disclosure provide a system, apparatus, and methods for producing a high-performance camouflage and thermal management composite fabric textile systems. The systems comprise woven and non-woven composite fabrics consisting of layers for thermal and electromagnetic wave propagation as well as human thermal emission control. The systems incorporate thermal plastic insulation, felt insulation, electromagnetic wave absorption materials, electromagnetic wave propagation and thermal emission control elements, and camouflage pigment patterns. Dots containing encapsulated metallic particulates enable omni-spectral electromagnetic wave and thermal radiation signature manipulation and control as well as cost-effective manufacturing. Single blended textile processed via needle punching produces hair/fur-like protrusions made from a multilayer fabric composition having EM wave and thermal radiation control elements. The protrusions subsequently contain EM propagation and thermal emission control elements on their surfaces for omni-spectral camouflage and detection mitigation. The systems expand the options for meeting the demands of today and future stealth missions.

An antenna installation having an antenna and a wire assembly. The antenna has a first end and a second end, with the antenna having a radiative distribution pattern and RF input characteristics. The wire assembly is positioned in close proximity to the antenna. The wire assembly includes a conductor and an RF insulative wrap. The conductor has a first end and a second end and at least one conductive element extending between the first end and the second end. The RF insulative wrap encircles the conductor between the first end and the second end. The RF insulative wrap includes a magnetic sheet having a magnetic metal powder within a polymer matrix. A method of preparing a wire assembly as well as the wire assembly itself are likewise disclosed.

The present disclosure provides an electromagnetic wave absorbing material, including a core containing iron oxide having a first thermal expansion coefficient; and a shell layer covering the core, which has a second thermal expansion coefficient less than the first thermal expansion coefficient, and the shell layer contains an inorganic compound selected from a group consisting of oxides, nitrides or any combination thereof. The present disclosure further provides a composite structure for suppressing electromagnetic interference including the electromagnetic wave absorbing material as claimed.

A conductive film that includes particles of a layered material including one or plural layers, wherein the one or plural layers include a layer body represented by: M.sub.mX.sub.n, wherein M is at least one metal of Group 3, 4, 5, 6, or 7, X is a carbon atom, a nitrogen atom, or a combination thereof, n is 1 to 4, and m is more than n and 5 or less, and a modifier or terminal T exists on a surface of the layer body, wherein T is at least one selected from the group consisting of a hydroxyl group, a fluorine atom, a chlorine atom, an oxygen atom, or a hydrogen atom, and wherein a χ-axis direction rocking curve half-value width for a peak of a (001) plane (1 is a natural number multiple of 2) obtained by X-ray diffraction measurement of the conductive film is 10.3° or less.

An electronic device including a shielding member for performing an electromagnetic interference (EMI) shielding function is provided. The electronic device includes a printed circuit board including a first area in which first electronic components having a first frequency as a driving frequency are mounted, and a second area in which second electronic components having a second frequency as a driving frequency are mounted, a shielding film disposed to cover the first area and the second area of the printed circuit board and attached to a first ground portion of the printed circuit board, and at least one conductive member formed to extend in a direction perpendicular to an extending direction of the printed circuit board. The at least one conductive member includes a first end that contacts the shielding film, and a second end that contacts a second ground portion of the printed circuit board, the second end being disposed between the first area and the second area of the printed circuit board.

The present invention aims to provide a multi-layer sheet with excellent electromagnetic wave shielding properties. The multi-layer sheet includes an alternating multilayer unit with five or more A layer and B layer alternately laminated, in which the electromagnetic return loss at the peak top in the peak of return loss spectrum with the highest return loss at the peak top is 5 dB or more in a chart of the return loss in the multi-layer sheet.