The invention concerns an electromagnetic absorbent comprising: a metal earth plane, an insulating dielectric substrate, disposed on said metal earth plane, a set of metal resonant elements disposed on said insulating dielectric substrate, the electromagnetic resonant frequency of a resonant element being adjusted by adapting the dimensions of the resonant element, the set of resonant elements comprising resonant elements with different dimensions so as to enable the production, by juxtaposition of different electromagnetic resonant frequencies, of a predetermined electromagnetic absorption band. An elementary pattern formed by a plurality of metal resonant elements can be replaced periodically.

An electronic module that comprises a housing that receives at least one electronic component is disclosed. The housing contains a polymer composition that includes an electromagnetic interference filler distributed within a polymer matrix, wherein the electromagnetic interference filler includes a plurality of carbon fibers and the polymer matrix contains a thermoplastic polymer. Further, the composition exhibits an electromagnetic interference shielding effectiveness of about 30 decibels or more, as determined in accordance with ASTM D4935-18 at a frequency of 5 GHz and thickness of 1 millimeter, and an in-plane thermal conductivity of about 1 W/m-K or more, as determined in accordance with ASTM E 1461-13.

A wellbore servicing tool. The wellbore servicing tool comprises a tool body, an electromagnetic transmitter coupled to the tool body, an electromagnetic receiver coupled to the tool body and spaced apart from the electromagnetic transmitter, wherein a portion of the tool body between the electromagnetic transmitter and the electromagnetic receiver defines a direct signal path between the electromagnetic transmitter and the electromagnetic receiver, and an absorbing material coupled to the tool body in the direct signal path between the electromagnetic transmitter and the electromagnetic receiver, proximate to the electromagnetic receiver.

Systems according to the present disclosure provide one or more surfaces that function as power transferring surfaces for which at least a portion of the surface includes or is composed of “fractal cells” placed sufficiently closed close together to one another so that a surface (plasmonic) wave causes near replication of current present in one fractal cell in an adjacent fractal cell. A fractal of such a fractal cell can be of any suitable fractal shape and may have two or more iterations. The fractal cells may lie on a flat or curved sheet or layer and be composed in layers for wide bandwidth or multibandwidth transmission.

An absorption device for absorbing electromagnetic radiation at least in a partial range within a frequency range from 500 MHz to 15 GHz includes a housing (1), which is at least partially transmissive to the electromagnetic radiation to be absorbed and has an inner receptacle space (3), which contains a fill, which includes irregularly arranged absorption elements (4). The absorption elements each include a carrier body (4a) made of an electrically insulating material, on which a layer (4b) is applied externally at least on one side, which is formed by an electrically conductive material.

A multilayer thin film that reflects an omnidirectional structural color having a reflective core layer comprising a metallic material, a second layer extending across the reflective core layer, a third layer extending across the second layer, and an outer layer extending across the third layer. The multilayer thin film reflects a single narrow band of visible light that is less than 30° measured in Lab color space when viewed from angles between 0° and 45°, and the reflective core layer has a skin depth δ of greater than or equal to 1.0 μm in a frequency range from 20-40 GHz, as calculated by: $\delta =\sqrt{\frac{2\rho }{\left(2\pi f\right)\left({\mu }_0{\mu }_r\right)}}\approx 503\sqrt{\frac{\rho }{{\mu }_{r}f}},$
δ is skin depth in meters (m); ρ is resistivity in ohm meter (Ω.Math.m); f is frequency of an electromagnetic radiation in hertz (Hz); μ.sub.0 is permeability; and μ.sub.r is relative permeability of the metallic material.

A wellbore servicing tool. The wellbore servicing tool comprises a tool body, an electromagnetic transmitter coupled to the tool body, an electromagnetic receiver coupled to the tool body and spaced apart from the electromagnetic transmitter, wherein a portion of the tool body between the electromagnetic transmitter and the electromagnetic receiver defines a direct signal path between the electromagnetic transmitter and the electromagnetic receiver, and an absorbing material coupled to the tool body in the direct signal path between the electromagnetic transmitter and the electromagnetic receiver, proximate to the electromagnetic receiver.

A radio wave absorber film which is thin and exhibits excellent radio wave absorption performance; and a method for producing this radio wave absorber film. The radio wave absorber film formed on a base material layer contains a magnetic body and a binder resin in a radio wave absorption layer; and an aromatic ester-urethane copolymer is used as the binder resin. The glass transition temperature of the binder resin is 100° C. or less, and 0° C. or less. The magnetic body is at least one of an ε-iron oxide, a barium ferrite magnetic body and a strontium ferrite magnetic body

A laminate in which a carbon nanotube layer is stably laminated; a coating member having the same; and a laminate manufacturing method are provided. This laminate includes: an insulating layer that mainly contains a resin composition; a cellulose fiber layer that is laminated on the insulating layer and mainly contains a microfibrous cellulose having a fiber width of 1000 nm or smaller; and a carbon nanotube layer that is laminated on the cellulose fiber layer and mainly contains carbon nanotubes.

An electromagnetic wave absorption structure includes at least one electromagnetic wave composite absorbing layer. The electromagnetic wave composite absorbing layer includes a conductive composite layer and an insulating layer. The insulating layer is stacked and overlapped with the conductive composite layer. The electromagnetic wave absorption structure can provide good electromagnetic wave absorption function, and have the features of light and thin, so it is particularly suitable for satisfying the electromagnetic wave absorption or shielding requirements of thin electronic products.