Abstract: Systems and methods using passive reflectors or reflectarrays are provided to enhance non-line-of-sight (NLOS) wireless signals. Multiple reflectarrays are combined and positioned to cover a wide range of user positions/beam angles. The passive reflectarrays include at least one of a first reflectarray configured to split an incident beam and a second reflectarray configured to steer the incident beam with an off-plane of incidence.

Abstract: A magnetic shielding film includes opposing first and second major surfaces and a plurality of particles dispersed therebetween, each particle having a magnetic permeability, a thickness H along a thickness direction of the particle, and a longest dimension L along a length direction of the particle orthogonal to the thickness direction, L/H greater than or equal to 2, the particles defining a plurality of voids therebetween, the length directions of at least 60% of the particles oriented within 5.5 degrees of a same orientation direction.

Abstract: Articles to control an electromagnetic (EM) radiation in the range of 1 GHz to 100 GHz, and methods of making and using the same are provided. An EM controlling sheet structure includes a dielectric carrier layer and an array of metallic resonant elements supported by the dielectric carrier layer to form an EM metamaterial structure in a non-random pattern. The metallic resonant elements are oriented such that each metallic resonant element has an axis substantially parallel to each other and substantially parallel to a major plane of the dielectric carrier layer.

Abstract: A magnetic shielding film includes opposing first and second major surfaces and a plurality of particles dispersed therebetween, each particle having a magnetic permeability, a thickness H along a thickness direction of the particle, and a longest dimension L along a length direction of the particle orthogonal to the thickness direction, L/H greater than or equal to 2, the particles defining a plurality of voids therebetween, the length directions of at least 60% of the particles oriented within 5.5 degrees of a same orientation direction.

Abstract: Optically transparent reflectarray articles and methods of making and using the same are provided. The reflectarray article includes a frequency selective surface (FSS) layer and a ground plane layer disposed on opposite sides of a dielectric substrate. The FSS layer includes a pattern of wire-like resonating metallic elements configured to reflect incident mmWaves, and the ground plane layer includes a pattern of metal-based conductor mesh to provide conductivity and high visible light transmittance.

Abstract: A composite comprising a polymeric matrix and EM absorbers dispersed within the polymeric matrix. Each EM absorber comprises a dielectric flake, and a continuous magnetic coating on at least one major surface of the dielectric flake. The EM absorbers function as dielectric and magnetic absorbers in the 1-100 GHz frequency range. The composite can be used as an electromagnetic shielding article to mitigate electromagnetic interference in, for example, high speed, high frequency (HSHF) consumer electronics.

Abstract: A system and method for visually enhancing an original image of an eye includes a visualization module. A controller is configured to convert an output of the visualization module to a first pixel cloud in a first color space and map the first pixel cloud to a second pixel cloud in a second color space. The method includes identifying at least one selected zone in the second color space. The controller is configured to move the selected zone from an original location to a modified location in the second color space. The second pixel cloud is updated to obtain a modified second pixel cloud, which is transformed into a third pixel cloud in the first color space. An enhanced image is formed based in part on the modified second pixel cloud and provides selective visual enhancement in the selected zone without affecting contrast in a remainder of the original image.

Abstract: Method of making a polymer matrix composite comprising a porous polymeric network structure; and a plurality of particles distributed within the polymeric network structure, the method comprising: combining a thermoplastic polymer, a solvent that the thermoplastic polymer is soluble in, and a plurality of particles to provide a slurry; forming the slurry in to an article; heating the article in an environment to retain at least 90 percent by weight of the solvent, based on the weight of the solvent in the slurry, and inducing phase separation of the thermoplastic polymer from the solvent to provide the polymer matrix composite.

Abstract: A thermal interface layer includes pluralities of first and second particles dispersed in a polymeric binder at a total loading V in a range of about 40 volume percent to about 70 volume percent. The first and second particles have different compositions. The first particles include one or more of iron or nickel. The second particles include one or more of aluminum, magnesium, silicon, copper, or zinc. The thermal interface layer has a thermal conductivity in a thickness direction of the thermal interface layer in units of W/mK of at least K=5.1?0.17 V+0.002 V2.

Abstract: A magnetic film includes a plurality of magnetically permeable particles dispersed between opposing first and second major surfaces of the magnetic film. The first and second major surfaces are spaced apart a distance D. The particles are agglomerated so as to form a plurality of substantially continuous layers of particles generally extending along orthogonal first and second directions and arranged along a third direction. Each substantially continuous layer of particles has a length L along the first direction from a first to an opposing second edge of the magnetic film and a width W along the second direction extending from the first to the second major surface. L/D?100.

Abstract: An electrically conductive adhesive layer includes a plurality of particles dispersed between opposing first and second major surfaces of the electrically conductive adhesive layer. The first and second major surfaces are spaced apart a distance D. The particles are agglomerated so as to form a plurality of substantially continuous layers of particles generally extending along orthogonal first and second directions and arranged along a third direction. Each substantially continuous layer of particles has a length L along the first direction from a first to an opposing second edge of the electrically conductive adhesive layer and a width W along the second direction extending from the first to the second major surface. L/D ? 100. At least some of the particles are electrically conductive.

Abstract: A magnetic shielding film includes opposing first and second major surfaces and a plurality of particles dispersed therebetween, each particle having a magnetic permeability, a thickness H along a thickness direction of the particle, and a longest dimension L along a length direction of the particle orthogonal to the thickness direction, L/H greater than or equal to 2, the particles defining a plurality of voids therebetween, the length directions of at least 60% of the particles oriented within 5.5 degrees of a same orientation direction.

Abstract: (Co)polymer matrix composites including a porous (co)polymeric network; a multiplicity of thermally-conductive particles and a multiplicity of magnetic particles distributed within the (co)polymeric network structure; wherein the thermally-conductive particles, magnetic particles and optional magnetic particles are present in a range from 15 to 99 weight percent, based on the total weight of the particles and the (co)polymer (excluding the solvent). Methods of making and using the (co)polymer matrix composites are also disclosed. The (co)polymer matrix composites are useful, for example, as heat dissipating or heat absorbing thermal interface materials that also provide magnetic properties useful, for example, in flux field directional materials or shielding from electromagnetic interference.

Abstract: A magnetic isolator includes a dielectric film having a layer of electrically-conductive soft magnetic material bonded thereto. The layer of electrically-conductive soft magnetic material comprises substantially coplanar electrically-conductive soft magnetic islands separated one from another by gaps. At least some of the electrically-conductive soft magnetic islands have an outer insulating oxidized layer that electrically insulates them from adjacent electrically-conductive soft magnetic islands. The gaps at least partially suppress electrical eddy current induced within the layer of soft magnetic material when in the presence of applied external magnetic field. An electronic device including the magnetic isolator and a method of making the magnetic isolator are also disclosed.

Abstract: Method of making a polymer matrix composite comprising a porous polymeric network structure; and a plurality of particles distributed within the polymeric network structure, the method comprising: combining a thermoplastic polymer, a solvent that the thermoplastic polymer is soluble in, and a plurality of particles to provide a slurry; forming the slurry in to an article; heating the article in an environment to retain at least 90 percent by weight of the solvent, based on the weight of the solvent in the slurry, and inducing phase separation of the thermoplastic polymer from the solvent to provide the polymer matrix composite.

Abstract: High frequency power inductor material having first and second opposed major surfaces, comprising a thermosetting binder and a plurality of multilayered flakes dispersed in the high temperature binder, the multilayered flakes comprising at least two layer pairs, wherein each layer pair comprises a ferromagnetic layer and a dielectric electrical isolation layer so that the ferromagnetic layers are electrically isolated from each other by dielectric layers, and wherein the multilayered flakes are substantially aligned parallel to the first and second major surfaces such that they do not provide an electrically continuous path over a range of greater than 0.5 mm. Exemplary high frequency power inductor materials described herein are useful, for example, as a power inductor in Point of Load converters, low profile inductors for inductive—capacitive (LC) filters (e.g.

Abstract: A magnetic isolator includes a dielectric film having a layer of electrically-conductive soft magnetic material bonded thereto. The layer of electrically-conductive soft magnetic material comprises substantially coplanar electrically-conductive soft magnetic islands separated one from another by gaps. At least some of the electrically-conductive soft magnetic islands have an outer insulating oxidized layer that electrically insulates them from adjacent electrically-conductive soft magnetic islands. The gaps at least partially suppress electrical eddy current induced within the layer of soft magnetic material when in the presence of applied external magnetic field. An electronic device including the magnetic isolator and a method of making the magnetic isolator are also disclosed.

Abstract: A multilayer magnetic sheet is described which comprises a plurality of stacked magnetic component layers separated by first electrically insulating layers. Each of the plurality of magnetic component layers comprises a plurality of isolated magnetic sublayers having a magnetic layer thickness of less than one micron. The multilayer magnetic sheet has a magnetic fraction between about 5% and about 80%; a total magnetic thickness of greater than or equal to 5 microns; and a relative composite permeability of greater than about 20.

Abstract: A magnetic isolator includes a dielectric film having a layer of electrically-conductive soft magnetic material bonded thereto. The layer of electrically-conductive soft magnetic material comprises substantially coplanar electrically-conductive soft magnetic islands separated one from another by a network of interconnected gaps. The interconnected gaps are at least partially filled with a thermoset dielectric material. The network of interconnected gaps at least partially suppresses electrical eddy current induced within the layer of soft magnetic material when in the presence of applied external magnetic field. An electronic device including the magnetic isolator and a method of making the magnetic isolator are also disclosed.

Abstract: The present disclosure relates to polymer composites that include a thermoplastic polymer, network structure and a soft, ferromagnetic particulate material. The polymer composites may be used, for example, as magnetic flux field directional materials. The present invention also relates to methods of making the polymer composites, e.g. polymer composite sheets, of the present disclosure. In one embodiment, the present disclosure provides a polymer composite including a thermoplastic polymer, network structure; and a soft, ferromagnetic particulate material distributed within the thermoplastic polymer, network structure. The weight fraction of soft, ferromagnetic particulate material may be between 0.80 and 0.98, based on the total weight of the polymer composite and/or the thermoplastic polymer may have a number average molecular weight between 5×104 g/mol to 5×107 g/mol.