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.

A device and method for absorbing electromagnetic waves can include a honeycomb sheet formed by a plurality of interconnected hexagon cells arranged in rows. The hexagon cells are made up of sidewalls, each sidewall formed by two surfaces that converge at a top of the sidewall and diverge from the top to a bottom of the sidewall such that a thickness of the sidewalls increases from top to bottom and an angle forms between the two surfaces at the top of the sidewall. In an example, the angle is about 8 degrees. The honeycomb sheet can be coated with a magnetic, composite coating to increase electromagnetic shielding. An example coating includes magnetic multi-granular nanoclusters (MGNC) and multi-walled carbon nanotubes (MWCNT). A base layer can be attached to the honeycomb sheet for mechanical stability and additional absorption. The device is suitable for radar absorbing materials (RAM) for aerospace and military applications.

In a method for reducing the amount of ambient radio frequency electromagnetic and pulsating magnetic fields (“electrosmog”), resonance circuit units placed in a predetermined environment are energized by radio frequency electromagnetic and pulsating magnetic field energy transmitted to the resonance circuits by an electromagnetically connected antenna, at least a portion of energy is consumed as resonance circuit loss, reducing the amount of the ambient fields. An apparatus implementing the method comprises passive resonance circuits formed by an antenna comprising logarithmic spiral coils with identical or different pitches and passive resonance circuits formed by opposite logarithmic spiral coil panels, the resonance circuits are connected to each other and to the antenna by electrically conductive spacers, a shielding metal plate connected to ground potential is arranged adjacent to the antenna, latter is coaxial with the resonance circuit panels, which are also connected to each other via a supply line.

In a method for reducing the amount of ambient radio frequency electromagnetic and pulsating magnetic fields (“electrosmog”), resonance circuit units placed in a predetermined environment are energized by radio frequency electromagnetic and pulsating magnetic field energy transmitted to the resonance circuits by an electromagnetically connected antenna, at least a portion of energy is consumed as resonance circuit loss, reducing the amount of the ambient fields. An apparatus implementing the method comprises passive resonance circuits formed by an antenna comprising logarithmic spiral coils with identical or different pitches and passive resonance circuits formed by opposite logarithmic spiral coil panels, the resonance circuits are connected to each other and to the antenna by electrically conductive spacers, a shielding metal plate connected to ground potential is arranged adjacent to the antenna, latter is coaxial with the resonance circuit panels, which are also connected to each other via a supply line.

A method for shielding components includes the steps of providing a component and applying at least one coating region, designed to shield from a magnetic and/or an electrical field, to the component by a thermal and/or kinetic spraying method such that a first arrangement space is shielded from a second arrangement space.

Provided is a method for making a composite structure with exposed conductive fibers. The exposed conductive fibers can be used for static dissipation. In the present method, a liquid, gum, gel, or impermeable film mask is applied to the conductive fiber material. The mask functions to prevent infiltration of curable liquid resin into the conductive fiber material. The masked conductive fiber material is incorporated into the composite structure, along with structural fiber material. The liquid resin is cured. The mask material and cured resin are removed from the masked areas, thereby exposing the conductive fiber material. The exposed conductive fiber material can collect and drain electrostatic charges. The present method can be used to make storage tanks and other objects that require electrostatic charge dissipation.

Provided is a portable electronic device with an embedded electric shock protection function. A portable electronic device with an embedded electric shock protection function according to an exemplary embodiment of the present invention comprises: a circuit board; a camera module mounted on the circuit board; a conductive cover disposed to cover a part of an upper side of the camera module; a conductive connecting part mounted on the circuit board and configured to come into electrical contact with the conductive cover; and an electric shock protection element mounted on the circuit board to be connected in series to the conductive connecting part and configured to pass static electricity introduced from the conductive cover and block a leakage current of an external power source introduced into a ground of the circuit board.

The outer layer is peeled exactly a predetermined length from the end portion of the electromagnetic shielding tube. That is, the metal layer is exposed exactly a predetermined range at the end portion of the electromagnetic shielding tube. A flexible conductor is connected to the exposed metal layer. A separated portion is provided in the inner layer. The separated portion is formed along the length direction of the electromagnetic shielding tube. Additionally, a depth of the separated portion is the same value as the thickness of the inner layer. As such, the inner surface of the metal layer is exposed at the separated portion. It is preferable that the separated portion be formed at a plurality of locations in the circumferential direction. The inner layer is divided into a plurality of sections in the circumferential direction by the separated portion. The separated portion is a terminal processed portion, which mitigates the effects caused by differences in the physical properties of the inner layer and the metal layer.

According to various aspects, exemplary embodiments are disclosed of board level shields. In an exemplary embodiment, a board level shield generally includes a cover (or lid) and a fence (or frame or base). The cover is attachable to the fence in a plurality of different positions.

A method for fabricating polymeric sheets containing microwires includes encapsulating at least a portion of individual lengths of a plurality of microwires in a non-conductive polymeric sheet while the microwires are attached to the substrate. The microwires are then detached from the substrate without removing the microwires from the polymeric sheet. The detaching step forms a separated polymeric sheet containing the detached microwires. Individual detached microwires of the plurality are approximately perpendicular to the separated polymeric sheet. A microwire array device includes a non-conductive polymeric sheet and a plurality of microwires. Individual microwires of the plurality have an independent length at least partially encapsulated by the polymeric sheet, are approximately perpendicular to the polymeric sheet, and contain magnetic ferrite.