A radiation-shielding attenuation structure and method of forming the attenuation structure, wherein the attenuation structure is made by additively manufacturing a concrete material that includes one or more attenuation dopants configured to enhance the radiation shielding of the concrete material. The one or more attenuation dopants may be configured in the concrete material to attenuate one or more types of radiation, such as electromagnetic radiation, gamma radiation, X-ray radiation, or neutron radiation. The attenuation structure formed by the concrete material may be additively manufactured on-site according to a model that has already been pre-certified for safe or secure use, thereby providing a repeatable and reproducible process that can reduce lead times and fabrication costs. The attenuation structure may be easily modified during the additive manufacturing process to have different concrete mixtures with different attenuation characteristics, which increases the tailorability and flexibility in design of the attenuation structure.

Disclosed herein is a method for constructing a joint between thin flexible sheets of electromagnetic shielding material. The method includes adhering first sides of multiple first sheets of shielding material to a wall and adhering first sides of multiple second sheets of shielding material to second sides of the multiple first sheets of shielding material. A conductive adhesive or a conductive double-sided adhesive tape may be applied to the first side of each of the first sheets of shielding material and the second sheets of shielding material, the first sheets of shielding material may be arranged to abut each other along at least one first seam, and the second sheets of shielding material may be arranged to abut each other along at least one second seam.

The present invention provides an electricity storage unit in which the influence of noise from a circuit portion can be suppressed, and the circuit portion and a power storage element can be consolidated. The electricity storage unit includes a circuit portion on which an electronic component is mounted, power storage elements, and a holding member that holds the power storage elements. The holding member includes an electrically conductive shield wall portion between the circuit portion and the power storage elements, and the shield wall portion shields noise generated by the circuit portion. The electricity storage unit may further have an electrically conductive heat dissipation member that dissipates heat from the circuit portion.

An ADA compliant shielded door is disclosed. According to one aspect, a door is configured to create a radio frequency (RF) seal when the door is sealed so that RF energy is restricting from passing through a gap between an outer periphery of the door and a door frame when the door is sealed. The door includes: at least one knife edge along at least part of the outer periphery of the door, each knife edge configured to project into a channel of a door frame in a direction parallel to a face of the door when the door is sealed. The door also includes at least one contact element along a length of a knife edge, the at least one contact element being configured to make electrical contact with a channel wall of a channel of the door frame when the knife edge projects into the channel.

According to various aspects, exemplary embodiments are disclosed of board level shields with virtual grounding capability. In an exemplary embodiment, a board level shield includes one or more resonators configured to be operable for virtually connecting the board level shield to a ground plane or a shielding surface. Also disclosed are exemplary embodiments of methods relating to making board level shields having virtual grounding capability. Additionally, exemplary embodiments are disclosed of methods relating to providing shielding for one or more components on a substrate by using a board level shield having virtual grounding capability. Further exemplary embodiments are disclosed of methods relating to making system in package (SiP) or system on chip (SoC) shielded modules and methods relating to providing shielding for one or more components of SiP or SoC module.

Flame-resistant paper for radio wave absorber members includes 40 to 70% by mass of pulp; 5 to 50% by mass of aluminum hydroxide powder; and 3 to 15% by mass of a flame retardant consisting of a polyborate, wherein the flame retardant consisting of a polyborate is contained in an amount of 7 to 25% by mass relative to the amount of the pulp.

A board includes a first magnetic conductive plate and a second magnetic conductive plate. The first magnetic conductive plate has a first magnetic conductive direction. The second magnetic conductive plate overlaps with the first magnetic conductive plate. The second magnetic conductive plate has a second magnetic conductive direction. The first magnetic conductive direction and the second magnetic conductive direction cross.

Door sealing systems for providing an RF seal to a door to an enclosure such as an anechoic chamber are disclosed. According to one aspect, a door sealing system includes a door having an outer periphery and a plurality of extendable and retractable knife edges along at least a portion of the outer periphery. The door sealing system includes a door frame having a plurality of channels corresponding to the plurality of knife edges, each knife edge projecting outward in a direction parallel to a face of the door and into the corresponding channels when the door is in a sealed position. Further, the door sealing system may include channels in the door frame along which knife edges of the door frame move.

The present invention provides an infrared sauna room with a low electric field and low electromagnetic wave radiation comprising a room body, heating plates with a low electric field and low electromagnetic wave radiation and shielding lines, wherein a plurality of heating plates with a low electric field and low electromagnetic wave radiation are distributed in the room body; the first insulating layer has concave points or/and convex points; and the shielding line comprises a stranded power wire, an electric field absorbing shielding layer and a wire insulating layer. Through the above-mentioned manner, the infrared sauna room with a low electric field and low electromagnetic wave radiation can significantly reduce electromagnetic wave radiation and electric field radiation for sauna rooms.

A method according to one embodiment includes securing a first plurality of conductive sheets to a surface, applying a conductive tape to a first plurality of joints between conductive sheets of the first plurality of conductive sheets, and securing a second plurality of conductive sheets to the first plurality of conductive sheets without fully penetrating the first plurality of conductive sheets. In such an embodiment, each of a second plurality of joints between conductive sheets of the second plurality of conductive sheets is offset relative to the first plurality of joints.