37results about How to "Good electromagnetic shielding properties" patented technology

A bundled flexible flat circuit cable includes a flexible substrate that forms at least one cluster section having an end forming at least one first connection section and an opposite end forming at least one second connection section. Both the first and second connection sections or one of the first and second connection sections form a stack structure. The flexible substrate can be of a structure of single-sided or double-sided substrate and may additionally include an electromagnetic shielding layer. A bundling structure is provided to bundle the cluster section at a predetermined location to form a bundled structure. The bundling structure can be made of a shielding material, an insulation material, or a combination of shielding material and insulation material.

A bundled flexible flat circuit cable includes a flexible substrate that forms at least one cluster section having an end forming at least one first connection section and an opposite end forming at least one second connection section. Both the first and second connection sections or one of the first and second connection sections form a stack structure. The flexible substrate can be of a structure of single-sided or double-sided substrate and may additionally include an electromagnetic shielding layer. A bundling structure is provided to bundle the cluster section at a predetermined location to form a bundled structure. The bundling structure can be made of a shielding material, an insulation material, or a combination of shielding material and insulation material.

A small infrared sensor has a wide infrared light-receiving area (viewing angle), high electromagnetic shielding characteristics, and excellent electromagnetic-wave resistance characteristics. In the infrared sensor, supporting portions are disposed at four corners of a substantially rectangular opening in a package. The supporting portions support an optical filter, disposed so as to cover the opening, at positions that are lower than an upper end of an inner peripheral wall defining the opening. While the optical filter is supported by the supporting portions as a result of inserting a portion of a surface side of the optical filter facing the supporting portions into the opening, the optical filter is secured to the package. The optical filter and the package are joined and secured, and electrically connected to each other through a conductive adhesive.

The invention discloses a flexible composite material with high electromagnetic shielding performance and a preparation method thereof, comprising: obtaining a polymer solution; adding liquid metal into the polymer solution, and obtaining a mixed emulsion through mechanical stirring; casting the mixed emulsion to obtain a mixed emulsion Liquid metal particle / polymer composite material; the obtained material is equibiaxially stretched, fixed and heat-treated, and the stretched state is retained to obtain a liquid metal flake / polymer composite material; a layer of mixed emulsion is cast on the upper surface of the obtained material, And lamination treatment is carried out; casting and lamination are repeated, and the obtained material is then subjected to hot pressing treatment and heating curing to obtain a flexible composite material with high electromagnetic shielding performance. The flexible composite material with high electromagnetic shielding performance and the preparation method thereof realize the combination of flexibility and high electromagnetic shielding performance, the electromagnetic shielding performance of the prepared material is isotropic, and has excellent flexibility and stretchability, and has a wide range of application prospects.

The invention discloses a damp heat resistant electromagnetic shielding film, a composite material, a preparation method and an application thereof. The heat and humidity resistant electromagnetic shielding film includes a conductive composite carbon nanotube film, which includes a carbon nanotube film layer, a conductive substance / carbon nanotube composite structure and a conductive layer arranged in sequence along a set direction. The preparation method includes: depositing a conductive layer on the surface of the carbon nanotube film, and forming a composite structure of conductive material / carbon nanotube between the carbon nanotube film and the conductive layer by controlling the structure of the carbon nanotube film and the deposition parameters of the conductive layer, A conductive composite carbon nanotube film was obtained. The present invention achieves the unity of electromagnetic shielding performance, mechanical performance and environmental stability of the composite film through compounding with the carbon nanotube film layer and the isolation of the protective layer to water and oxygen; Combination of structure and function integrated composite materials with excellent mechanical properties, high electromagnetic shielding performance, and resistance to hot and humid environments.

The application provides a power transmission system, comprising: a power supply source and a transmitting electrode which are arranged on a ground, a receiving electrode arranged at the bottom of a vehicle, and a power conversion apparatus and a power-consuming appliance which are arranged on the vehicle, wherein the receiving electrode is a curved electrode; the curved surface of the receiving electrode has downward radian; the power supply source is connected with the transmitting electrode; the transmitting electrode and the receiving electrode form an interactive magnetic field under theaction of alternating current; the power conversion apparatus is connected with the receiving electrode and the power-consuming appliance. The power transmission system according to the technical scheme has high power transmission efficiency and low electromagnetic radiation influence.

An ultrathin coaxial cable comprises: inside conductor; dielectric layer at periphery of the inside conductor, comprising polyamide and polymer alloy of ABS resin; film shielding layer at the periphery of the dielectirc layer; protecting coating layer at the periphery of the film shielding layer. The invention also provides a method for manufacturing the ultrathin coaxial cable, comprising the following steps: forming the dielectirc layer including polymer alloy at periphery of the inside conductor through extruding; etching the dielectric layer's surface with hydrochloric acid, phosphoric acid, sulphuric acid or organic acid; treating the periphery of the etched dielectirc layer in order to supply catalyzer; activating the catalyzer; forming the film shielding layer at the periphery of the dielectirc layer by chemical plating or the combination of chemical plating and electric plating, the said dielectirc layer has activated catalyzer; forming protecting coating layer at the periphery of the film shielding layer.

A graphene / pyrolytic carbon / silicon carbide electromagnetic shielding composite material and a preparation method thereof provided by the present invention include the following steps: step 1, preparing a G sponge three-dimensional skeleton; The three-dimensional skeleton of the G sponge obtained in PyC and SiC was alternately impregnated and cracked in the order of PyC and SiC until it was completely densified to obtain G / (PyC‑SiC) n Electromagnetic shielding composite material; the multi-layered G / (PyC-SiC)n composite material prepared by the invention not only has the ultra-high specific strength of high-temperature structural materials, but also has both ultra-strong electromagnetic shielding properties and ultra-light density. The total electromagnetic shielding effectiveness (SET) is above 40dB, and it is expected to be used in the structural components of countermeasures.