摘要:
For the purpose of providing an electromagnetic wave absorber capable of holding excellent performance over a long period of time, the electromagnetic wave absorber includes: a dielectric layer B including a polymer film and having a first surface and a second surface; a resistive layer A formed on the first surface of the dielectric layer B and containing indium tin oxide as a main component; and an electrically conductive layer C formed on the second surface of the dielectric layer B and having a sheet resistance lower than that of the resistive layer A, wherein the indium tin oxide in the resistive layer A contains 20 to 40 wt.% of tin oxide based on the total weight of the indium tin oxide.
摘要:
The present invention discloses a fused sheet for electromagnetic wave absorption/extinction and shielding, and for electronic equipment high heat dissipation. The fused sheet for electromagnetic wave absorption/extinction and shielding, and for electronic equipment high heat dissipation of the present invention includes a premolded graphite sheet prepared by molding a graphite substrate into a sheet form having a density in a range of 0.1-1.5 g/cm 3 and an incomplete state of crystal structure; and a porous metal sheet having a plurality of pores connected to upper and lower surfaces of the porous metal sheet, wherein the premolded graphite sheet is stacked on one surface of the porous metal sheet, and press molded to be integrally attached and combined, so as to have a density of 1.6 g/cm 3 - 6.0 g/cm 3 .
摘要:
The disclosure discloses a wide-frequency wave-absorbing metamaterial, which comprises a plurality of layers of substrates and microstructures respectively arranged on the substrates at different layers. The wave-absorbing frequency band of the wide-frequency wave-absorbing metamaterial is relatively wide. The disclosure further discloses an electronic device and a method for obtaining a wide-frequency wave-absorbing metamaterial. By using the foregoing manner, the disclosure can enable a wave-absorbing metamaterial to significantly increase a wave-absorbing bandwidth based on a relatively good electromagnetic wave absorbing effect.
摘要:
A method and apparatus for producing a radio frequency absorbing (RFA) or perfect microwave absorbing (PMA) printed circuit board (PCB) is described herein. A metamaterial layer may be applied to a low dielectric substrate. Resistive and capacitive components may then be added to the metamaterial layer. The metamaterial layer may then be formed into an RFA or PMA PCB, which may comprise a multi-layered assembly for absorption of electromagnetic radiation in a targeted frequency range such as the microwave frequency range in the PCB.
摘要:
The present invention relates to an electromagnetic interference suppression sheet comprising a conductive layer comprising a conductive metal filler and having a surface electrical resistance of 100 to 5000 Ω/□, and a magnetic layer comprising a magnetic material mixed therein and having a real part µ ' of a magnetic permeability of 3 to 45 as measured at 100 MHz which is laminated on the conductive layer. The electromagnetic interference suppression sheet of the present invention is suitable for high-density packaging of electronic devices, and has an excellent low-pass filter characteristic in a near electromagnetic field in a wide frequency band ranging from a low frequency to a high frequency.
摘要:
The disclosure discloses a wide-frequency wave-absorbing metamaterial, which comprises a plurality of layers of substrates and microstructures respectively arranged on the substrates at different layers. The wave-absorbing frequency band of the wide-frequency wave-absorbing metamaterial is relatively wide. The disclosure further discloses an electronic device and a method for obtaining a wide-frequency wave-absorbing metamaterial. By using the foregoing manner, the disclosure can enable a wave-absorbing metamaterial to significantly increase a wave-absorbing bandwidth based on a relatively good electromagnetic wave absorbing effect.
摘要:
The present invention relates to a multilayer casing device (I) for attenuating electromagnetic waves. Said device is made of at least one textile material and at least one metal material and is characterized in that it is made up of a stack provided with at least, consecutively from the inside to the outside: a first diamagnetic metal material layer (2) at least partially made of copper; a second textile layer (3) at least partially made of wool or cotton; a third layer (4) made of a ferromagnetic material; and a fourth textile layer (5) at least partially made of wool and cotton. Said device is also characterized in that it is made up of a complementary stack of identical layers (3, 4, 5) extending symmetrically in relation to said first copper layer (2).
摘要:
The subject of this invention is a textile product attenuating electromagnetic field and a device for manufacturing textile materials attenuating electromagnetic field by coating a textile material with coatings deposited by magnetron sputtering method, whereby the textile materials are intended for applications such as electromagnetic shields, used especially in hospitals, office blocks, dwelling houses and laboratories, and which may be used for manufacturing of wallpaper, curtains, blinds and roller blinds. The textile product has at least one layer (L1, L2, L3, L4) of metal and/or at least one layer (L1, L2, L3, L4) of metal oxide with the thickness below few micrometers, formula I, deposited on a substrate (S) alternately, where the number of the (L1, L2, L3, L4) layers depends on the coefficient of shielding efficiency of electromagnetic field by the textile product. Inside a vacuum chamber, above the conveying device fixed to the base (10) there is a three-layer anode in a shape of a part of cylindrical surface, mounted with insulators (6) on the base (10) fixed to the chamber housing. The anode, on the side of the target (1 1), has a sliding layer (5) and under this layer, a layer of supporting structure (4) while on the bottom, there is a temperature stabilizer (3) to which a cooling system made of a set of pipes (2) transporting the cooling medium is mounted. Above the three-layer anode there is a magnetron sputtering device (1) equipped with a rectangular target (11), connected to a supplier (27) which is coupled through a control system (26) with a computer unit (25). The control system (26) is connected through a valve controller (28) with a control valve (29), an instrument for measuring the length of a coated fabric (30), and simultaneously, through a engine velocity governor (31) with a motor (32) driving a two-way drive (9) of the conveying device.
摘要:
Disclosed are exemplary embodiments of electrically conductive porous material assemblies. Also disclosed are exemplary methods of making or producing electrically conductive porous material assemblies. In an exemplary embodiment, an electrically conductive porous material assembly generally includes an electrically conductive porous material and a first layer of electrically conductive porous fabric. A first layer of adhesive is between the first layer of electrically conductive porous fabric and the electrically conductive porous material.