Zinc & Galvanized Steel RF Shielding Characteristics
Zinc-coated RF steel plates have a variety of uses. Their purpose is to block magnetic, electric and radio wave signals from reaching behind the barrier. There are many benefits to using these shields in a large number of industries from mechanical to household. The coatings help block the signals from reaching a certain area, which is necessary for many machines and processes.
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Shielding Power
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RF shielding is designed to block both electromagnetic waves and radio waves. The shielding power varies by the manufacture, but most zinc-coated steel can block nearly all radio and electrical waves. The coated steel can block waves in anywhere in the range from 10 kilohertz to 40 gigahertz. Most radio and electrical waves do not project beyond these wavelengths. The RF shielding provides a nearly impenetrable barrier for the waves.
Use
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The purpose of RF shielding is to block a room from receiving electric or radio signals from other locations. These rooms are used for electrical testing, the construction of electromagnetic machinery and equipment and for security purposes. RF shielding is used in a variety of industries, from factories, to the engineering industry to the military. These shields can vary in size from just a few feet to over several thousand square feet.
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Coatings
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The coatings on RF shields vary. The most common coating is zinc, but other materials are used as well. Copper, nickel and metallic ink can also be used to coat the metal. The coatings are applied with a thickness between 20 and 50 micrometers thick. This thickness ensures the waves cannot penetrate through the coating. The main purpose of the coating is to cover the surface metal in molecules so tightly packed together that the electrical or magnetic waves cannot penetrate the metal.
Variations
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In addition to shielding entire rooms with the sheet metal, the coated steel also has other uses. The shielding is also used in microwaves, cables and computers. Signal filters can also use the shielded metal. Some buildings also require shielding ceilings or floors. Other variations of the metal include mesh or foam barriers with similar wave-blocking properties.
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