28017008

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Radio frequency interference (RFI) and electromagnetic interference (EMI) are both unwanted electronic signals that can cause damage to electronic prototypes, instrument and communication systems. RFI is caused by local energy sources such as electric motors, fluorescent lights, computers and cell phones, while EMI is created by external energy sources such as radiation from satellites, radio transmissions and lightning. In order to protect electronic systems from these types of interference, shielding and absorbing materials are required. 28017008 provides several popular shielding and absorbing materials, which can be used for a variety of applications and working principles.

How Shielding Works

Shielding is a type of barrier that is placed between the source of interference and the sensitive electronics to prevent outside noise from entering or escaping the electronic device. Shielding materials are used to block unwanted signals by absorbing, diverting, or reflecting unwanted frequencies. This can be accomplished by wrapping the sensitive components in a material such as an aluminium foil or a metal mesh, or by making use of more sophisticated materials such as conductive plastic foams or absorbent material. Shielding materials can also be used to reduce the amount of radiated energy from the device, or to reduce the amount of electrostatic energy that can be induced from the environment.

Examples of Shielding

28017008 offers several popular shielding materials for a variety of shielding applications. These include:

• Conductive plastic foams: These foams are made from materials such as carbon, copper, and stainless steel that have been compressed in a way that allows them to selectively absorb interfering signals. These foams can be used to shield cables, printed circuit boards, and other sensitive components.
• Conductive gaskets: These are made up of a combination of metal and e-shielding materials that are used to create a barrier between the sensitive components and the external environment. They can be used to block microwave radiation, radio frequency interference, and electrostatic discharge.
• Metal meshes: These are made from a combination of aluminum, brass, copper, and stainless steel. They are used to provide a physical barrier and absorb interfering frequencies.
• Absorbing material: These are designed to act as an energy sponge, absorbing incoming signals and dissipating them in the form of heat. Examples of this type of material include carbon-loaded thermoplastic, absorber foam, rubber, and foam-backed absorber sheets.

How Absorption Works

Absorption is the process of using materials to reduce the intensity of an interference signal. This is accomplished by using absorbent material that can absorb incoming frequencies. Absorbing material is designed to absorb, dampen, or dissipate the incoming signals, preventing them from entering the system. Common examples of absorbing materials include double-sided conductive foam and carbon-loaded thermoplastic. These materials are designed to absorb a wide range of frequencies.

Uses of Absorbing Materials

Absorbing materials are useful in a variety of applications, including shielding cables and wires from interference, reducing the amount of electrostatic energy present in the environment, and protecting sensitive electronic components. Absorbing materials can also be used to reduce the intensity of incoming signals, reducing the amount of noise and improving system performance. Popular absorbing materials include double-sided conductive foams, fiber-filled foams, and high frequency absorbers.

Conclusion

Shielding and absorbing materials can be used for a variety of applications, including shielding cables and wires from interference, reducing the amount of electrostatic energy present in the environment, reducing the intensity of incoming signals, and protecting sensitive electronics. 28017008 provides several popular shielding and absorbing materials, which are designed to provide a barrier between interference and sensitive components, as well as absorb incoming interference for improved system performance.

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