27045182

Series:	ECCOSORB®
Part Status:	Active
Type:	Absorbing Sheet
Shape:	Square
Length:	12.000" (304.80mm)
Width:	12.000" (304.80mm)
Thickness - Overall:	0.125" (3.18mm)
Operating Temperature:	--
Adhesive:	--
Material:	--

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Introduction to RFI and EMI - Shielding and Absorbing Materials

Radio frequency interference (RFI) and electromagnetic interference (EMI) are two of the most common types of electromagnetic disturbances, and are often caused by improperly designed, installed, or grounded equipment or materials. By using proper shielding and absorbing materials, these disturbances can be eliminated or reduced, allowing more efficient and reliable operation of electronic equipment. In this article, we will discuss the 27045182 application field and working principle of shielding and absorbing materials used in RFI and EMI control.

Types of Shielding and Absorbing Materials

Several different materials can be used for RFI and EMI shielding and absorption. Some of the most commonly used materials include conductive metals, such as copper, silver, and aluminum; conductive composites; and magnetically permeable materials, such as ferrites. In addition, dielectric materials such as plastic, rubber, and PTFE can also be used for electromagnetic absorption.

Conductive Metals

Conductive metals are the most widely used materials for electromagnetic shielding. These materials are generally made of pure or lightly doped copper, silver, or aluminum. Due to their high electrical conductivity, these metals are effective at reflecting and dissipating electromagnetic energy, and can be formed into specially designed shapes for better shielding.

Conductive Composites

Conductive composites are a combination of a conductive filler material, such as carbon fibers, and a non-conductive matrix material, such as plastic. These materials offer several advantages over conductive metals, such as increased flexibility and lower cost. The matrix material can also be specially designed to provide additional shielding. For example, some composite materials can be designed to be highly reflective to reduce the amount of electromagnetic energy that passes through.

Magnetically Permeable Materials

Magnetically permeable materials are composed of ferrite, which is made up of iron oxide. These materials are commonly used in electronics because of their ability to absorb and reflect electromagnetic energy. Magnetically permeable materials are often used in applications such as antennas, wavelength converters, and waveguide components.

Dielectric Materials

Dielectric materials are non-conductive materials that can be used for electromagnetic absorption. Materials such as plastics, rubber, and PTFE are commonly used for this purpose. Dielectric materials have the advantage of being less expensive than the other materials discussed here, but they are not as efficient at reflecting and dissipating electromagnetic energy as most of the other materials.

27045182 Application Field and Working Principle

The 27045182 application field is wide, with the shielding and absorbing materials being used in a variety of industries, including automotive, aerospace, rail, communications, medical, and military. These materials are used to control the radiation from various electronic devices, including cell phones, radios, televisions, and computers. The primary functions of the materials are to absorb, reflect, or dissipate the electromagnetic energy generated by the device in order to reduce or eliminate the interference it may cause. The working principle of these materials is fairly straightforward. For example, conductive metals are able to absorb and reflect electromagnetic energy, while dielectric materials are able to absorb it. The higher the conductivity of the material, the better it is able to absorb and reflect the energy. Magnetically permeable materials, such as ferrite, are able to absorb more energy than the other materials, and are especially effective at reflecting low-frequency energy.

Conclusion

Shielding and absorbing materials are essential components of any RFI and EMI control strategy. By selecting the appropriate materials for the application, these materials can be used to effectively reduce or eliminate electromagnetic interference and improve the operation of any electronic device. By understanding the 27045182 application field and working principle of these materials, engineers can ensure that their systems are designed, installed, and maintained properly.

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