34403 RF/IF and RFID

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Radio Frequency Interference (RFI) and Electromagnetic Interference (EMI) shielding and absorbing materials are used to protect both electronic and non-electronic components from the effects of RFI/EMI. This type of protection ranges from protection of large electronic systems to the shielding of small components and devices from interference. As such, shielding and absorbing materials are used in a variety of applications(34403 Application Field and Working Principle).

The application of shielding and absorbing materials depends on the particular situation and the type of RFI/EMI protection required. This type of protection can be used for a range of products, including communications systems, industrial equipment, medical equipment, consumer electronics and military systems. Shielding materials typically consist of metallic absorbers or semi-conducting materials, while absorbing materials usually contain porous materials. In general, shielding materials are designed to absorb or deflect electromagnetic radiation by reflecting incident electromagnetic waves and re-radiating any absorbed energy, while absorbing materials are intended to absorb electromagnetic radiation.

The basic principle of shielding and absorbing materials is to reduce RFI/EMI by attenuating, absorbing, deflecting, or reflecting electromagnetic waves. The shielding material is designed to create an electrical or magnetic barrier between the source of the interfering signal and the protected device. Depending on the application, a variety of materials can be used to achieve the desired level of shielding. Non-metallic materials such as plastics, ceramics and composites can also be used for shielding, as they can absorb and deflect electromagnetic radiation.

The effectiveness of a shielding/absorbing material is measured in terms of its ability to attenuate or absorb electromagnetic waves. Shielding effectiveness is usually stated as either a transmission loss or an absorption coefficient, both of which are expressed in dB. Transmission loss is the ratio of the incident and reflected waves, while absorption coefficient is the ratio of the incident and absorbed waves. Both metrics are used in combination to determine the overall shielding effectiveness of a material.

In some applications, combining shielding and absorbing materials is beneficial. The use of both materials can provide more comprehensive protection against RFI/ EMI. Combining a reflective shielding material with a porous absorbing material can increase the level of protection, while also reducing the amount of space required for installation.

Shielding and absorbing materials are an increasingly important aspect of the design of electronic and non-electronic devices. They offer a reliable means of protecting electronic and non-electronic components from the effects of RFI/EMI, and can be used in a variety of applications. By selecting the appropriate material for the application, engineers and designers can ensure that their products are adequately protected from interference and remain reliable and functional.

The specific data is subject to PDF, and the above content is for reference