An anechoic chamber is usually used for radiation testing, and the testing site is divided into three types:Full anechoic chamber, semi anechoic chamberAnd open field. The radiation tests conducted in these three testing sites can generally be considered to comply with the propagation law of electromagnetic waves in free space.
An EMC anechoic chamber is a device used to test and verify the electromagnetic compatibility (EMC) of electronic equipment within a specific frequency band. Absorbing materials are an important component of EMC anechoic chambers, whose main function is to absorb incident electromagnetic energy into soil or other absorbing materials to reduce electromagnetic interference of equipment in specific frequency bands.
The following is a detailed introduction to EMC anechoic chamber absorbing materials:
It is mainly used to test and verify the EMC performance of electronic devices in specific frequency bands, such as anti electromagnetic interference, signal integrity, etc.
Absorbing material:
EMC anechoic chamber absorbing materialIt refers to a material used for absorbing electromagnetic wave energy. It is mainly divided into two types, namely absorbing steel plate and absorbing plastic.
Absorbing steel plate is a commonly used absorbing material in EMC anechoic chambers. It is made of high-quality metal materials and has high electromagnetic shielding and reflectivity. It is usually used to manufacture the outer shell and internal space of EMI darkrooms to shield external electromagnetic interference.
Absorbing plastic is an artificial material typically composed of organic and inorganic substances, with high electromagnetic shielding and reflectivity. It should be noted that absorbing materials may encounter some problems during use, such as surface corrosion, wrinkling, etc., so it is necessary to inspect and test them before use.
The technical key points of EMC anechoic chamber absorbing materials include the following aspects:
Electromagnetic shielding: EMC anechoic chamber absorbing materials need to be able to shield incident electromagnetic energy to reduce electromagnetic interference of equipment in specific frequency bands. Both absorbing steel plates and absorbing plastics have good electromagnetic shielding properties, which can effectively shield incident electromagnetic energy.
Reflectivity: Absorbing steel plates and absorbing plastics need to have high reflectivity to reduce the loss of incident electromagnetic energy during the absorption process. High reflectivity can improve absorption efficiency, thereby increasing absorption capacity.
Material quality: The quality of absorbing materials is also an important factor. Materials with smooth and flawless surfaces should be selected to ensure the stability of absorption performance.
Processing technology: The processing technology of absorbing materials is also an important factor. Appropriate processing techniques should be selected to ensure that the shape, size, and surface quality of the material meet the requirements.
Quality control: Finally, quality control should be carried out on the absorbing materials to ensure that they meet the requirements of EMC anechoic chambers and can effectively shield electromagnetic interference.
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