20S-CBSA-0.75X3.5X0.2

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RF Shields

RF shields have various applications in the field of communications, radar devices, amplifiers, and electronics. One of the more common type of RF shields is the 20S-CBSA-0.75X3.5X0.2. This type of RF shield has a few parameters that define it. They are the air gap, the number of sides or layers (piece count), the cross-sectional area, and the copper thickness.

Application Fields

The 20S-CBSA-0.75X3.5X0.2 RF shield is primarily used in the area of telecommunications, video broadcast, defense, and aerospace. It is commonly used for frequencies below 1GHz and is suitable for both low- and high-power applications. It can protect from environmental thermal stresses, electronic pollution, RF interference, and electromagnetic interference. This type of RF shield is also used to reduce unwanted signal attenuation, improve signal quality, and match impedance across unbalanced lines.

Working Principle

The 20S-CBSA-0.75X3.5X0.2 RF shield is composed of multiple layers of copper sheets, which are arranged in crescent-patterns on a substrate. The gap between the copper layers form an air gap which provides thermal dissipation and reduces thermal impedance. This helps to improve the overall performance and heat dissipation of the RF shield. The copper sheets also act as a Faraday cage, which can shield against outside EM and RF interference. The air gap also improves the shielding effectiveness by allowing current to be conducted along the sheet’s surface while still maintaining an electrical resistance through the air gap. This helps to reduce the probability of RF and EM interference entering the system and causing damage.

The 20S-CBSA-0.75X3.5X0.2 RF shield is also designed to be extremely flexible, allowing it to conform to the mechanical structure of the device it is installed onto. This flexibility, combined with its thermal dissipation and Faraday cage properties, make it an ideal RF shield for various applications.

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