20S-CBSA-5.5X5.75X0.2

Series:	20-CBS
Part Status:	Active
Type:	Shield, 2-Piece
Height - Overall:	0.200" (5.08mm)
Length - Overall:	5.750" (146.05mm)
Width - Overall:	5.500" (139.70mm)
Ventilation:	Non-Vented
Mounting Type:	Surface Mount

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IntroductionRF shields are commonly used in electronics for shielding and filtering out radio frequency interference, as well as protecting sensitive components from electrical and electrostatic discharge surges. This article will focus on the application fields and working principle of the 20s-CBSA-5.5x5.75x0.2 type of RF shields. MaterialsThe 20s-CBSA-5.5x5.75x0.2 RF shield construction is composed of ferromagnetic material as well as alumina and silicone impregnated dielectric material. The ferromagnetic material offers excellent shielding efficacy while the dielectric materials offer low losses and a high dielectric strength. The alumina provides a low level of capacitance which helps reduce the level of interference. Additionally, the silicone impregnate improves the dielectric properties of the shield, reducing the losses through the shield when signals pass through. Application fieldsThe 20s-CBSA-5.5x5.75x0.2 type of RF shield is mainly used in a variety of applications, such as in cellular and satellite communications, military applications, consumer electronics, RFID equipment, and medical equipment. This type of shield is able to reduce and prevent radio frequency interference from entering the system, protect against electric and electrostatic discharge, reduce losses in transmission lines, and protect sensitive components from the interference of external sources. Working principleThe working principle of the 20s CBSA-5.5x5.75x0.2 type of RF shield is based on the Faraday cage effect. This effect describes the behavior of an electric field in the presence of a conductive enclosure. The Faraday cage effect states that when a conductor is placed in an alternating electric field, electric lines of force are completely excluded from the interior of the cage, regardless of the shape of the conducting shield. The 20s-CBSA-5.5x5.75x0.2 shield is made of a metallic material which forms an enclosure for the enclosed components that blocks the electric and magnetic radiation entering from the outside. By creating this enclosed space, electric signals cannot penetrate the shield and thus the components are protected from interference from any outside sources. ConclusionIn summary, the 20s-CBSA-5.5x5.75x0.2 type of RF shield is a type of electromagnetic shield primarily used for protection of sensitive components from interference. The shield consists of ferromagnetic material along with alumina and silicone impregnated dielectric material, and works on the Faraday cage effect. These characteristics make it suitable for a variety of applications including cellular and satellite communications, military applications, consumer electronics, RFID equipment and medical equipment.

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