Es un tipo de armadura o blindaje metálica que involucra un objeto, evitando que sufra descargas eléctricas. El blindaje es un medio utilizado para prevenir la irradiación de señales indeseables, tanto eléctricas, magnéticas y electromagnéticas (EMI).

La irradiación de estas señales puede causar interferencia, principalmente en circuitos de telecomunicaciones o en dispositivos sensibles.

Los blindajes pueden ser eléctricos, magnéticos o electromagnéticos.

Entre los blindajes eléctricos más comunes podemos mencionar aquellos que involucran el componente con una cubierta metálica o incluso una jaula de Faraday, debidamente conectada a tierra.

Estas pantallas evitan que los campos eléctricos o las señales de alta frecuencia salgan del circuito blindado y se irradien a los circuitos vecinos.

Es importante tener en cuenta que para que un escudo de este tipo funcione, debe estar debidamente conectado a tierra.

 

Figura 1 - Una demostración de la jaula de Faraday
Figura 1 - Una demostración de la jaula de Faraday | Haga click en la imagen para ampliar |

 

En la figura 1, una persona dentro de una jaula de Faraday recibe una descarga de cientos de miles de voltios de una bobina de tesla, sin que nada le suceda.

La descarga evita a la persona pasando a través de la jaula e indo a la tierra.

 

 

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