skyddsväska

A skyddsväska, often translated as a protective bag or shield bag, is a type of specialized container designed to safeguard sensitive electronic devices or equipment from various forms of electromagnetic interference (EMI) and radio frequency interference (RFI). These bags are typically constructed from materials that exhibit high conductivity, such as fine metal mesh or specialized conductive fabrics, which effectively act as a Faraday cage.

The primary function of a skyddsväska is to block or significantly attenuate incoming and outgoing electromagnetic signals. This is achieved by encasing the protected item within the conductive material, which redirects electromagnetic energy around the enclosure, preventing it from reaching the contents. This shielding property is crucial for protecting devices like smartphones, GPS units, RFID cards, and other electronics from unauthorized scanning, data interception, or from emitting signals that could be detected.

In practical applications, skyddsväskor are used for privacy and security purposes. They can prevent "skimming" of credit card information stored on RFID chips, block tracking signals from mobile phones, or ensure the integrity of data stored on sensitive devices by preventing external interference. The effectiveness of a skyddsväska is often measured by its shielding effectiveness, which indicates the degree to which it attenuates electromagnetic signals across a range of frequencies.