It is formed by conductive material or by a mesh of similar materials. "A Faraday cage or Faraday shield is an enclosure used to block electric fields. Simply put, the more genuine a carbon fiber case is, the worse it is to your phone's cellular radio reception.Īlternatively, I can explain this by referring to Faraday or a Faraday cage (Electrostatic Shielding). Therefore, as radio waves are electromagnetic, carbon fiber absorbs those waves very well.Īnd the larger the conductive capacity of carbon fibers, the more the incoming radio signal is attenuated. On the other hand, it absorbs electricity very well. It's displaying the properties of both a metal and a nonmetal.Ĭarbon fiber is a conductor of electricity and magnetism. It conducts electricity so well because of the mobility of the electrons in the outer valence shells. ![]() ![]() The atomic structure of carbon fiber is very similar to graphite, with sheets of carbon atoms arranged in a regular hexagonal pattern. The material is comprised of at least 95% carbon. But, in truth, this turns out to be the wrong decision when it comes to signal reception.Ĭonductivity is not the sole reason why carbon fiber is terrible for phone cases. Ironically, however, metal and carbon fiber are two of the most wanted materials for buyers and manufacturers, mainly because of their look and durability. In other words, both materials are often the fundamental reason why your phone's signal is lower than if you took the case off. They can often affect your signal strength in a similar way. Carbon fiber phone cases reduce the average cellular signal by as much as 40%- 60%, and aluminum and other similar metal phone cases don't do much better. ![]() Amongst some of the most common materials used for phone cases, aluminum and carbon fiber have been proven to dramatically reduce your phone's cellular signal reception via Radio Frequency Interference (RFI).
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