Paint can kill your cell phone signal
23 Jul 2006 | Other | 9 comments
It might not be as fun as a jammer, but this thing will surly keep those annoying people from talking while in a movie theater. NaturalNano's Radio-Frequency Shielding Technology can be used in paint and applied to walls. As soon as you enter a room that has this kind of paint, your cell phone signal will instantly die.
Here's how it works:
1. Halloysite nanotubes coated or loaded with copper may be used in paint applied to walls to passively block specific radio frequency ranges.
2. Two-way radio-frequency transmissions from cell phones, WiFi, and other electronic devices may be blocked.
3. Using a complementary technology licensed from AMBIT Corporation, building managers may selectively override the blocking to allow the use of two-way devices in a room or building. An indoor antenna picks up cell-phone or other signals and sends them to an external antenna through an electronic filter. A facility manager can enable transmissions at specific frequencies or for specific uses. For example, police, fire and other emergency communication calls could go through.
4. An outdoor antenna transmits and receives the cell-phone (or other) signals. The antenna may also improve reception for buildings in marginal coverage areas.