Windows that combine mobile reception and thermal insulation

Andreas Schüler and his research group at EPFL-LESO have developed a type of glass that offers excellent energy efficiency and lets mobile telephone signals through. By teaming up with Swiss manufacturers, they have produced innovative windows. Railway company BLS is about to install them on some of its trains in order to improve energy efficiency.

This proven and developed technology could be applied to buildings next. This is because, according to Schüler, “some glass buildings also act like Faraday cages. And as the internet of things continues to grow, there is a real interest in improving the properties of building materials that allow mobile signals through. More broadly, by making materials more frequency‐selective, we could, for example, imagine a building that lets electromagnetic waves through but blocks WiFi waves, thus enhancing corporate security.”