The Telecom Infra Project performed testing last year specifically looking at penetration losses in indoor environments at 28 GHz and 60 GHz. TIP’s testing gives some insights into the challenge of achieving outdoor-in coverage for 5G at millimeter-wave frequencies, but also paints an intriguing picture of the spectrum’s coverage capabilities within the indoor environment.
Part of TIP’s testing was meant to mimic an outdoor-in scenario and assess the path loss caused by low-emissivity, double-paned glass. That glass was meant to represent the most “lossy” glass that would commonly be encountered as a barrier between outdoors and indoors, and it did have significant impacts to the signals.
