|The Mammut radar system|
One of the technology advances being deployed with 5G is the use of phased-array antenna design, allowing the 5G base stations to steer and direct the signal towards your handset. However this technology is not new. In fact the first Phased Array radar system was the FuMG 41/42 Mammut radar, developed and deployed by the German GEMA company late in World War 2. Interestingly, this radar system is featured in Saving Private Ryan. Here's some stills from the movie showing one of the 'hoarding' radar systems.
Prof Dr Hans Eric Hollmann
More recently, the PAVE PAWS early warning system deployed on the east and west coasts of the USA in the '70s and '80s has been cause for concern of health risks amongst local residents, with Cape Cod residents concerned the system may contribute to a 15% increased incidence of certain cancers in the area.