Although it isn’t that uncommon to have actually broadband radio protection in a single gadget, going from 0 Hz to 1000 GHz with one antenna and receiver is a bit much. However not for the US Army it seems, because they’ve developed a quantum sensor
that can cover that range. The technology uses Rydberg atoms, which are atoms with a highly thrilled valence electron. They have actually been utilized for a variety of sensing applications before, such as checking out the cosmic microwave background radiation. However, until the Army’s work there has actually been no quantitative analysis of utilizing them for wide-spectrum interactions.
If you wish to read more about Rydberg atoms, [Dan Maloney] covered that in 2015. The basic concept is that one laser beam thrills an atom to the Rydberg state and another laser probes the state of the atom. It appears the Army utilized a single split beam for both tasks with a plan of modulators.
The size of the Rydberg sensing unit was about a centimeter and the experiments compared the level of sensitivity to other sensing units of similar size. Prior to you get too excited though, the sensor may be little, however the lab to house it isn’t. The team optically pumped rubidium with lasers. We’ve seen quantum radios that need more laboratory setup, however.