Radio towers are designed to emit radio wave, not receive. You need some kind of device which can pick up super weak radio wave from human body, that’s more like a pinpoint directional radar. Such devices simply can't work on multiple people at once.
Radio towers are designed to emit radio wave, not receive. You need some kind of device which can pick up super weak radio wave from human body, that’s more like a pinpoint directional radar. Such devices simply can't work on multiple people at once.