On Kickstarter, there is a campaign for a RFID tag of sorts. It works with Bluetooth LE and is powered by energy harvesting the 2.4 gigahertz band. With clear line of site, they claim a range of 200 feet.
The product is called iFind and the company is WeTag.
Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.