Microwave LASER (Light Amplification by Stimulated Emission of Radiation), known as a MASER—same acronym, but Microwave instead of Light. In practice, a MASER is a type of LASER. We can use them to transmit energy (in the form of photons), which may then be absorbed by some kind of receiving transducer. In the case of beam-transmission of power, the receiving transducer is an antenna—most likely a very large array of ‘em.