RET (Radiation Efficiency Theory)

Radiation Efficiency Theory (RET) explains how effectively a source, such as an antenna or another device, converts electrical energy into electromagnetic radiation, which can include radio waves or light. In practical terms, RET assesses how much of the input power is actually emitted as useful radiation versus how much is lost as heat or absorbed by materials. Understanding RET helps engineers design better communication systems by maximizing the efficiency of devices that need to transmit signals, which is crucial for technologies like cell phones, radios, and other wireless communications.