qnli question: How much power will be delivered to the reciever if the antenna has an effective area of 12 m/2? sentence: For instance, if a radio wave passing a given location has a flux of 1 pW / m2 (10−12 watts per square meter) and an antenna has an effective area of 12 m2, then the antenna would deliver 12 pW of RF power to the receiver (30 microvolts rms at 75 ohms).