Yes, you are correct. A receiving antenna can also emit electromagnetic radiation, although at a lower level compared to a transmitting antenna. When an incoming electromagnetic wave interacts with the receiver antenna, it induces a voltage and causes the electrons in the antenna to oscillate. These oscillating electrons, in turn, produce an alternating current that can be used for further processing in the receiving system.
According to Maxwell's equations, any accelerated charge will emit electromagnetic radiation. Therefore, as the electrons in the receiving antenna oscillate back and forth, they emit electromagnetic waves. However, the power and intensity of the radiation emitted by a receiving antenna are typically much lower compared to a transmitting antenna.
In practical scenarios, the primary function of a receiving antenna is to capture and convert electromagnetic waves into electrical signals for processing, rather than to radiate significant amounts of energy. The focus is on maximizing the efficiency of receiving incoming signals, while minimizing any unintended radiation.
It's important to note that the emissions from a receiving antenna are typically considered as unintentional or incidental radiation, and they are subject to regulatory limits to ensure they do not cause interference or pose a risk to other devices or systems operating in the vicinity.