What is the primary function of antennas in TBS communications?

The primary function of antennas in TBS communications is to transmit and receive radio frequency signals, effectively converting electrical energy into electromagnetic waves. This process is essential for enabling wireless communication, as antennas serve as the interface that allows the transmission of information over distances without the need for physical connections.

When an antenna transmits, it takes the electrical signals generated by a transmitter and transforms them into electromagnetic waves that propagate through the air. Conversely, when receiving signals, antennas capture these electromagnetic waves and convert them back into electrical signals that can be processed by receiving equipment. This dual capability of transmitting and receiving is crucial for maintaining effective communication links in various TBS applications.

In this context, other functions associated with communication are not the primary role of antennas. For example, encoding information onto a carrier wave is typically the responsibility of modulating devices rather than antennas themselves. Amplifying signals and filtering noise involve additional components in the communication system, such as amplifiers and filters, but these activities are not direct functions of antennas. Thus, the correct option accurately encapsulates the core responsibility of antennas in TBS communications.