Broadcast antennas are devices used to transmit radio and television signals over long distances. They convert electrical signals into electromagnetic waves, which travel through the air to reach receivers, such as radios and TVs. These antennas can be found in various shapes and sizes, depending on their purpose and the frequency of the signals they transmit. There are different types of broadcast antennas, including dipole antennas, monopole antennas, and parabolic antennas. Each type has its own advantages and is suited for specific applications. For example, parabolic antennas are often used for satellite communications due to their ability to focus signals effectively.