A television antenna is a device that captures broadcast signals from television stations. It converts these signals into electrical currents, allowing viewers to watch free over-the-air channels. Antennas can be indoor or outdoor, and their effectiveness often depends on their location and the distance from the broadcast towers. There are different types of antennas, including dipole antennas, Yagi-Uda antennas, and loop antennas. Each type has its own design and purpose, catering to various reception needs. Using a television antenna can provide access to local channels without the need for a cable subscription.