The point at which electromagnetic energy is intentionally emitted into free space is the

The point at which electromagnetic energy is intentionally emitted into free space is the

• A. Ground
• B. Antenna
• C. Transmitter
• D. Transmission Line

Answer: (B)

Radiating into free space is accomplished by the antenna, which is designed to convert RF power into propagating electromagnetic waves. The energy is supplied by the transmitter and travels through the transmission line to the antenna, where currents on the conductors create time-varying electric and magnetic fields that radiate outward. The ground serves as a reference and return path, not the source of the radiation, and the transmitter is the energy source itself but the emission into space occurs at the antenna.

Radiating into free space is accomplished by the antenna, which is designed to convert RF power into propagating electromagnetic waves. The energy is supplied by the transmitter and travels through the transmission line to the antenna, where currents on the conductors create time-varying electric and magnetic fields that radiate outward. The ground serves as a reference and return path, not the source of the radiation, and the transmitter is the energy source itself but the emission into space occurs at the antenna.