What are the parts of an EMF emitter?

• A. Transmitter
• B. Transmission Line
• C. Antenna
• D. Transmitter, Transmission Line, and Antenna

Answer: (D)

An EMF emitter is made up of three essential parts: the source of RF energy (the transmitter), the path that guides that energy to the radiator (the transmission line), and the element that actually radiates the energy into space (the antenna). The transmitter creates the RF signal, the transmission line carries that energy from the transmitter to the antenna while maintaining proper impedance, and the antenna converts the guided energy into free-space electromagnetic waves with a specific radiation pattern. All three are needed for emission: without a transmitter there’s no energy to emit; without a transmission line there’s nothing to deliver energy to the antenna; without an antenna there’s nothing to radiate the energy. That’s why the full set—transmitter, transmission line, and antenna—constitutes an EMF emitter.