Which statement correctly describes the purpose of a transmission line from a transmitter to the antenna?

Which statement correctly describes the purpose of a transmission line from a transmitter to the antenna?

• A. It converts DC to AC
• B. It directs the amplified RF signal to the antenna
• C. It modulates the signal
• D. It stores RF energy for later use

Answer: (B)

The transmission line’s job is to carry the amplified RF energy from the transmitter to the antenna in a way that delivers maximum power. It does this by providing a low-loss path with proper impedance matching so the transmitter sees the antenna as its intended load; this prevents reflections and standing waves that waste power and can damage equipment. The line itself doesn’t create or modify the signal—modulation happens in the transmitter circuitry, and DC–AC conversion occurs in the RF power stage, not in the line. It also isn’t a storage device for RF energy. So the correct description is that the transmission line directs the amplified RF signal to the antenna.

The transmission line’s job is to carry the amplified RF energy from the transmitter to the antenna in a way that delivers maximum power. It does this by providing a low-loss path with proper impedance matching so the transmitter sees the antenna as its intended load; this prevents reflections and standing waves that waste power and can damage equipment. The line itself doesn’t create or modify the signal—modulation happens in the transmitter circuitry, and DC–AC conversion occurs in the RF power stage, not in the line. It also isn’t a storage device for RF energy. So the correct description is that the transmission line directs the amplified RF signal to the antenna.