The antenna gain depends on its design. In transmitting antennas, the goal is high efficiency in radiating energy, while in receiving antennas it is high efficiency in what?

The antenna gain depends on its design. In transmitting antennas, the goal is high efficiency in radiating energy, while in receiving antennas it is high efficiency in what?

• A. Absorbing energy
• B. Gaining energy
• C. Reflecting energy
• D. Releasing energy

Answer: (B)

In reception, the key is how efficiently the antenna converts the incoming RF energy into electrical power for the receiver. A higher-gain antenna has a larger effective aperture, meaning it collects more of the incident signal and delivers more power to the load. So the aim is high efficiency in gaining energy from the incoming wave, which is why this option best describes the receiving case. The other ideas—absorbing energy as a loss, reflecting energy, or releasing energy—don’t capture the idea of efficiently converting and delivering the captured energy to the receiver.

In reception, the key is how efficiently the antenna converts the incoming RF energy into electrical power for the receiver. A higher-gain antenna has a larger effective aperture, meaning it collects more of the incident signal and delivers more power to the load. So the aim is high efficiency in gaining energy from the incoming wave, which is why this option best describes the receiving case. The other ideas—absorbing energy as a loss, reflecting energy, or releasing energy—don’t capture the idea of efficiently converting and delivering the captured energy to the receiver.