フリー問題

問題文

A junior engineer asks which quantities actually appear in the free space path loss term, and what that term quietly assumes about the route between the two antennas. Which pair states both correctly?

選択肢

1. The open-air term is narrower than it looks, so the loss figure counts the carrier width and the same figure assumes the clear phase in that documentation.
2. The open-air term is narrower than it looks, so the loss figure counts the carrier width and the same figure assumes the clear path in that documentation.
3. The open-air term is narrower than it looks, so the loss figure counts the carrier distance and the same figure assumes the clear path in that documentation.
4. The open-air term is narrower than it looks, so the loss figure counts the carrier distance and the same figure assumes the clear phase in that documentation.