What does Gain/Directivity focus?

What does Gain/Directivity focus?

• A. Focuses energy
• B. Stores energy
• C. Absorbs energy
• D. Dissipates energy

Answer: (A)

Gain and directivity describe how an antenna concentrates its radiated energy in space. They quantify how much power the antenna radiates in a specified direction compared with an ideal isotropic radiator. Because they measure the directional concentration of energy, higher gain or higher directivity means the energy is focused into a beam rather than spread evenly in all directions. The idea is about directing energy, not about storing energy in the near field, absorbing energy, or dissipating energy as heat or losses. Efficiency can affect the actual gain, but the core point remains: focusing energy into a chosen direction.

Gain and directivity describe how an antenna concentrates its radiated energy in space. They quantify how much power the antenna radiates in a specified direction compared with an ideal isotropic radiator. Because they measure the directional concentration of energy, higher gain or higher directivity means the energy is focused into a beam rather than spread evenly in all directions. The idea is about directing energy, not about storing energy in the near field, absorbing energy, or dissipating energy as heat or losses. Efficiency can affect the actual gain, but the core point remains: focusing energy into a chosen direction.