Topic: Microwave Engineering
In a Traveling-wave Tube, the velocity of electron beam with respect to the axial velocity of RF field is kept
- A. lower
- B. higher
- C. equal
- D. any of these
Answer: B. higher
Explanation: The velocity of the electron beam should ideally equal the axial velocity of the RF field for synchronization. However, to achieve net energy transfer from the electron beam to the RF field, the electron beam velocity is kept slightly higher.