Topic: Microwave Engineering
The cavity magnetron uses strapping to
- A. Prevent mode jumping
- B. Prevent cathode back-heating
- C. Ensure bunching
- D. Improve the phase focussing effect
Answer: A. Prevent mode jumping
Explanation: Strapping in a cavity magnetron involves connecting alternate anode poles with conductive rings. This helps to maintain the dominant $\pi$-mode of oscillation and suppresses adjacent, unwanted modes, thereby preventing mode jumping.