Question 1: Compare the multi-cavity klystron, reflex klystron, magnetron and Traveling wave tube on the basis of their:
a) Basic construction
b) Operation
c) Applications
Question 2: Describe how the oscillations are sustained in the cavity magnetron with appropriate sketches supposing that the mode oscillations already exist.
Question 3: What are the different UHF limitations of vacuum tubes that limit their use at high frequencies? Explain each of these in detail and propose remedial measures.
Question 4: Differentiate between velocity modulation and current modulation.
Question 5: What do you mean by Hull cut off field?
Question 6: What is the phase focusing effect in the magnetron?
Question 7: What do you mean by slow wave structure and why is it required?
Question 8: What are reentrant cavities?
Question 9: What is the main purpose of strapping in the magnetron?
Question 10: What do you mean by electron bunching? How does it take place? Why it is also termed as intensity modulation?