Benefits of microwave frequencies

Question

Question 1: What do you mean by transit time? Why it becomes a limiting factor at lug her frequencies?

Question 2: Describe different kinds of vacuum tubes in lieu of their weakness and strengths.

Question 3: What can be the probable solutions to the limitations of conventional tubes at high frequencies? Which one is the most excellent?

Question 4: Explain the principle of the working of Klystron.

Question 5: Why are multicavity klystron and reflex klystron mainly used for entirely different application?

Question 6: A two cavity klystron amplifier has the given parameters:

V₀ = 1000V, R₀ = 40Kohm, I₀ = 25mA, Freq = 3GHz,
Gap-spacing (d) =1mm,
Cavities-spacing = 4cm,
Effective shunt impedance, excluding beam loading = 30K ohm.

a) Determine the input gap voltage to give maximum voltage V₂.
b) Determine the voltage gain and efficiency of the amplifier neglecting the beam loading.

Question 7: Why a microwave is termed as Microwave?

Question 8: What do you mean by frequency range of microwave? What limits the frequency of microwaves?

Question 9: Write down the various bands in microwave range all along with the corresponding frequencies.

Question 10: Enlist the benefits of microwave frequencies over the lower frequency waves.