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Describe the physical explanation of read diode and the avalanche multiplication procedure.
What do you mean by Avalanche transit time Devices?
Describe some modes of operation of Gunn diode with the keep of sketches.
Compare the main characteristics of PIN diode and Tunnel diode.
What do you mean by velocity modulation? How is it distinct from normal modulation? Describe how velocity modulation is employed in klystron amplifier.
Ordinary low frequency circuit analysis is not sufficient to explain the electrical phenomenon-taking place at microwave frequencies, explain why?
What is the basic principle of operation of the BARITT diode?
Describe the use of PIN diode as a modulator.
Describe the fundamental needs of tunneling phenomenon in the Tunnel diode.
Derive an expression for the maximum possible theoretical effectiveness of a reflex Klystron.
Illustrate the expression for efficiency of two cavity Klystron amplifier.
Make a list of significant applications and the corresponding characteristics of the microwave.
Enlist the benefits of microwave frequencies over the lower frequency waves.
Describe the construction and working of a multicavity klystron.
What is the main purpose of strapping in the magnetron?
A given silicon Avalanche photodiode consists of a quantum efficiency of 65% at a wavelength of 900nm. Assume 0.5uW of optical power generates a multiplied photocurrent of 10uA. Determine multiplica
Compare the major characteristics of Pin photodiode and APD.
Outline the general LED structures for optical fiber communication describing their relative advantages and drawbacks.
What do you mean by the term internal quantum efficiency and external quantum efficiency of the optical source?
Find out attenuation due to fundamental Rayleigh scattering in decibels per kilometer at a wavelength of 0.63ms.
Explain the phenomenon of modal noise in optical fibers and propose how it might be avoided.
Describe absorption losses in optical fibers, comparing and contrasting the Intrinsic and extrinsic absorption methods.
What is the cause of material dispersion and waveguide dispersion? As well describe dispersion-shifted fibers.
Describe what is meant by graded index optical fiber giving an expression for the possible refractive index profile. Point out the main benefit of this kind of fiber with regard to the multimode pro