Microwave Engineering MCQ Questions Answers – Electronics & Communication Engineering (ECE)
Microwave engineering is a crucial field within electronics and communication engineering (ECE) that deals with the study and utilization of electromagnetic waves with wavelengths ranging from one meter down to one millimeter. Microwaves have applications in various sectors, including telecommunications, radar systems, satellite communication, medical imaging, and more. Aspiring microwave engineers need a solid understanding of the concepts and principles underlying microwave technology. This article presents a comprehensive collection of multiple-choice questions (MCQs) and their answers to help ECE students enhance their knowledge and skills in microwave engineering.
1) HEMT used in the microwave circuit is a
a) source
b) high power amplifier
c) low noise amplifier
d) detector
2) Klystron operates on the principle of
a) Amplitude Modulation
b) Frequency Modulation
c) Pulse Modulation
d) Velocity Modulation
3) A cavity resonator can be represented by
a) an LC circuit
b) an LCR circuit
c) a lossy inductor
d) a lossy capacitor
4) Ionospheric preparation is not possible for microwaves because
a) Microwaves will be fully absorbed by the ionospheric layers
b) There will be an abrupt scattering in all directions
c) Microwave will penetrate through the ionospheric layers
d) There will be dispersion of microwave energy
5) If the peak power of pulsed microwave system is 104 W and the average power is 800 W, the the duty cycle will be
a) 80%
b) 8%
c) 0.8%
d) 0.08%
6) The noise produced in a microwave tube due to random nature of emission and electron flow is called
a) Partition noise
b) Shot noise
c) Johnson noise
d) Shannon noise
7) Which of the following is not possible in a circular wave guide ?
a) TE10
b) TE01
c) TE11
d) TE12
8) The pulse frequency is equal to
Duty cycle/pulse width
The reciprocal of the pulse repetition rate
Pulse width x peak power/average power
All of these
9) The maximum theoretical output circuit efficiency of a double resonator klystron amplifier is
a) 25%
b) 50%
c) 58%
d) 85%
10) Which of the following can be used for amplification of microwave energy?
a) Travelling wave tube
b) Magnetron
c) Reflex Klystron
d) Gunn diode