In aperture coupling, a small aperture in the transverse wall of the waveguide acts as:

Electronics and Communication Engineering (ECE) : Microwave Communication - Quiz(MCQ)

series inductance

shunt inductance

shunt capacitance

series capacitance

Correct Answer : Option (B) : shunt inductance

Explanation : In aperture coupling, a small aperture is made in the transverse wall of the cavity which is to be coupled to an external microwave circuit. This aperture made in the transverse wall of the cavity acts as a shunt inductance.

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In a microwave resistor the wall thickness is made as small as possible to

minimize capacitive effect

reduce inductance

have low value of R

have high value of R

Correct Answer : minimize capacitive effect

In a klystron amplifier the transit time of electron passing the gap in the cavity should be

less than half cycle

less than one cycle

less than quarter cycle

more than quarter cycle

Correct Answer : less than quarter cycle

At a frequency equal to cutoff frequency in a rectangular wave guide

the flow of electromagnetic energy is zero

the flow of electromagnetic energy is infinite

the flow of electromagnetic energy is 10% of maximum

the flow of electromagnetic energy is 50% of maximum

Correct Answer : the flow of electromagnetic energy is infinite

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