Microwave and Optical Communication System-MCQ

All signal frequencies are propagate in a transmission line at same speed than characteristic impedance of a transmission line is ______.

• Purely capacitive

• Purely resistive

• Purely inductive

• None of the above

The real part of propagation constant shows

• Attenuation constant

• Phase constant

• Reduction of only voltage amplitude

• Variation of voltage and current on basic unit

A device which converts electrical energy in the form of a current into optical energy is called as ___________

• Optical source

• Optical coupler

• Optical isolator

• Circulator

_______________ occurs as a result of the change in lasing frequency with gain.

• Frequency multiplication

• Dispersion

• Attenuation

• Line-width broadening

Which of the following is NOT an application of SWR?

• Microwave-based medical applications

• Measuring the efficiency of a communication line

• Step down transformer

• Installation and tuning of transmitting antennas

The Characteristic Impedance of a low pass filter in attenuation Band is _______ ?

• 0

• Real value

• Complex quantity

• Purely imaginary

____________ converts the received optical signal into an electrical signal..

• Detector

• Attenuator

• Laser

• LED

Dominant mode is defined as::

• Mode with the lowest cut off frequency

• Mode with the highest cut off frequency

• Any TEM mode is called a dominant mode

• None of the mentioned

The Waveguide only allows frequencies _______ the cutoff frequencies

• Below

• Above

• Equal to

• None of these

The waveguide can be considered as

• High pass filter

• Low pass filter

• Band pass filter

• None of these