Microwave Devices and Circuits MCQs

Question 1

Free space loss suffered by a icrowave signal for a hop length d is a function of

Accepted Answer

d2

Answer

d112

Answer

d

Answer

d3

Question 2

Diffraction of electromagnetic waves

Accepted Answer

may occur around the edge of a sharp obstacle

Answer

is caused by reflection from the ground

Answer

arises only with spherical wavefronts

Answer

will occur when the wave pass through a large slot

Question 3

The absorption of radiowaves by atmosphere depends on

Accepted Answer

their frequency

Answer

their distance from the transmitter

Answer

the polarization of the waves

Answer

the polarization of the atmosphere

Question 4

Frequenices in UHF range propagate by means of?waves.

Accepted Answer

space

Answer

ground

Answer

sky

Answer

surface

Question 5

Trposcatter system capacity than line-of-sight microwave system.

Accepted Answer

more

Answer

less

Answer

same

Answer

none of the above

Question 6

A non-degenarate parametric amplifier has an input frequency fi and pump frequency fp. The idler frequency is

Accepted Answer

fp fi

Answer

fi

Answer

2 fi

Answer

f ? fp

Question 7

Indicate which of the following system is digital pulse? modulation.

Accepted Answer

code

Answer

position

Answer

width

Answer

frequency

Question 8

The main disadvantage of the two-hole directional coupler is

Accepted Answer

narrow bandwidth

Answer

low directional coupling

Answer

poor directivity

Answer

high SWR

Question 9

Indicate the false statement. SWR on a transmission line is infinity; the line is terminated in a/an

Accepted Answer

complex impedance

Answer

short circuit

Answer

open circuit

Answer

pure reactance