Microwave Devices and Circuits MCQs

Question 1

A directional coupler that has more than two holes is sometimes preferred overa two hole coupler because

Accepted Answer

it increases the system bandwith

Answer

it eliminates the spurious mode generation

Answer

it increases signal coupling

Answer

none of these

Question 2

In an H-plane tee,

Accepted Answer

all the three arms lie in the plane of magnetic field

Answer

all the three arms lie in the plane of electric field

Answer

all the three arms lie in a plane perpendicular to magnetic field

Answer

none of these

Question 3

The chief advantage of a TRAPATT diode over an IMPATT diode is its

Accepted Answer

higher efficiency

Answer

lower noise ability to operate at higher frequencies

Answer

both A and B

Answer

none of these

Question 4

In a microwave test bench, why is the microwave signal amplitude modulated at 1 kHz?

Accepted Answer

Because crystal detector fails at microwave frequencies

Answer

To increase the sensitivity of measurement

Answer

To transmit the signal to a far-off place

Answer

To study amplitude modulation