Microwave Communication Multiple Choice Questions

Microwave Communication

Question 1.

Coupling into and out of a traveling-wave tube can be accompanied by a

A.

 Waveguide match

B.

 Cavity match

C.

 Direct coax-helix match

D.

 All of the above

Explanation :

Explanation Not Provided

Question 2.

When it is desired that short-range targets be clearly seen on a pulsed-radar set, it is important that the receiver and display system have

A.

 A long time constant

B.

 Low-pass filters

C.

 The shortest possible time

D.

 The restricted high-frequency response

Explanation :

Explanation Not Provided

Question 3.

The antenna separations (in meters) required for optimum operation of a space diversity system can be calculated from:
where R = effective earth radius (m) and L = path length (m)

A.

 S = 2λR/L

B.

 S = 3λR/L

C.

 S = λR/RL

D.

 S = λR/L

Explanation :

Explanation Not Provided

Question 4.

The aquadag coating on the inside of PPI tube is used

A.

 To focus the beam of primary electrons

B.

 To shield the electron beam from unidirectional magnetic

C.

 As a second anode and to prevent the build-up of secondary field

D.

 All of these

Explanation :

Explanation Not Provided

Question 5.

What allow microwave to pass in only one direction?

A.

 RF emitter

B.

 Capacitor

C.

 Varactor-triac

D.

 Ferrite emitter

Explanation :

Explanation Not Provided

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