Explore topic-wise MCQs in Antenna Array.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Antenna Array knowledge and support exam preparation. Choose a topic below to get started.

1.

For N- element linear uniform array, the normalized array factor is represented as ______________

A. ( frac{sin(N /2)}{N /2} )
B. ( frac{cos(N /2)}{N /2} )
C. (N frac{sin( /2)}{ /2} )
D. (N frac{cos(N /2)}{N /2} )
Answer» B. ( frac{cos(N /2)}{N /2} )
Discussion
2.

Find the angle at which nulls occur for the two element array antenna with separation /4 and phase difference is 0?

A. Doesn t exist
B. 0
C. /2
D. /4
Answer» B. 0
Discussion
3.

Find the angle at which nulls occur for the two element array antenna with separation /4 and phase difference is - /2?

A. 0
B. /2
C. /4
D.
Answer» E.
Discussion
4.

Find the angle at which nulls occur for the two element array antenna with separation /4 and phase difference is /2?

A. 0
B. /2
C. /4
D.
Answer» B. /2
Discussion
5.

Multiplying the normalized field with the normalized array factor gives ___________

A. pattern multiplication
B. array factor
C. beamwidth
D. null
Answer» B. array factor
Discussion
6.

Which of the following is true for uniform linear array elements, to obtain the total field?

A. The single element field is multiplied by the array factor
B. The single element field is multiplied by the normalized array factor
C. The single element field is multiplied by the beamwidth
D. The single element field is multiplied by the directivity
Answer» B. The single element field is multiplied by the normalized array factor
Discussion
7.

Which of the following pattern represents the array factor of a two element array separated by a distance of /4 and phase difference is 0?

A. <img alt="FThe array factor of two element array separated by distance of /4 - option a" class="alignnone size-full wp-image-275934" height="188" src="https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-factors-q4a.png" width="192"/>
B. <img alt="The array factor of two element array separated by distance of /4 - option b" class="alignnone size-full wp-image-275933" height="188" src="https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-factors-q4b.png" width="195"/>
C. <img alt="The array factor of two element array separated by distance of /4 - option c" class="alignnone size-full wp-image-275932" height="194" src="https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-factors-q4c.png" width="229"/>
D. <img alt="The array factor of two element array separated by distance of /4 - option d" class="alignnone size-full wp-image-275931" height="193" src="https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-factors-q4d.png" width="206"/>
Answer» B. <img alt="The array factor of two element array separated by distance of /4 - option b" class="alignnone size-full wp-image-275933" height="188" src="https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-factors-q4b.png" width="195"/>
Discussion
8.

Find the normalized Array factor when two antenna elements are separated by a distance of /4 and phase difference is 0 and =0?

A. (cos u2061( frac{ }{4}) )
B. (cos u2061( frac{ }{2}) )
C. (cos u2061( frac{3 }{4}) )
D. (cos u2061( frac{3 }{2}) )
Answer» B. (cos u2061( frac{ }{2}) )
Discussion
9.

Which of the following is a function of position of antennas in array and the weights?

A. Array Factor
B. Field pattern
C. Total array field
D. Beamwidth
Answer» B. Field pattern
Discussion
10.

The normalized array factor of a two element array antenna is given by ___________

A. (AF_n=cos u2061( frac{kdcos + }{2}) )
B. (AF_n=2cos( frac{kdcos + }{2}) )
C. (AF_n=cos u2061( frac{kdcos }{2}+ ) )
D. (AF_n=cos u2061( frac{kdsin + }{2}) )
Answer» B. (AF_n=2cos( frac{kdcos + }{2}) )
Discussion