MCQOPTIONS
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MCQOPTIONS
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. |
A 4-isotropic element end-fire array separated by a /4 distance has first null occurring at ____________ |
| A. | 60 |
| B. | 30 |
| C. | 90 |
| D. | 150 |
| Answer» D. 150 | |
| 2. |
The direction of the first minor lobe of 4 element isotropic broadside array separated by /2 is ___________ |
| A. | 41.4 |
| B. | 30 |
| C. | 60 |
| D. | 90 |
| Answer» B. 30 | |
| 3. |
The necessary condition for maximum of the second side lobe of n element array is __________ |
| A. | ( frac{N }{2}= frac{5 }{2} ) |
| B. | ( frac{N }{2}= frac{3 }{2} ) |
| C. | ( frac{N }{2}= frac{ }{2} ) |
| D. | ( frac{N }{2}= frac{4 }{2} ) |
| Answer» B. ( frac{N }{2}= frac{3 }{2} ) | |
| 4. |
What is the direction of first null of broadside 4-element isotropic antenna having a separation of /4? |
| A. | 0 |
| B. | 60 |
| C. | 30 |
| D. | 120 |
| Answer» B. 60 | |
| 5. |
What is the direction of first null of broadside 4-element isotropic antenna having a separation of /2? |
| A. | 60 |
| B. | 30 |
| C. | 180 |
| D. | 0 |
| Answer» B. 30 | |
| 6. |
The array factor of 4- isotropic elements of broadside array separated by a /2 is given by ____________ |
| A. | sinc(2cos ) |
| B. | sin(2 cos ) |
| C. | sinc(2 sin ) |
| D. | sin(2sin ) |
| Answer» B. sin(2 cos ) | |
| 7. |
The array factor of 4- isotropic elements of broadside array separated by a /4 is given by ____________ |
| A. | sinc(cos ) |
| B. | cos(sin ) |
| C. | sin(sin ) |
| D. | sin(cos ) |
| Answer» B. cos(sin ) | |
| 8. |
A 4-isotropic element broadside array separated by a /4 distance has nulls occurring at ____________ |
| A. | cos<sup>-1</sup> ( n) |
| B. | (cos^{-1} ( frac{n}{2}) ) |
| C. | (sin^{-1} ( frac{n}{2}) ) |
| D. | sin<sup>-1</sup> ( n) |
| Answer» B. (cos^{-1} ( frac{n}{2}) ) | |
| 9. |
A 4-isotropic element broadside array separated by a /2 distance has nulls occurring at ____________ |
| A. | (cos^{-1} ( frac{n}{2}) ) |
| B. | (cos^{-1} ( frac{4n}{2}) ) |
| C. | (sin^{-1} ( frac{n}{2}) ) |
| D. | (sin^{-1} ( frac{n}{4}) ) |
| Answer» B. (cos^{-1} ( frac{4n}{2}) ) | |
| 10. |
The array factor of 4- isotropic elements of broadside array is given by ____________ |
| A. | ( frac{sin(2kdcos )}{2kdcos } ) |
| B. | ( frac{sin(kdcos )}{2kdcos } ) |
| C. | ( frac{sin(2kdcos )}{kdcos } ) |
| D. | ( frac{cos(2kdcos )}{2kdcos } ) |
| Answer» B. ( frac{sin(kdcos )}{2kdcos } ) | |