MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
Which of the following is the correct condition of an ordinary end-fire array? |
| A. | = kd |
| B. | =kd |
| C. | > kd |
| D. | < kd |
| Answer» B. =kd | |
| 2. |
Find the overall length of an end-fire array with 10 elements and spacing /4. |
| A. | ( frac{9 }{4} ) |
| B. | ( frac{5 }{4} ) |
| C. | ( frac{5 }{2} ) |
| D. | ( frac{9 }{2} ) |
| Answer» B. ( frac{5 }{4} ) | |
| 3. |
What is the progressive phase excitation of an end-fire array with element spacing /4 at =180 ? |
| A. | ( frac{ }{2} ) |
| B. | (- frac{ }{2} ) |
| C. | |
| D. | ( frac{ }{4} ) |
| Answer» B. (- frac{ }{2} ) | |
| 4. |
Which of the following statements is true regarding end-fire array? |
| A. | The necessary condition of an ordinary end-fire array is = kd+n |
| B. | The phase excitation difference is zero |
| C. | Same input current is fed through the array, but the phase excitation is varies progressively |
| D. | Maximum radiation occurs at normal to the axis of array |
| Answer» D. Maximum radiation occurs at normal to the axis of array | |
| 5. |
What is the phase excitation difference in end-fire array with array spacing d at =0 ? |
| A. | (- frac{2 }{ } d ) |
| B. | ( frac{2 }{ } d ) |
| C. | (- frac{ }{ } d ) |
| D. | ( frac{ }{ } d ) |
| Answer» B. ( frac{2 }{ } d ) | |
| 6. |
The phase excitation difference is zero in end-fire array. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
What is the phase excitation difference for an end-fire array? |
| A. | 0 |
| B. | kd /2 |
| C. | |
| D. | kd |
| Answer» E. | |
| 8. |
The direction of maximum radiation in end-fire array is ______ with respect to the array axis. |
| A. | 0 or 180 |
| B. | 90 |
| C. | 45 |
| D. | 270 |
| Answer» B. 90 | |