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. |
What is the radiation pattern of a broadside array when array element axis coincides with the 0 line? |
| A. | <img alt="Radiation pattern of broadside array when element axis coincides with 0 line - option a" class="alignnone size-full wp-image-276008" height="318" sizes="(max-width: 222px) 100vw, 222px" src="https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-broadside-array-q10a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-broadside-array-q10a.png 222w, https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-broadside-array-q10a-209x300.png 209w" width="222"/> |
| B. | <img alt="Radiation pattern of broadside array when element axis coincides with 0 line - option b" class="alignnone size-full wp-image-276007" height="242" sizes="(max-width: 367px) 100vw, 367px" src="https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-broadside-array-q10b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-broadside-array-q10b.png 367w, https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-broadside-array-q10b-300x198.png 300w" width="367"/> |
| C. | <img alt="Radiation pattern of broadside array when element axis coincides with 0 line - option c" class="alignnone size-full wp-image-276006" height="252" src="https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-broadside-array-q10c.png" width="263"/> |
| D. | <img alt="Radiation pattern of broadside array when element axis coincides with 0 line - option d" class="alignnone size-full wp-image-276005" height="216" src="https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-broadside-array-q10d.png" width="213"/> |
| Answer» B. <img alt="Radiation pattern of broadside array when element axis coincides with 0 line - option b" class="alignnone size-full wp-image-276007" height="242" sizes="(max-width: 367px) 100vw, 367px" src="https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-broadside-array-q10b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-broadside-array-q10b.png 367w, https://www.sanfoundry.com/wp-content/uploads/2020/05/antenna-array-questions-answers-broadside-array-q10b-300x198.png 300w" width="367"/> | |
| 2. |
Which of the following is false regarding a linear broadside array with 2 elements and spacing ? |
| A. | Directivity = 6.02 dB |
| B. | No grating lobes are present |
| C. | Nulls occur at (cos^{-1} u2061 frac{1}{2} ) |
| D. | The maxima occurs normal to the axis of array and also at other angles |
| Answer» C. Nulls occur at (cos^{-1} u2061 frac{1}{2} ) | |
| 3. |
The directivity of a linear broadside array with half wave length spacing is equal to _____ |
| A. | Unity |
| B. | Zero |
| C. | Half of the number of elements present in array |
| D. | Number of elements present in array |
| Answer» E. | |
| 4. |
In a broadside array all the elements must have equal ______ excitation with similar amplitude excitations to get maximum radiation. |
| A. | Phase |
| B. | Frequency |
| C. | Voltage |
| D. | Current |
| Answer» B. Frequency | |
| 5. |
What would be the directivity of a linear broadside array in dB consisting 5 isotropic elements with element spacing /4? |
| A. | 9.37 |
| B. | 3.97 |
| C. | 6.53 |
| D. | 3.79 |
| Answer» C. 6.53 | |
| 6. |
Find the value n at which null occurs for an 8-element broadside array with spacing d. |
| A. | (cos^{-1} u2061 frac{ n}{Nd} ) |
| B. | (sin^{-1} u2061 frac{ n}{Nd} ) |
| C. | (cos^{-1} u2061 frac{2 n}{Nd} ) |
| D. | (sin^{-1} u2061 frac{2 n}{Nd} ) |
| Answer» B. (sin^{-1} u2061 frac{ n}{Nd} ) | |
| 7. |
Which of the following cannot be the separation between elements in a broadside array to avoid grating lobes? |
| A. | 4 /2 |
| B. | /2 |
| C. | 3 /2 |
| D. | 5 /2 |
| Answer» B. /2 | |
| 8. |
Which of the following statements is false regarding a broadside array? |
| A. | The maximum radiation is normal to the axis of the array |
| B. | Must have same amplitude excitation but different phase excitation among different elements |
| C. | The spacing between elements must not equal to the integral multiples of |
| D. | The phase excitation difference must be equal to zero |
| Answer» C. The spacing between elements must not equal to the integral multiples of | |
| 9. |
What is the phase excitation difference for a broadside array? |
| A. | 0 |
| B. | /2 |
| C. | |
| D. | 3 /2 |
| Answer» B. /2 | |
| 10. |
In Broadside array the maximum radiation is directed with respected to the array axis at an angle____ |
| A. | 90 |
| B. | 45 |
| C. | 0 |
| D. | 180 |
| Answer» B. 45 | |