MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Antenna Parameters knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The receiving antenna is designed to have ____ side-lobe-ratio and ____ SNR. |
| A. | Low, high |
| B. | High, high |
| C. | Low, low |
| D. | High, low |
| Answer» B. High, high | |
| 2. |
If beam width of the antenna increases, then directivity ________ |
| A. | Decreases |
| B. | Increases |
| C. | Remains unchanged |
| D. | Depends on type of antenna |
| Answer» B. Increases | |
| 3. |
The angular distance between two successive nulls of main lobe is called as ______ |
| A. | FNBW |
| B. | HPBW |
| C. | Beam width |
| D. | FBR |
| Answer» B. HPBW | |
| 4. |
Which of the following option is false? |
| A. | Omni-directional antenna is a special case of directional antenna |
| B. | Directional antenna radiates power effectively in particular directions compared to other directions |
| C. | Isotropic antenna radiates power in all directions |
| D. | End-fire array antenna has its main beam normal to the axis containing antenna |
| Answer» E. | |
| 5. |
Find the effective area of a half-wave dipole operating at frequency 100MHz and directive gain 1.8? |
| A. | 1.28m2 |
| B. | 2.18m2 |
| C. | 0.128m2 |
| D. | 12.8m2 |
| Answer» B. 2.18m2 | |
| 6. |
Which of the following field varies inversely with r2? |
| A. | Far field |
| B. | Near field |
| C. | Radiation field |
| D. | Electrostatic field |
| Answer» C. Radiation field | |
| 7. |
Relation between beam solid angle Ω, horizontal half-power beam width ∅A, vertical half-power beam width ∅E is __________ |
| A. | Ω≈∅A.∅E |
| B. | Ω≈∅A+∅E |
| C. | Ω≈∅A/∅E |
| D. | Ω≈∅A-∅E |
| Answer» B. Ω≈∅A+∅E | |
| 8. |
Front-to-Back ratio is defined as ratio of power radiated in desired direction to the power radiated in back lobe. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Find the power radiated by an antenna whose radiation resistance is 100Ω and operating with 3A of current at 2GHz frequency? |
| A. | 900W |
| B. | 1800W |
| C. | 450W |
| D. | 700W |
| Answer» B. 1800W | |
| 10. |
A linear antenna having length less than λ/8 is called as _______ |
| A. | Short monopole |
| B. | Short dipole |
| C. | Half-wave dipole |
| D. | Quarter-wave monopole |
| Answer» B. Short dipole | |