MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the equivalent impedance of the resonator at resonance is 12.5 Ω and the characteristic impedance of the feed line is 50 Ω, then the coupling coefficient is: |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 1 |
| Answer» B. 0.5 | |
| 2. |
If the reflection coefficient between the feed line and the resonator is -0.6, then the equivalent impedance of the resonator at resonance given that the characteristic impedance of the microstrip line is: |
| A. | 50 Ω |
| B. | 12.5 Ω |
| C. | 25 Ω |
| D. | none of the mentioned |
| Answer» C. 25 Ω | |
| 3. |
It is desired to design a frequency oscillator at 2.4 GHz and the reflection coefficient desired is 0.6, then the coupling coefficient between the feed line and the dielectric resonator is: |
| A. | 1.5 |
| B. | 1 |
| C. | 0.5 |
| D. | none of the mentioned |
| Answer» B. 1 | |
| 4. |
IF_THE_REFLECTION_COEFFICIENT_BETWEEN_THE_FEED_LINE_AND_THE_RESONATOR_IS_-0.6,_THEN_THE_EQUIVALENT_IMPEDANCE_OF_THE_RESONATOR_AT_RESONANCE_GIVEN_THAT_THE_CHARACTERISTIC_IMPEDANCE_OF_THE_MICROSTRIP_LINE_IS:?$ |
| A. | 50 Ω |
| B. | 12.5 Ω |
| C. | 25 Ω |
| D. | none of the mentioned |
| Answer» C. 25 ‚âà√≠¬¨¬© | |
| 5. |
If_the_equivalent_impedance_of_the_resonator_at_resonance_is_12.5_Ω_and_the_characteristic_impedance_of_the_feed_line_is_50_Ω,_then_the_coupling_coefficient_is:$# |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 1 |
| Answer» B. 0.5 | |
| 6. |
It is desired to design a frequency oscillator at 2.4 GHz and the reflection coefficient desired is 0.6, then the coupling coefficient between the feed line and the dielectric resonator is? |
| A. | 1.5 |
| B. | 1 |
| C. | 0.5 |
| D. | none of the mentioned |
| Answer» B. 1 | |
| 7. |
A dielectric resonator can be incorporated into a circuit to provide _________ using either parallel or series arrangement. |
| A. | frequency stability |
| B. | oscillations |
| C. | high gain |
| D. | optimized reflection coefficient |
| Answer» B. oscillations | |
| 8. |
If the reflection coefficient seen on the terminated microstrip line looking towards the resonator is 0.5, then the coupling coefficient is: |
| A. | 0.5 |
| B. | 0.25 |
| C. | 0.234 |
| D. | 1 |
| Answer» E. | |
| 9. |
The coupling factor between the resonator and the microstrip line is the ratio of external Q to the unloaded Q. |
| A. | true |
| B. | false |
| Answer» C. | |
| 10. |
A dielectric resonator is modeled as __________ when it is used as a tuning circuit with a oscillator. |
| A. | series RLC circuit |
| B. | parallel RLC circuit |
| C. | LC circuit |
| D. | tank circuit |
| Answer» C. LC circuit | |
| 11. |
A dielectric resonator coupled with an oscillator operates in: |
| A. | TE<sub>10δ</sub> |
| B. | TE<sub>01δ</sub> |
| C. | TM<sub>10δ</sub> |
| D. | TM<sub>01δ</sub> |
| Answer» B. TE<sub>01‚âà√≠¬¨‚Ä¢</sub> | |
| 12. |
In oscillator tuning circuits, dielectric resonators are preferred over waveguide resonators because: |
| A. | they have high Q factor |
| B. | compact size |
| C. | they are easily integrated with microwave integrated circuits |
| D. | all of the mentioned |
| Answer» E. | |
| 13. |
The stability of an oscillator is enhanced with the use of: |
| A. | high Q tuning network |
| B. | passive elements |
| C. | appropriate feedback methods |
| D. | none of the mentioned |
| Answer» B. passive elements | |