MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 10 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. |
When a network is matched to its external circuitry, the gain of the two port network is given by: |
| A. | │S21│2 |
| B. | │S22│2 |
| C. | │S12│2 |
| D. | │S11│2 |
| Answer» B. │S22│2 | |
| 2. |
If the noise figures of the first stage of a two stage cascade network is 8 dB and the noise figure of the second stage is 7 dB and the gain of the first stage is 10, then the noise figure of the cascade is: |
| A. | 8. 6 dB |
| B. | 7.6 dB |
| C. | 5.6 dB |
| D. | 8.9 dB |
| Answer» B. 7.6 dB | |
| 3. |
__________ is defined as the ratio of input signal to noise ratio to the output signal to noise ratio. |
| A. | Noise figure |
| B. | Noise temperature |
| C. | SNRo |
| D. | None of the mentioned |
| Answer» B. Noise temperature | |
| 4. |
___________ is defined as the ratio of desired signal power to undesired noise power. |
| A. | Signal to noise ratio |
| B. | Noise to signal ratio |
| C. | Noise figure |
| D. | Noise temperature |
| Answer» B. Noise to signal ratio | |
| 5. |
WHEN_A_NETWORK_IS_MATCHED_TO_ITS_EXTERNAL_CIRCUITRY,_THE_GAIN_OF_THE_TWO_PORT_NETWORK_IS_GIVEN_BY:?$ |
| A. | │S<sub>21</sub>│<sup>2</sup> |
| B. | │S<sub>22</sub>│<sup>2</sup> |
| C. | │S<sub>12</sub>│<sup>2</sup> |
| D. | │S<sub>11</sub>│<sup>2</sup> |
| Answer» B. ‚Äö√Ñ√∂‚àö√Ü‚àö√°S<sub>22</sub>‚Äö√Ñ√∂‚àö√Ü‚àö√°<sup>2</sup> | |
| 6. |
Noise equivalent temperature of Wilkinson coupler having a gain of 1/2L is given as:$ |
| A. | T (2L-1) |
| B. | T (2L+1) |
| C. | T (2L*1) |
| D. | T / (2L-1) |
| Answer» B. T (2L+1) | |
| 7. |
For a Wilkinson power divider of insertion loss L and the coupler is matched to the external circuitry, and then the gain of the coupler in terms of insertion loss is:$ |
| A. | 2L |
| B. | 1/2L |
| C. | L |
| D. | 1/L |
| Answer» C. L | |
| 8. |
Noise equivalent temperature of a 2 stage cascade network is given by? |
| A. | Te<sub>1</sub> + Te<sub>2</sub>/ G<sub>1</sub> |
| B. | Te<sub>1</sub> + Te<sub>1</sub> |
| C. | Te<sub>1</sub> / Te<sub>1</sub> |
| D. | None of the mentioned |
| Answer» B. Te<sub>1</sub> + Te<sub>1</sub> | |
| 9. |
Noise equivalent temperature of a transmission line that adds noise to the noise of a device is: |
| A. | T (L-1) |
| B. | T (L+1) |
| C. | T (L) |
| D. | T/L |
| Answer» B. T (L+1) | |
| 10. |
Expression for noise of a two port network considering the noise due to transmission line and other lossy components is: |
| A. | GkTB + GN<sub>added</sub> |
| B. | GkTB |
| C. | GN<sub>added</sub> |
| D. | None of the mentioned |
| Answer» B. GkTB | |