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 received power at the antenna terminals is Si=-80 dBm and the output noise power is -110 dBm then the output signal to noise ratio is given by: |
| A. | 30 dB |
| B. | -30 dB |
| C. | 35 dB |
| D. | -35 dB |
| Answer» B. -30 dB | |
| 2. |
A receiver system is operating at a bandwidth of 1 MHz and has a total system noise temperature of 762 K. then the output noise power is: |
| A. | -110 dBm |
| B. | -234 dBm |
| C. | -145 dBm |
| D. | -124 dBm |
| Answer» B. -234 dBm | |
| 3. |
If a transmission line connecting the antennas to the receiver has a loss of 1.5 dB, given the physical temperature is 270C, noise equivalent temperature is: |
| A. | 123 K |
| B. | 145 K |
| C. | 345 K |
| D. | 234 K |
| Answer» B. 145 K | |
| 4. |
In a receiver, if the noise figure of the mixer stage in the receiver is 7 dB, then the equivalent noise temperature is given that the receiver is operating at 290 K: |
| A. | 1163 K |
| B. | 1789 K |
| C. | 1000 K |
| D. | 1234 K |
| Answer» B. 1789 K | |
| 5. |
IF_THE_RECEIVED_POWER_AT_THE_ANTENNA_TERMINALS_IS_SI=-80_DBM_AND_THE_OUTPUT_NOISE_POWER_IS_-110_DBM_THEN_THE_OUTPUT_SIGNAL_TO_NOISE_RATIO_IS_GIVEN_BY:?$ |
| A. | 30 dB |
| B. | -30 dB |
| C. | 35 dB |
| D. | -35 dB |
| Answer» B. -30 dB | |
| 6. |
A receiver system is operating at a bandwidth of 1 MHz and has a total system noise temperature of 762 K. then the output noise power is? |
| A. | -110 dBm |
| B. | -234 dBm |
| C. | -145 dBm |
| D. | -124 dBm |
| Answer» B. -234 dBm | |
| 7. |
If the received power at antenna terminals is -80dBm, and if the input noise power is -115 dBm, then the input SNR is: |
| A. | 45 dB |
| B. | -195 dB |
| C. | -35 dB |
| D. | 35 dB |
| Answer» E. | |
| 8. |
Antenna noise temperature of a system is 210 K, noise temperature of transmission line is 123 K, loss of a transmission line connecting the antenna to receiver is 1.41 and noise temperature of the receiver cascade is 304 K. then the total system noise temperature is: |
| A. | 840 K |
| B. | 762 K |
| C. | 678 K |
| D. | 1236 K |
| Answer» C. 678 K | |
| 9. |
If a receiver is operating at a bandwidth of 1 MHz and has antenna noise temperature of 210 K, then the input noise power is: |
| A. | -90 dBm |
| B. | -115 dBm |
| C. | -56 dBm |
| D. | -120 dBm |
| Answer» C. -56 dBm | |
| 10. |
Given that the antenna efficiency is 0.9, equivalent brightness temperature is 200 K; physical temperature is 300 K, noise temperature of an antenna is: |
| A. | 220 K |
| B. | 210 K |
| C. | 240 K |
| D. | None of the mentioned |
| Answer» C. 240 K | |
| 11. |
If a transmission line connecting the antennas to the receiver has a loss of 1.5 dB, given the physical temperature is 270C, noise equivalent temperature is: |
| A. | 123 K |
| B. | 145 K |
| C. | 345 K |
| D. | 234 K |
| Answer» B. 145 K | |
| 12. |
Equivalent noise temperature of a transmission line connecting the antenna to the receiver is: |
| A. | T<sub>P</sub> (L<sub>P</sub>-1) |
| B. | T<sub>P</sub> (L<sub>P</sub> + 1) |
| C. | T<sub>P</sub>/ (L<sub>P</sub>-1) |
| D. | T<sub>P</sub> / (L<sub>P</sub> + 1) |
| Answer» B. T<sub>P</sub> (L<sub>P</sub> + 1) | |
| 13. |
The noise power will determine the maximum detectable signal level for a receiver. |
| A. | True |
| B. | False |
| Answer» C. | |