Radiometer Systems MCQ’s

This set of RF & Microwave Circuit Design Multiple Choice Questions & Answers (MCQs) focuses on “Radiometer Systems”.

1. Radiometry is a technique or the principle on which radar works.
a) True
b) False

2. According to Planck’s radiation law, a body can radiate energy to the medium surrounding it under all conditions invariably.
a) True
b) False

3. __________ system obtains information about a target by transmitting a signal and receiving the echo from the target.
a) Radar
b) Sonar
c) Radiometer
d) None of the mentioned

4. A major challenge in designing a radiometer is:
a) Design complexity
b) High cost
c) Requirement of highly sensitive receivers
d) None of the mentioned

5. The system bandwidth of a total power radiometer is determined by the:
a) RF amplifier
b) Local oscillator
c) IF filter
d) IF amplifier

6. The dominant factor affecting the accuracy of the total power radiometer is the variation of ___________
a) Gain in the overall system
b) The feedback circuit
c) Efficiency of the system
d) None of the mentioned

7. The receiver model of a total power radiometer is based on the:
a) AM receiver
b) FM receiver
c) Super heterodyne receiver
d) None of the mentioned

8. The integrator circuit after the detector in the receiver circuit is used to smooth out the short term variations in the signal power.
a) True
b) False

9. A Dicke radiometer is identical to the total power radiometer in all aspects except that they have different receiving antenna.
a) True
b) False

10. A typical radiometer would measure the brightness temperature over the range of about:
a) 50-300 K
b) 100-200 K
c) 400-500 K
d) None of the mentioned

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