| 1. | If the height of the waveguide is halved, its cut-off wavelength will ? | |
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be doubled
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be one-fourth of the previous value
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be halved
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remain unchanged
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Report Question| 2. | Which mode has the lowest attenuation in a circular waveguide ? | |
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TE01
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TE 10
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TE11
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TM11
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| 3. | The following quantity is not required in cavity resonator ? | |
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Dimensions of the cavity
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Loss in radiation
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Energy stored
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Power dissipated
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| 4. | Which of the following microwave components has got the combined characteristic of dielectric, ohmic and radiation losses ? | |
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Co-axial line
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Waveguide
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Microstrip line
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Parallel twin line
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| 5. | Tees and junctions constitute ? | |
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three or more port network
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three port network
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single port network
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two port network
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| 6. | In a microwave magic T, E plane and H plane are ? | |
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isolated
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in phase
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90° out of phase
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out of phase
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| 7. | Which device can detect the presence of both forward and backward waves in a waveguide ? | |
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Magic T
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Filter
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Detector
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Directional coupler
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| 8. | The directivity of an ideal directional coupler is ? | |
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40 dB
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unity
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zero
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infinity
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| 9. | Klystron operation is based on the principle of ? | |
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phase modulation
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frequency modulation
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velocity modulation
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amplitude modulation
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| 10. | Which of the following are microwave sources ? | |
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Magnetron
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TWTA
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Klystron
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IMPATT
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