| 1. | Microwave links are preferred for TV transmission because ? | |
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they produce less phase distortion
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easy to transmit
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there is small S/N ratio
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there is no impulse noise
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Report Question| 2. | Microwave frequencies are used for communication with deep space probes primarily because they do not suffer ? | |
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attenuation in space
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fading
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velocity distortion and phase distortion
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refraction by ionosphere
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| 3. | Microwave links are generally transmission because preferred to coaxial cable for TV ? | |
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they are cheaper
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of their greater bandwidth
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of their relative immunity to impulse noise
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they have less overall phase distortion
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| 4. | The main difference between the operation of transmission lines and waveguides is that ? | |
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terms such as impedance notching and standing wave ratio cannot be applied to waveguides
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transmission lines use the principal mode of propagation and therefore, do not suffer from low frequency cut-off
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the former can use stubs and quarter wave transformers unlike the latter
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the latter are not distributed like transmission lines
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| 5. | A rectangular waveguide supports ? | |
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TEM
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only TM
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TE and TM
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only TE
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| 6. | The ratio of the transverse electric field to the transverse magnetic field is called as ? | |
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Poynting vector
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phase velocity
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waveguide impedance
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waveguide wavelength
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| 7. | A waveguide section in a microwave circuit will act as a ? | |
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high-pass filter
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band-stop filter
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band-pass filter
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low-pass filter
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| 8. | In a rectangular wave guide, the phase velocity ? | |
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is constant
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decreases with increasing frequency
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is independent of frequency
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increases with increasing frequency
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| 9. | A waveguide operated below cut-off frequency can be used ? | |
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an attenuator
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an isolator
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a phase shifter
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None of the above
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| 10. | The dominant mode in a waveguide is characterized by ? | |
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infinite attenuation
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zero attenuation
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short cut-off wavelength
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longest cut-off wavelength
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