Which part of radio spectrum is more crowded? Lower frequency part Higher freque

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Question
Which part of radio spectrum is more crowded?
Options
A. Lower frequency part
B. Higher frequency part
C. Both (a) and (b)
D. None of these

Correct Answer

None of these

Microwave Communication problems

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2. Assertion (A): For a reciprocal microwave junction the S matrix is symmetrical.
Reason (R): In a symmetrical matrix S_ij = S_ji.
Options
A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is correct but R is wrong
D. A is wrong but R is correct

4. Fibers have numerical aperture (NA) in the range of 0.15 to 0.4 Fibers with higher NA value would have
Options
A. reduced losses
B. high bandwidth
C. reduced losses and low bandwidth
D. more losses and low bandwidth

7. In microwave circuits, a mode transducer is used to
Options
A. change mode of wave transmission
B. change direction of wave transmission
C. change polarization of wave transmission
D. change mode, direction or polarization wave transmission

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