Electronics and Communication Engineering - Microwave Communication

Exercise : Microwave Communication - Section 8
31.
A directional coupler is used
to transmit microwave signals
to generate microwave signals
to measure amplitude and phase of a travelling wave
both (a) and (b)
Explanation:
No answer description is available. Let's discuss.

32.

Assertion (A): In rectangular waveguide TE01 mode is just TE10 mode rotated by 90°.

Reason (R): When a rectangular waveguide is rotated by 90°, the broad and narrow dimensions get interchanged.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
Explanation:
No answer description is available. Let's discuss.

33.
Consider the following statements about a magic tee
1. The collinear arms are isolated from each other.
2. On of the collinear arms is isolated from E arm.
3. On of the collinear arms is isolated from H arm.
4. E and H arms are isolated from each other.
Of the above statements
1 and 2 are correct
1 and 3 are correct
1 and 4 are correct
2 and 3 are correct
Explanation:
No answer description is available. Let's discuss.

34.

Assertion (A): Hollow waveguides are frequently used as transmission lines at microwave frequencies.

Reason (R): Waveguide has high power handling capacity, low loss and simple structure.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
Explanation:
No answer description is available. Let's discuss.

35.
In p mode of operation of magnetron the spikes due to phase focussing effect rotate at an angular velocity corresponding to
one pole/cycle
two pole/cycle
four pole/cycle
six pole/cycle