# Electronics and Communication Engineering - Microwave Communication

### Exercise :: Microwave Communication - Section 8

6.

In rectangular waveguides the ratio of width to height is about

 A. 0.5 B. 1 C. 2 D. 4

Explanation:

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7.

If wavelength in free space is λ0 wavelength in insulator λ, μr is relative permittivity or insulator and ∈r is relative permittivity or insulator, then

 A. B. C. D. Explanation:

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8.

In the given figure the circuits for input impedance of a microwave device with output ports match terminated. The device is A. E plane tee B. H plane tee C. magic tee D. hybrid ring

Explanation:

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9.

Which of these statements is correct?

 A. Ridge guide is essentially a form of capacitively loaded guide. B. Ridge guide is essentially a form of inductively loaded guide. C. Ridge guide is essentially a form of resistively loaded guide. D. Ridge guide has higher power handling capacity than rectangular waveguide.

Explanation:

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10.

A rectangular waveguide has width a. Then at the cutoff frequency (with corresponding wave length λc)

 A. B. a = λc C. D. a = 2λc