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ISRO EC 2019: Microwave Engineering Booster Quiz 5

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Question 1

Consider the following statements:
In the case of space wave propagation, the signal strength at the receiver is
1). Directly proportional to transmitter and receiver heights.
2). Inversely proportional to distance between
3). Directly proportional to frequency.
Which of the above statements is/are correct?

Question 2

In an air-filled waveguide of dimensions a cm × b cm, at a given frequency, the longitudinal component of electric field of TM32 mode is of the form.

Which form would EZ have for the lowest order TM mode?

Question 3

Which one the following express the phase velocity in microstrip lines?

Question 4

One of the reasons why vacuum tubes eventually fail at microwave frequencies is that their

Question 5

In terrestrial microwave links, the number of ‘fades’ per unit time increases as

Question 6

Microwave link repeaters are typically 50 km apart in TV transmission, because

Question 7

It the receiving antenna is polarized at 900 with respect to transmitting antenna, it will receive.

Question 8

A ship to ship communication system is affected by fading. A useful solution which can be used is

Question 9

The phase difference between adjacent anode poles of Magnetron is generally:

Question 10

The efficiency of an antenna having a resistance of 30Ω and radiation resistance of 60Ω is.
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Jan 3ESE & GATE EC