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ISRO EC 2019: Microwave Engineering Booster Quiz 4

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Question 1

In a pulsed radar, the peak radar transmitter power is increased by a factor of 81 keeping all other radar parameters unchanged. The maximum range capability of the radar increases by a factor of

Question 2

Which one of the following has the combined characteristics of dielectric, ohmic and radiation losses?

Question 3

A microwave antenna-characteristics are described as, low weight, low power- handing capacity and low bandwidth. What shall this be?

Question 4

Which of the following modes can exist in a rectangular wave guide?

Question 5

The waveguide (a = 1.5 cm, b = 1 cm) us loaded with dielectric (). Which one of the following is correct?
The 8 GHz signal will

Question 6

Match List-I (Modes) with List-II (Characteristic) and select the correct answer using the code given below the lists:
List-I
A). Evanescent mode
B). Dominant mode
C). TM10 and TM01
List-II
1). Rectangular waveguide does not support
2). No wave propagation
3). Lowest cut-off frequency

Question 7

A micro-strip line with alumina substrate εr = 9 has a trip width w = 3 mm. Substrate thickness h = 0.5mm. What is the pproximate characteristic impedance of the line, assuming TEM wave propagation and negligible fringing field?

Question 8

Maxwell’s equations are obeyed by the E.M. waves when these waves are travelling

Question 9

The main disadvantage of using coaxial cable for microwave signals is its.

Question 10

TEM wave cannot propagate in which one of the following?
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Jan 2ESE & GATE EC