ECE :: Microwave Communication
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Assertion (A): A small section of high impedance line is equivalent to a series inductance.
Reason (R): A small section of a low impedance line is equivalent to a series resistance.
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Assertion (A): Bolometer is frequently used in microwave power measurement.
Reason (R): In a bolometer the input microwave power causes a change in resistance.
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The radiation resistance of a doublet antenna of length dl is proportional to
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Which of the following statements is not correct regarding modes of electromagnetic energy transmission?
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Oscillations are obtained from a reflex klystron only for combinations of anode voltage and repeller voltage that give a favourable transit time.
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In the given figure shows a 10dB directional coupler. If power input at port 1 is 100 mW, power output at port 3 is
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Which one of the following is true for EM wave propagation through rectangular waveguide of cross-section 2a x a
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In the given figure the line voltage after a number of reflections will be
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A.
In TE mode the direction of electric field is always and everywhere transverse to the direction of propagation
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B.
In TM mode the magnetic field pattern is always and everywhere transverse to the direction of propagation
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C.
The subscripts is TE and TM designations denote the number of half sine wave variations of the field components in x and y directions respectively.
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D.
TM11 is called the dominant mode.
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