Q. A line of characteristic impedance 400 Ω is terminated by a resistance of 400 Ω. The reflected quantities are

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Q. A magic tee is to be used as CW duplexer. Then port 1, port 2, port 3 (E arm), port 4 (H arm) respectively should be connected to

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Q. Wave guides are pressurised above normal atmospheric pressure for

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Q. Assertion (A): In a power divider SH = 0, S21 = 0.707 = S3.

Reason (R): In a power divider the input port (i.e., port 1) is matched and incident power is equally divided in output ports 2 and 3

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Q. Which mode is called dominant mode in rectangular wave guide?

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Q. In a TWT the loss in attenuator is

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Q. To study electromagnetic radiations from astronomical objects, radio astronomers use

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Q. Radar reciever has high sensitivity and low noise figure

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Q. For a waveguide, which of the following statements is wrong?

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Q. A circular waveguide has an infinite set of TE and TM modes.

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Q. In TE and TM modes of rectangular waveguides having propagation in z direction

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Q. The manufacturing technique used to manufacture strip type transmission line is

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Q. An electromagnetic wave can be completely guided by a dielectric rod or slab.

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Q. A transmission line discontinuity is defined as any interruption in the uniformity of the line.

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Q. Interference generated by electrical equipment and automobile ignition systems when observed closed to earth is

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Q. The earliest uses of electromagnetic waves were

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Q. At millimeter wavelength the favoured mode in circular wave guide is

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Q. In laboratory experiment the output from reflex klystron is moderated by square wave because

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Q. In microwave detector used in laboratory measurements of relative power levels, standing wave ratio is about

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Q. Microwaves

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