ECE :: Microwave Communication
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In directional coupler of the given figure, the terms |S14| and |S23| of scattering matrix are nearly
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A line is excited by a 100 V, 200 ohm source and is terminated by 100 Ω resistance. If the voltage on line reaches steady value in 80 ns, the natural resonant frequency is
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A line of length slightly longer than
and open circuited at far end behaves as -
The most commonly used magnetron is
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The effect of earth's magnetic field on radiowaves is minimum when
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A line of characteristic impedance Z0 branches into two line each with characteristic impedance Z0. The refracted voltage is
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The resistance values of a PIN diode under positive bias and negative bias respectively are about
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A PIN diode can be used
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A.
the electric field lines of radio waves and flux line of earth's magnetic field are in the same direction
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B.
the electric field lines of radio waves and flux lines of earth's magnetic field are at right angles
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C.
the electric field lines of radiowaves and flux lines of earth's magnetic field oppose each other
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D.
both (b) and (c)
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