Q. Voltage standing wave pattern in a loss less transmission line with characteristic impedance 50 Ω and a resistive load is shown in the figure. Reflection coefficient is given by

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Q. The electric field of an EM wave propagating in the z direction given by following equation. The wave is

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Q. The radiation pattern of two element collinear array is represent in

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Q. A lossless transmission line is connected to two identical voltage source as shown in figure. The impedance measured at the midpoint AA' is

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Q. For a quarter wave transformer, characteristic impedance is related with input and load impedances as

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Q. What does the following expression represent?

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Q. For radiation field of an antenna at a distance r varies as

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Q. The attenuation factor α and phase shift factor β for a wave propagated in a good dielectric having σ/ωε >> 1 are given by

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Q. The attenuation constant in case of a transmission line is

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Q. The energy stored in an electric field is given by

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Q. The energy stored in a magnetic field is given by

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Q. The characteristic impedance is given by

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Q. The phase velocity in a transmission line is

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Q. The length of a λ/2 antenna in feet is given by the relation

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Q. The velocity of electromagnetic wave in free space is given by

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Q. In case of concentric conductors of radius a and b the value of capacitance (C) is given by

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Q. The complex Poynting vector for electromagnetic wave.

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Q. Two LOS antennas having power gains of G1 and G2 are separated transmitted power, Pr is received power turn Pr/Pt will be proportional to

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Q. The force acting on a charge q moving with velocity v̅ in a region of electric field E̅ and magnetic field B̅ is

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Q. What is the characteristic impedance Z0 of a line having R, inductance L, capacitance C and conductance G?

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