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Q. Aconical horn has a side viewas shown in Figure The maximum value ofthe directive gain is given by GD ∼ = 5.13(D/λ)2, where D =√3.33λL1 and L1 = L/(1-d/D),in which d is the inside diameter of the waveguide. Beam widths for the main beam directed along the z-axis are given by θB = 60λ/D in degrees in the yz-plane, and by φB ∼ = 70λ/D in degrees in the xz- plane. Let the circular waveguide, with a 2.5-cm inside diameter, be expanded by adding a conical ?are to have an aperture with an inside diameter of 5.771λ at 8 GHz. For L1 = 10λ, find:
(a) The horn length L.
(b) The directive gain.
(c) The principal-plane beamwidths.
Q. Explain Cellular Telephone Systems? Today radio-based systems make it possible for mobile people to communicate via cellular telephone systems while traveling on airplanes a
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Characteristics of magnetic field / flux lines: i. Forming a closing loop ii. Did not crossed against each other iii. Has a certain direction iv. Repel among one anot
Q. For the circuits shown in Figure, sketch the frequency response (magnitude and phase) of ¯V out / ¯V in .
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What is the disadvantages of diodes as a series element in a clipper?
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Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri
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