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Q. A paraboloidal antenna has an aperture ef?ciency of 0.6 and a diameter D = 100λ at 6 GHz. Illumination by the feed is such that the beamwidths of the principal-plane secondary patterns are equal. Determine the antenna's power gain and beamwidth. (Note that the radiation pattern of the feed is called the primary pattern, whereas that of the overall antenna is the secondary pattern.)
Q. If an analog message that has a spectral extent of 15 kHz is sampled at three times the Nyquist rate, determine the sampling rate.
Question: A DC, separately excited motor is supplied from a 240-V source. When the motor is unloaded, it draws 1A of current from the source. When the motor is loaded, it draws
What is the disadvantages of diodes as a series element in a clipper?
Q. Schematic Diagram of LED based System ? As shown in the two schematic diagrams above, the LEDs in a seven-segment display are not isolated from each other. Rather, eith
A linear circuit component is one that has a linear I V characteristic
Q. The circuit shown in Figure is the equivalent circuit of a field-effect transistor (FET) amplifier stage. (a) Determine the y-parameters. (b) For values of µ = g m /g d >
Explain indirect data addressing mode (with examples) available in microprocessors. Indirect Mode: Address given in instruction includes address where the operand resi
Q. The current sources in Figure are given to be I A = 30 A and I B = 50 A. For the values of R 1 = 20 ,R2 = 40 , and R3 = 80 , find: (a) The voltage V. (b) The current
An eight pole dc generator has an armature wound with 768 conductors each capable of carrying 50A without overheating. The emf generated in each conductor is 1.5V. Calculate the th
Importance: The transistor is the main active component in practically all current electronics, and is considered through many to be one of the greatest inventions of the 20 t
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