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Design a continuous antenna array to have the following soace factor :
[(sin(2πcosθ))/(2πcosθ)] , at a wavelength λ=.5 m
namely,find :
i- the current distribution and the length of the array.
ii-the relative side lobe level.
iii- the beam width to the first null.
After driving a portion of the route, the tap tap is fully loaded with a total of 24 people including the driver, with an average mass of 70kg per person. In addition, there are three 15kg- goats, five 3kg- chickens, and a total of 25kg of bananas..
What is the minimum level of the positive envelope for an AM signal with an unmodulated peak carrier level of 30 V and 80% modulation
What is the difference between a D flip-flop and a J-K flip-flop How does the number of inputs affect the possible synchronous states of a flip-flop (Set, Reset, Hold, Toggle)
You are given a black box, a 6 k Ohm resistor, a 40 nF capacitor, a voltmeter, and an ammeter. With these supplies you complete the following measurements at 950 Hz: You place the resistor and capacitor in series and measure a current flowing.
A non inverting op-amp circuit with a gain of 96 V/V is found to have a 3-dB frequency of 8 kHz. For a particular system application, a bandwidth of 24 kHz is required. What is the highest gain available under these conditions
A 74.6-kW, three phase, 440-V (line to line), four pole, 60-Hz induction motor has the following (per phase) parameters referred to the stator circuit: Rs=0.06-Ω, Rr=0.08-Ω, Xs=0.3-Ω, Xr=0.3-Ω, Xm=5-Ω The no-load power input is 3240-W at a current ..
Suppose a signal is sampled at 1 kHz and you compute the DFT of the signal using 1000 signal samples. What frequency in Hz corresponds to the 150th value of the DFT
An abrupt silicon pn junction at zero bias has dopant concentrations of Na = 1017/cm3 and Nd = 5 x 1015 cm-3 at T = 300K. (a) Calculate the Fermi level on each side of the junction with respect to the intrinsic Fermi level.
A six pole, 400 V d.c. motor draws 110 A from the supply. The shunt field resistance is 200 Ohm and the armature resistance is 0.5 Ohm. The armature is wave wound with 600 conductors operates at a speed of 1200 rev/min when supplying full load.
1- If the diameter of a spherical water droplet is 100.0 µm, how much energy is required to increase the diameter of the water droplet by 3.0 µm The surface tension of water is 1.0 x 10-3 J/m2. 2- A metal crystallizes in a face-centered cubic lat..
Give a brief explanation of the concept of a priority encoder. Using this, what would be the binary output for a 10-input priority encoder when inputs 7 and 5 are activated What is the binary output (active-high) Active-low
A silicon diode with a breakdown voltage of 2000V that is conducting a forward current of 2000A is turned off with a constant diR/dt=250 A/s. Roughly estimate the time required for the diode to turn off.
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