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i- A 3-element uniform linear array with inter-element spacing of λ/2 is operated as a broadside array ,find the directions of null radiation , find the direction and the relative level of the side lobe .ii- if the peak radiation is to rotate by 30 degrees off the broadside direction , what should be the current phasing ?iii- design a non-uniform linear array to have the pattern :E = [(sin(3Ψ/2))/(sin(Ψ/2))]2where Ψ=πcosφ , and φ is measured from the array line , namely find the number of elements , the element spacing , and the current amplitudes , also what is the relative side lobe level ?
Provide a simple class definition and then provide the syntax and the rationale for declaring an array of objects of the class. Also explain the dimension of the array and why you chose that number of elements for the object array.
The output capacitor in a certain resonant converter sees the net current equal to 40cos(50,000 pi t) A. What value of capacitance will be needed to keep the voltage variation below 5V peak-to-peak
A photoelectric surface has a work function of 4eV. What is the maximum velocity of the photoelectrons emitted by light if frequency 10^15 Hz incident on the surface h = 6.6 * 10^-34 Joules-second e = 1.6 * 10^-19 Coulomb
A sensor voltage vi from a sensor is amplified using the amplifier depicted below on the basis of the following specifications: R1 = 3.9 kW ±0.5%; R2 = 100 kW ±0.5%; |Voff|
The lattice constant of GaAs is a =5.65 angstrom. (a) Determine the number Ga atoms and As atoms per cubic centimeter.
Using MultiSim (I am somewhat familiar with this program), connect the circuit drawn in Step 1 using AND gates, NOR gates, and inverters. Connect a logic switch to each input and an LED monitor to the output.
X & Y are Gaussian random variables with E[X]=1, E[Y]=2, E[XY]=.1, VAR[X]=5 & VAR[Y]=10. Define the vector V=(matrix) 1 1;1 -1 matrix X;Y. Find the mean of E[V], covariance martix for V, use matrix notation
Define static electricity and State five sources of static electricity and Describe three methods used to reduce hazards due to static electricity
A two-resistor voltage divider consists of a 10 k and a 15 k ohm resistor, with the 10 k resistor connected to the voltage source and the 15 k resistor connected to ground. If the output voltage is 2.5 V across the 10 k resistor
Calculate the standard enthalpy change for the reaction of an aqueous solution of barium hydroxide, Ba(OH)2, with an aqueous solution of ammonium nitrate, NH4NO3, at 25°C. The complete ionic equation is
A transformer has 100 turns on the primary (terminals 1-1') and 200 turns on the secondary (terminals 2-2'). A current in the primary causes a magnetic flux, which links all turns of both the primary and the secondary.
1. which would have a higher line reactance in ohms. An overhead 138KV line or an overhead 34KV line. Why. 2. Does line charging amps increase or decrease with line length. Why
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