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1.A base stationcellular communicationsystems lossless antenna has a maximum gain of 16 dB (above isotropic) at 1,900 MHz. Assuming the input power to the antenna is 8 watts, what is the maximum radiated power density (in watts/cm^2) at a distance of 100 meters? This will determine the safe level for human exposure to electromagnetic radiation. 2.The radiation intensity is represented byU = U. sin(π sin θ), 0 ≤ θ ≤ π/2 and 0 ≤ φ ≤ 2π = 0 elsewhereFind the directivity
Wires manufactured for use in a computer system are specified to hve resistances between .12 and .14 ohms. The actual measured resistances of the wires produced by company A have a normal probability distribution with mean .11 ohm
A composite analog signal is given in the following expression: x(t)=1.2 sin(2pi60ft)+0.0001cos(2pi1ft) -If this signal was sampled at 1000 Hz, derive the expression for the sampled sequence x[n] with n being the sampling index.
An AM modulator operates with the message signal m(t) = 6cos(10πt) - 4sin(30πt) with unmodulated carrier: 50cos(30πt) and index of 0.1 Write the equation for mn(t) the normalized signal with minimum value of -1.
define a one-dimensional potential well having energies U as a function of position x as follows: U=infinity for x= -1nm to x=0; U=0 eV for x=0 to x=5nm; U=10 eV for x=5nm to x=7nm; U=0 for x>7nm and x
A transducer with a Thevenin equivalent output resistance, RTH =10 k-ohm and a Thevenin equivalent open circuit voltage of V TH = 1 millivolt must be amplif ied to 5 volts. Using an ideal OpAmp, design a non-inverting amplifier circuit to do this ..
Estimate the size and weight of an 1970 automobile using 1970 electronics technology which would have the equivalent computational power and electronics a typical 2013 automobile.
the -3 dB frequency for low pass Butterworth filter is 2.5 kHz. The stop band begins at 3.8 kHz, with an attention of 35 dB. Determine the minimum order of the filter if the sampling rate is 8 kHz
1. What is the effect of increasing the quantization levels on the quantization error in a PCM signal 2. How can we increase the data rate in a digital signal
a machine processor address a maximum 2^24 bytes of memory. What is the maximum number of 32 bit words that can be store in memory.
When all the heavy machinery is operational, the total electric current flowing into the factory is 5.7 amperes. The phase angle between the voltage and current waveforms is measured to be 4.0 radians. Find the real power dissipated by the factory..
Derive the dynamic model and average value circuit of a buck converter assuming the ESRs of the inductor and capacitor are not equal to zero.
The minimum stopping distance for a car traveling at a speed of 30m/sand is 60 m including the distance traveled during the driver's reaction time of 0.53 s. What is the minimum stopping distance for the same car traveling
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