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1- A one-meter long wire antenna is center fed by a source with frequency 30 MHz :
i- find the wavelength and the current distribution along the antenna .ii- find the radiation resistance.iii- if the source is now replaced by another with frequency = 150 MHz , find the new current distribution & the radiation resistanceiv- compare between the results for the two sources above and comment.v- design a non-uniform linear array to have the pattern :
E = [(sin(3Ψ/2))/(sin(Ψ/2))]2
where 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 ? (note this one been answerd but there was a mistake from me in typing the question so i resubmit it here)
A barometric pressure transducer is measuring pressure between 800 and 1100 mbars. If the transducer output is scaled to 0-5V and input to the HCS12 ATD confugured in 8-bit mode, what is the pressure measured when the ATD output = 0x5A
Write a short technical report on Frequency Division Multiplexing
Develop a control system to fill a container with water after it is emptied through a stopcock at the bottom. The system must automatically shut off the water when the container is filled.
in step index fiber the core of diameter D has a refractive n1, which is typically equal to 1.48. core is typically surrounded by the cladding of slightly lower index. Where n2=n1(1-delta). The parameter is simply called the index difference.
The gain of the antennas must be increased when the TDMA system described in part (d) is used because the bit rate is higher than with FDMA and the noise power in the receiver is therefore higher
A signal has a fundamental frequency of 1000 Hz. What is its period? Assume the signal has a peak amplitude of 1 Volt and that the instantaneous power is equal to the square of the voltage, then compute the average power of the fundamental frequen..
Calculate the annual average of number of photons within the wavelengths (0.495 um
Use MATLAB to compute the inverse Laplace transform of X(s)=(s^2+2s+1)/(s(s+1)(s^2+10s+50)) and determine the value of x(t) in the steady state. How would you be able to obtain this value without computing the inverse? Explain.
A filter has the following design specifications: Cutoff frequency 1500 Hz Second-order Butterworth highpass filterSallen-Key circuit topology Determine the transfer function and realize it using the Sallen-Key circuit topology
A 10 K-ohm pot is used as a position sensor with a 10 -V supply. The input resistance to the interface circuit is 50 K-ohm. Find the loading error when the pot is in the middle of its range.
The open circuit voltage of the battery is 1.493 V. When a 100 resistor is connected across it, its measured voltage is 1.356V. Find its approximate Thevenin resistance and draw a model for the battery.
A second-order PLL is implemented with a non ideal loop filter: H(s) = (s+a)/(s+b) in which b > 0 is very small. (a) Applying small-signal analysis, determine the transfer function between Oe(s) and Oi(s).
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