Electrical Engineering Answers

The instantaneous electric field intensity vector of a wave travelling in a lossy nonmagnetic medium is given by V/m (t in s and y in m). The magnetic field of the wave lags the electric field by . Under these circumstances, find
(a) relative permittivity and conductivity of the medium;
(b) the complex propagation coefficient;
(c) the instantaneous magnetic field intensity vector;
(d) the time-average Poynting vector of the wave.

Derive the Fourier Transform of a rectangular pulse by
a) Differentiating the pulse to form two delta functions
b) Fourier Transforming the derivative
c) Integrating in the frequency domain by dividing by j2πf

Repeat this procedure for the triangle function using a double derivative.

Hence or otherwise, show that if a function has discontinuities in the nth derivative, the sidelobes will fall off as 1/(f^(n+1)).

Design a rectangular air-filled waveguide to be operated at 6 GHz, then, redesign it to be
operated at 12 GHz. The operating frequency must lie in the middle of the operating band.
Calculate the guide dimensions, the attenuation constant in dB/m, and the maximum
transmitted power assuming the maximum electric field is one-half of the dielectric strength of
air. Assume copper walls with conductivity σ = 5.8×10 7
S/m.
.

a) Illustrate how XY-routing scheme routes a message from P(5, 1) to P(2, 3) in a 4X4 2D mesh.
b) Illustrate how E-cube routing scheme routes a message from P0000 to P1111 in a 4-D hypercube.

How can one calculate the 3-db break frequency,low- frequency breakpoint ,mid-band input resistance, ultimate rate of attenuation of an amplifier circuit. Feel free to give a circuit example thanks.

Did the ultrasonic sensor detect the water has an obstacles????