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Problem 1: Antenna gain is usually given in relation to an isotropic antenna (radiating/receiving equally in all directions). It can be shown that the effective area of such an antenna is Aiso = λ2/4π.
Compute the antenna gain Gpar of a circular parabolic antenna as a function of its radius r, where the effective area is Ac = 0.55 A is the physical area of the opening.
Problem 2: When communicating with a geostationary satellite from Earth, the distance between transmitter and receiver is approximately 35,000 km. Assume that Friis' law for free space loss is applicable (ignore any effects from the atmosphere) and that stations have parabolic antennas with gains 60dB (Earth) and 20dB (satellite), respectively, at the 11-GHz carrier frequency used.
a. Draw the link budget between transmitted powers PTX and received power PRX.
b. If the satellite receiver requires a minimum received power of -120 dBm, what transmit power is required at the Earth station antenna?
certain digital communication schemes use redundancy in the form of an error control code to improve the reliability
Convert the designed prototype filter to highpass filter with cutoff frequency f_C=10,000 Hz, with 30 db attenuation at f_S=1000 Hz. Determine the transfer function of the filter.
you want to send music to the dorms with 15 khz of am modulation frequency on a carrier of 1090 khz.if the carrier
A propagating electromagnetic wave is described as follows (inset your own equation for Electric field). Determine if the wave is linearly polarized, left-hand elliptic polarized, right-hand elliptic polarized, left-hand circular polarized, or rig..
he armature at the other end of thecommutator is tapped and connected to balanced 3-Phase voltages, sothat a rotating field is produced, The speed of this rotating fieldis 3000 r.p.m. (1) clockwise and (2) anticlockwise,.Find thefrequency of the b..
If the use of the passive signconvention is specified, find the: (a) complex voltage that results when the complex current 4e^(j800t) is applied to the series combination of a 1mF capacitor and a 2-ohm resistor.
design the controller and estimator so that the closed-loop unit step response to a command input has a rise time tr
A 50 Hz, 440 V, 3-phase , 4-pole induction motor develops half the rated torque at 1490 r.p.m. with the applied voltage magnitude remaining at the rated value, what should be its frequency if the motor has to develop the same torque at 1550 r.p.m.
In spherical Coordinates the potential of a dipole lacated at the origin is given by: a) use \(E = -grad \phi\) and the above to calculate E for a dipole located in free space.
Overflow occurs when a result is too large to be represented accurately given a word size. Underflow occurs when a result is too small to be represented correctly (for example, a negative result while doing unsigned arithmetic.).
rc ciruit current course 3u-t a in parrallel to 6k ohm resistor and 5uf cap. determine the instantaneous power
kindly show me full and clear steps how you will sketch and how you get the final results. ltbrgt ltbrgtand send me
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