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A 28 GHz radio link uses a tower-mounted reflector antenna with a gain of 32 dB and a transmitter power of 5 W.
(a) Find the minimum distance within the main beam of the antenna for which the U.S-recommended safe power density limit of 10 mW/cm2 is not exceeded.
(b) How does this distance change for a position within the sidelobe region of the antenna if we assume a worst-case sidelobe level of 10 dB below the main beam?
(c) Are these distances in the far-field region of the antenna? (Assume a circular reflector, with an aperture efficiency of 60%.)
Two electrons in an atom are separated by 1.5 * 10^-10 m, the typical size of an atom. What is the electrical force between them?
Two men are sliding a 100-kg crate up an incline. If the lower man pushes horizontally with a force of 500 N, and if the coefficient of static friction is 0.30, determine the tension T which the upper man must exert on the rope to get the crate to..
Q.1. Design a parameterized circuit that have two N-bit un-signed inputs A and B. The N-bit output Y = |A - B|. Test your circuit with 3 sets of inputs; one with A>B, another with A=B, and another with A
Wiring Standards for Photovoltaic, Installations and perform a simpler literature review or basic comparison type of project.
The steering wheel has backlash. This means there is a delay between the time the wheel is turned, and the time the car responds. The driver tends to overturn, which leads to instability and lack of control of the car.
Find the best logical implementation
Three towns A, B & C are situated at the corners of an equivalent triangle of side 30 km. It is proposed to supply power to extent of 30 MW, 10 MW, 20 MW to A, B & C respectively from one substation. Where should substation be located to minimize ..
a wafer 100mm in diameter is mounted in an electron-beam evaporation system in which spherical radius is
Find the output voltage of an amplifier if the applied voltage is 20 mV and a dB gain of 22 dB is attained. a. Determine Vo at a frequency one octave above the critical frequency. b. Determine Vo at a frequency one decade below the critical frequency..
Gratings are often written into photoresist by interference (superposition) of optical beams. In other words, the standing wave formed by the overlap of multiple plane waves produces a (useful) exposure pattern.
Consider the analogue cosine signal y(t) = COS(8.8pit). It is sampled using a sampling interval of T = 0.5 sec. What is meant by the term aliasing in regard to signal sampling What is the minimum sample rate that should be used to avoid aliasing
The length of GaAs laser resonator is L = 165 um; the width and the thickness are W = 10 um and d = 0.1 um. Find the photon round-trip time in this resonator. The refractive index of GaAs is 3.7.
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