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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?
When placed in series a coil and capacitor resonate at a fequency of 2251Hz and when placed in parallel they resonate at a frequency of 2228Hz. At parallel resonance it is also found that a current of 0.005A flows from the supply when the supply i..
The Y-Connected synchronous motor whos nameplate is shown in Figure 1 has a per-unit synchronous reactance of 0.9 and a per-unit resistance of 0.02. a.) What is the rated input power of this motor
1)how would two 50μF capacitors be connected to provide atotal capacitance 100μF. 2) Determine the total capacitance and maximum voltage rating for two 220μF, 300-V capacitors connected in series.
Implement the following function with a 4-to-1-line multiplexer Draw the truth table and the corresponding block diagramfor the MUX F(x,y, z) = f(1, 2, 6,7)
A spherical shell is 20 cm thick, with an inner radius of 40 cm. If the charge density is given by 10.4 ×10-3 C/m3 a) Find the total charge Q and Explain why this value of Q is irrational (from a physical, not just mathematical, point of view
V1(18V) R1(1k) R2 (1.5k) R3 (2k)How does the ratio V2 V1 compare to the raioR2 R1?How does the ratio V3 V1 compare to the raioR3 R1 Add the measured voltage V1 V2 and V3 How does this value compare to the value Vt
The following functions are specified as the real part of impedance function Z(s) - Find the function Z(s).
Given f1(t) = 28.2843 cos ( 100t - 30) and f2(t) = 14.1421 sin (100t + 15), what's the phasor value of f1(t), F1 and f2(t), F2 The sum of f1(t) and f(2)t is f3(t), where f3(t) = Fm cos(100t - theta)
A 110 V rms, 60 Hz source is applied to a load impedance Z. The apparent power entering the load is 120 VA at a lagging power factor of 0.707. Calculate the reactive power in the load.
The current in the bulb depends on the time t according to the relation I = (0.807 A) sin [(272 rad/s)t]. (a) What is the frequency of the alternating current (b) Determine the resistance of the bulb's filament. (c) What is the average power deliv..
Calculate the total capacitance of the structure that consists of a dielectric inserted between two conductive parallel plates that are separated by adistance 3d. The dielectric of thickness d is inserted in the center of the structure.
A 150-KW, 300 V shunt generator has Ra= 0.1ohms and Rf=60ohms, If the generator operates at the rated voltage, calculate the induced voltage at (a) full-load (b) half-full load (which means the load current is half)
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