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(a) Some antennas have a physical aperture area A that can be identified and is related to the effective area Ae by Ae = ρaA, where ρa is known as the aperture efficiency. For a circular-aperture antenna with a diameter of 2 m and an aperture efficiency of 0.5 at 4 GHz, calculate the power gain.
(b) Referring to Figure, let two such antennas be used for transmitting and receiving, while the two stations are separated by 50 km. Let the total loss over the link be 9 dB, while the transmitter generates 0.5 W. Find the available received power.
Q. Show NPN Common Base Amplifier? This configuration is used for high frequency applications because the base separates the input and output, minimizing oscillations at h
Electrical power Power P in an electrical circuit is given by the product of potential difference V and current I. The unit of power is the watt, W.
Q. For the low-pass filter configuration of Figure, with R i = R f = 1M, calculate C f such that the 3-dB point is at 1 kHz.
Types of Field-Effect Transistors The channel of a FET (field-effect transistor) is doped to produce either an N-type semiconductor or a P-type semiconductor. The drain and so
a. Describe the meaning of standing wave ratio. What is the formula for it, if the load is purely resistive? Why is a high value of SWR often undesirable? b. Determine how the c
Define the aircraft axes & degrees of freedom. Analyse the different maneuvers that can be done by an aircraft.
if (n n=n+1 else n=n-1 n=0 how to write this command
Data rates in PSTNs: A voice channel in a PSTN is band limited with a nominal bandwidth of 3.1 kHz. A first-cut estimate of this can be attained from Nyquist's theorem that app
what about power genration?
Using star-delta transformation, calculate the current flow through RL.
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