May 2024
Intermediate to advanced
309 pages
13h 33m
English
Content preview from Data Communications and Computer Networks by Pearson
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80 Data Communications and Computer Networks
delayed waves can come out of phase with the direct wave leading to cancellation of the signal. This
phenomenon is known as the multipath fading effect.
Microwaves require unidirectional antennas that transmit signal only in one direction. Two such
antennas are dish antenna and horn antenna (see Figure 4.18). A dish antenna works based on the
geometry of a parabola. All the lines parallel to the line of sight when hit the parabola, they are reflected
by the parabola curve at angles such that they converge at a common point called the focus. The dish
parabola catches many waves and ...
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