The output of a three-element co-linear antenna array operating in a free space environment is combined (after appropriate phase shifting) to maximize the signal received from a particular direction as shown in the figure:If the inter-element spacing is half of the signal wavelength and direction of maximum response is 30° from a line perpendicular to the array, what are the phases to be applied to each element? Consider the first element as the reference.

Question

TuteeHUB · Accepted Answer

$\left[ {0\;\;\;\frac{\pi }{4}\;\;\;\frac{\pi }{2}} \right]$

TuteeHUB · Answer

$\left[ { - \frac{\pi }{3}\;\;\;0\;\;\frac{\pi }{3}} \right]$

TuteeHUB · Answer

$\left[ { - \frac{\pi }{4}\;\;\;0\;\;\frac{\pi }{4}} \right]$

TuteeHUB · Answer

$\left[ {0\;\;\frac{\pi }{2}\;\;\;\pi } \right]$

1.	The output of a three-element co-linear antenna array operating in a free space environment is combined (after appropriate phase shifting) to maximize the signal received from a particular direction as shown in the figure:If the inter-element spacing is half of the signal wavelength and direction of maximum response is 30° from a line perpendicular to the array, what are the phases to be applied to each element? Consider the first element as the reference.
A.	\(\left[ { - \frac{\pi }{3}\;\;\;0\;\;\frac{\pi }{3}} \right]\)
B.	\(\left[ { - \frac{\pi }{4}\;\;\;0\;\;\frac{\pi }{4}} \right]\)
C.	\(\left[ {0\;\;\frac{\pi }{2}\;\;\;\pi } \right]\)
D.	\(\left[ {0\;\;\;\frac{\pi }{4}\;\;\;\frac{\pi }{2}} \right]\)
Answer» D. \(\left[ {0\;\;\;\frac{\pi }{4}\;\;\;\frac{\pi }{2}} \right]\)

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