In a uniform linear array, four isotropic radiating elements are spaced /4 apart.The progressive phase shift between the elements required for forming the main beam at 60 of the end fire array is

In a uniform linear array, four isotropic radiating elements are space

1.	In a uniform linear array, four isotropic radiating elements are spaced /4 apart.The progressive phase shift between the elements required for forming the main beam at 60 of the end fire array is
A.	radians
B.	<table><tr><td rowspan="2"> </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> </center></td><td rowspan="2"> radians </td></tr><tr><td style="text-align: center;">2</td></tr></table>
C.	<table><tr><td rowspan="2"> </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> </center></td><td rowspan="2"> radians </td></tr><tr><td style="text-align: center;">4</td></tr></table>
D.	<table><tr><td rowspan="2"> </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> </center></td><td rowspan="2"> radians </td></tr><tr><td style="text-align: center;">8</td></tr></table>
Answer» D. <table><tr><td rowspan="2"> </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> </center></td><td rowspan="2"> radians </td></tr><tr><td style="text-align: center;">8</td></tr></table>

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In a uniform linear array, four isotropic radiating elements are spaced /4 apart.The progressive phase shift between the elements required for forming the main beam at 60 of the end fire array is

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