Question: 4 ( b ) Consider a uniform linear array of N isotropic antenna excited with equal magnitude of current and have progressive phase shift .

4(b) Consider a uniform linear array of N isotropic antenna excited with equal magnitude of current and have progressive phase shift . The inter element spacing is d.
i) Derive the Array Factor.
ii) If d=4, find the value of for endfire.
iii) Determine the value of for d=4 if the resultant electric field is maximum at 45 from the axis of array .
4 ( b ) Consider a uniform linear array of N

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