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Hi all,

I have a problem to firstly understand and secondly solve this problem :

here is the Problem :

Consider three (coherent) antennas variously arranged on the x-y-plane where each individual antenna radiates an isotropic electric field E(x).

1 - Write down an expression for the far-field power-pattern of the antenna array in the x-y-plane.

2 - Configure the phase of each individual antenna in such a way, that the resulting power-pattern of the antenna-array will have a maximum at a chosen angle α .

3 - plot the normalised power-pattern as polar-plot both in natural- and logarithmic scale for at least two different look-angles.

E

[/B]

Z = 0

I have a problem to firstly understand and secondly solve this problem :

here is the Problem :

Consider three (coherent) antennas variously arranged on the x-y-plane where each individual antenna radiates an isotropic electric field E(x).

1 - Write down an expression for the far-field power-pattern of the antenna array in the x-y-plane.

2 - Configure the phase of each individual antenna in such a way, that the resulting power-pattern of the antenna-array will have a maximum at a chosen angle α .

3 - plot the normalised power-pattern as polar-plot both in natural- and logarithmic scale for at least two different look-angles.

## Homework Equations

E

_{i}(r,t) = E_{0}(x_{i})e^{i(k.r - ωt + kxi sin(θ))}## The Attempt at a Solution

[/B]

Z = 0

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