Do Problem for a uniform-phased cosinusoidal amplitude distributionand compare your result...

Do Problem for a uniform-phased cosinusoidal amplitude distribution

and compare your results with those obtained in Example 11–13 for a uniform field distribution.

Problem:

Assume that the field in an a × b rectangular aperture in an xy-plane is linearly polarized in the y-direction and that the aperture excitation has a uniform phase and a triangular amplitude distribution

Find (a) the pattern function in the xz-plane, (b) the half-power beamwidth, (c) the location of the first nulls, and (d) the level of the first sidelobes. Compare the results with those obtained in Example 11–13 for uniform field distribution.