The main beam maximum of a 10×10 planar array of isotropic elements ( 100 elements) is directed toward θ0=10∘ and φ0=45∘. Find the directivity, beamwidths (in two perpendicular planes), and beam solid angle for a Tschebyscheff distribution design with side lobes of −26 dB. The array is placed on the x−y plane and the elements are equally spaced with d=λ4. It should be noted that an array with bidirectional (two-sided pattern) elements would have a directivity which would be half of that of the same array but with unidirectional (one-sided pattern) elements.
