This paper illustrates a design of linear array antenna equal space and non uniform excitation using Dolph – Chebyshev method , We will discuss the designing procedure for antenna array having odd or even number of elements at two different values of the major to minor sidelobe level and at various between spaces , we will calculate the excitation coefficients and plot the radiation pattern for each case in addition to calculate both of the half power beam width angel and directivity. Finally : two curves will be plotted : first of them for beam broadening factor as a function of the major to minor sidelobe ratio ,the other one for directivity as a function of the array length.