Question

It is desired to design a broadside uniform linear array with the elements placed along the x-axis. The design requires a total length (edge-to-edge) of the array is 42 and the spacing between the elements must be A/2. Determine the: (a) Number of elements of the array (b) Half-power beamwidth (in degrees) for the uniform broadside array. (c) Maximum directivity (dimensionless and in dB) for the uniform broadside array. (d) Side lobe level (in dB) of the uniform broadside array. e) Total excitation coefficients if the linear array is a binomial broadside design (normalize the coefficients so that those of the edge elements are unity). (1 Half-power beamwidth (in degrees) if the linear array is a binomial broadside design g) Maximum directivity (dimensionless and in dB) if the array is a binomial broadside design. (h) Sidelobe level (in dB) if the linear array is a binomial broadside design.

Answer 1

Theas N Cese,+o-y - O.443 Cos COs O.443 4 O.443 Cas 4.5 95.6496- 84.3504 Cas = COs tt2992 2N(=2( = 9= 9.5424 dR - 2A SLL = -13.26dB 28 T0 / 2=56 29 HPBW = 24.4725 O-3748 dod N-I 2N-2N2N-C2N N-oeN-1232N-2N- 2N-2N2N- C2N-N-2-13(2N N- 10 lo 0 =7.06748 5.0922 oy 1-77( 5.31 ol3 - 시고 E7.2509 dB 77 77 (N because d SLL = to = -o0