0 50 100 150 200 250 300 35000.511.5θ oF(θ)0 10 20 30 40 50 60 70 80 90 1000.50.60.70.80.91.511.11.21.31.4 When you plot the | F(theta)|, you shall notice that at theta=0, F(0)-Æ 0 (taking the limit) The sidelobe level (SLL) = 1/1.4 = 0.71 The Half power level is 1.4*0.707 = 1 (This happened to be the same as the level of sidelobe which is not generally the case). HPBM = 57-24.7=32.3
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