a Matlab package for phased array beam shape inspection
a Matlab package for phased array beam shape inspection
a Matlab package for phased array beam shape inspection
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56 A FIGURES TO CHAPTERS 2–7<br />
ARRAY 50×20 1.50×1.50 δx=0.0° θ=0.00° W=0.68°<br />
ELEMENT JITTER ∆t=1000 ps ∆ψ=81.0° ∆a/a=20.1%<br />
∆AF=−64.5%±1.9 ∆θ=−0.001°±0.025 ∆W=−0.001°±0.018<br />
20<br />
(a) Beam amplitude jitter<br />
20<br />
(b) Beam direction jitter<br />
% / bin<br />
10<br />
% / bin<br />
10<br />
0<br />
−70 −65 −60<br />
∆ AF [%] max<br />
0<br />
−0.05 0 0.05<br />
∆θ [°]<br />
20<br />
(c) Beam width jitter<br />
% / bin<br />
10<br />
0<br />
−0.05 0 0.05<br />
∆W [°]<br />
Figure 24: Jitter simulation 4. Simulated <strong>array</strong> factor jitter in a 50 × 20 element <strong>array</strong><br />
in x-direction, when element timing jitter is ∆t = 1000 ps, the corresponding<br />
element phase jitter 81 ◦ , and the element amplitude jitter is 20% around<br />
1. The undistorted <strong>beam</strong> has been directed in vertical direction, and has<br />
half-power width of 0.68 ◦ in the x-direction.