S-Shaped Conformal ArrayAs far as the S-shaped conformal array is concerned, once again the projection method proves to be an effective mean for pattern recovery. Figure 10 shows the absolute value of the co-polar component of the electric field jE / j of the S-shaped array without and with phase-compensation, normalized with respect to the peak value obtained through simulations for the corrected array: the co-polar component is shown, since the cross-polar one (i.e., jE h j) is well below 230 dB. First of all, as in the previous case it can be noticed that simulations and measurements from the realized prototype (represented in Fig. 11) agree. It can be seen that the main lobe direction changes from 08 to 98 with respect to the linear case, and that the side lobe level has consistently increased from 213.8 dB to 26 dB. The gain of the 1 3 4 undistorted linear array was 11:1 dB, when the array is deformed it becomes 10.5 dB in the new direction of maximum at h59 while it is only 8.2 dB for h50 (the original direction of maximum); after compensation the gain in the desired direction of maximum (i.e., h50 ) increases to 10.8 dB. Applying the projection method the radiation pattern can be recovered: the main lobe direction moves back to 08 and the side lobe level decreases to 211 dB.
CONCLUSION
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