Equation 29 can be readily solved by computer simulations to generate the complete SPS beam pattern with phase control at the subarray level as shown in Fig. 8. Centered at each grating lobe position is a replica of the main beam pattern multiplied by the subarray pattern. 4. GRATING LOBE ANALYSIS FOR POWER MODULE PHASING The original SPS reference system documented in the October 1978 DOE/NASA report had phase control to the 10.4328 by 10.4328 m subarray level. As a result of further system studies, the present reference plan recommends that phase conjugation be performed at each of the 101,552 power modules rather than the 7220 subarrays. The
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