a small modification is made to account for the unique method of RF power distribution in this system. The current concept of such a system includes a transmitter having a quantized power distribution established by an array of individually excited 18 meter x 18 meter subarrays. Amplitude and phase variations within a subarray would be so slight as to be of no significance (reference 9). However, the variation from subarray to subarray would be significant. Random error in setting the excitation of each of the subarrays is likely to be uncorrelated (the correlated errors are predictable and could be corrected by the RF power distribution system) which justifies a significant simplification of the required analysis. Such an analysis is presented in Appendix I which essentially follows the same procedure as described in references 16 and 18. The analysis of Appendix I, however, includes the necessary modification to account for the use of large and directive radiating elements (18m x 18m subarrays) instead of non-directional isotropic radiating elements. One result of this analysis is an expression relating the average power pattern at the receiver to the rms amplitude and phase errors given by, where, G(x0, y ) is the overall array gain with no phase or amplitude errors (includes quantization effects.) Gsa(x0, y0) subarray gain pattern for uniform power distribution on subarray.
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