SUMMARY Statistics such as average power density pattern, variance of the power density pattern and variance of the beam pointing error are developed for a 1 km diameter monolithic transmitter and related to subsystem hardware parameters such as rms phase insertion error and rms RF power level error. Also a limitation was established on the spectral width of the phase reference used in the phase control subsystem. A 1 km transmitter in space appears technically feasible with performance virtually the same as an ideal antenna providing: (1) the total rms phase error on the transmitter does not exceed 10°, (2) the rms amplitude error on the transmitter does not exceed 10%, (3) the spectral width of the phase reference does not exceed^3 kHz. Given such conditions the first sidelobe level would be within 1.5 db of the error free case with 99.99% confidence. Also, the maximum pointing error would be less than 37 meters with 99.99% confidence.
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