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In nonuniform time-modulated array (NTMA), despite modulating the antenna elements with nonidentical modulation frequencies, some harmonics may overlap in space at a particular frequency. In this paper, considering the overlapping and nonoverlapping nature of the radiated harmonics, the mathematical formulations for calculating the total sideband power ( PSR ) loss of nondegenerate NTMA (ND-NTMA) and degenerate NTMA (D-NTMA) using pulse shifting strategy are presented. Employing the derived closed-form expressions, the effect of shifting the pulse position on  PSR  is studied. It is investigated that, though the  PSR  of ND-NTMA does not depend on the shifted pulse position, for D-NTMA, it depends on the intersected switching time duration of the pulses. Through representative numerical results, it is shown that the derived expression is useful to accurately calculate the total sideband power of NTMA with pulse-shifting strategy.

Effect of Pulse-Shifting on Calculating Sideband Power Losses in Non-uniform Time-Modulated Array