The Influence of Interval Error of Different Interval Index and Weighting Conditions on the Electrical Performance of Active Phased Array Antennas

Strong anti-interference capability and fast beam scanning speed are the main advantages of active phased array antennas (APAA). The key factors to consider when studying the effect of interval error on AP AA electrical performance are its design parameters, such as weighting conditions. The variation of the peak power interval, peak sidelobe level interval, and half power beam width interval of an active phased array antenna is investigated in this paper under array element position error interval, excitation amplitude interval, and phase error interval of different interval index and under different weighting conditions. The results show that as the interval index increases, the deterioration of electrical performance increases. As the Taylor-weighted sidelobe level gradually decreases, the supremum of the peak sidelobe level caused by each parameter error decreases, while the excitation amplitude error causes the infimum of the peak power interval and the supremum of the half power beam width interval to become larger.