Single-Sideband Time-Modulated Phased Array With 2-bit Phased Shifters

Abstract

A novel single-sideband (SSB) time-modulated technique with 2-bit phase shifters is proposed. The time-modulated module is implemented by adding periodic phase modulation to 2-bit phase shifters, which is simpler without performance loss compared to existing SSB time-modulated method. During one modulation period, four phase states (0, π/2, π, 3π/2) of 2-bit phase shifters are switched in sequence. After the modulation, the SSB time modulation is realized and the main power is distributed to the first harmonic component. The feasibility of the proposed method is verified by experiments. The undesired harmonics are efficiently suppressed. Meanwhile, ±40 beam scanning range are realized through the proposed module.