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C-band active vector phase shifter MMIC design

This paper presents the simulation results of the C-band active vector-sum digitally controlled phase shifter (VSPS) MMIC which is implemented in 0.18 μm RF CMOS technology. VSPS provides discrete phase control in the range from 0° to 337.5° with 22.5° step achieving 4-bit phase resolution with a 4.5–6.6 dB signal gain. Noise figure is less than 6.5 dB, 1 dB compression point is around −4 dBm. Power consumption is less than 220 mW. The simulation of the phase shifter shows relative phase error <3° in bandwidth 4–6 GHz with a corresponding amplitude error <1 dB.