Ku-Band GaAs-MMIC Digital 8-Bit Phase Shifter

Authors: Schukin V. E., Ketov R. S., Miller Yu. A., Luzhaytsev D. A., Turov A. O., Shimanovskiy D. S.

Annotation: This paper presents the rationale for the chosen circuit designs and describes the development process of a GaAs monolithic microwave integrated circuit (MMIC) for a digital phase shifter intended for Ku-band operation. This phase shifter, featuring eight switchable states, can be used in transmit/receive modules (TRMs) of an airborne radar with an active phased array antenna (APAA). The work focuses on circuit design solutions, component integration, and performance optimization of the phase shifter, ensuring high phase accuracy and low insertion and return losses for the developed integrated circuit. The simulation results are presented, confirming the phase shifter's compliance with the specified technical requirements. Further stages include production and experimental study of the developed device, taking advantage of the increased number of phase shift states.

Keywords: monolithic integrated circuit, microwave semiconductor integrated circuit, phemt, gaas, microwave, active phased array antenna, switched phase shifter, digital phase shifter