S-Band MMIC Active Module with Small Phase Variation and Low Insertion Loss for Beamforming Network

摘要

This paper describes a monolithic microwave integrated circuit (MMIC) active module with small phase vari- ation and low insertion loss for beamforming network in S-band. The MMIC active module composed of a digital phase shifter, a digital attenuator and a buffer amplifier, has characteristic to control amplitudes and phase shifts by using digital control sig- nals. By using the digital attenuator, the MMIC active module has obtained the excellent performances. This paper also de- scribes the exact on--state resistance of FET switch for designing the digital attenuator.