A Monolithic Single-Chip C-Band 6-Bit Phase Shifter

This paper describes the design and measured results of a monolithic single chip phase shifter for active phased array applications. The broadband, 6-bit phase shifter exhibits very low insertion loss, good VSWR and exceptional phase performance with only 3.6 degrees RMS phase error over all 64 phase states across the entire 4 - 8 GHz band. Compared to other designs this chip is optimized for lowest insertion loss variation over all phase states to allow minimum calibration effort of the active phased array. The chip is prepared for the integration of the driver circuits controlling the individual phase shifter bits.