Abstract

The paper describes the design and measurement results of a monolithic single chip phase shifter. This broadband, 6-bit phase shifter exhibits very low overall insertion loss with remarkably low variation, good VSWR and exceptional phase performance with only 2.4 degrees RMS phase error over all 64 phase states across the entire 5-6 GHz band. Moreover the di­gital design leads to good stability with regard to temperature and voltage variation. These excellent performance data lead to minimum driver levels and high efficiency in Tx-mode, a distinct reduction of the noise figure in Rx-mode for the complete T/R-module and allow minimum calibration effort of the active phased array.