A novel multi-octave 5-bit GaAs MMIC phase shifter

Design, fabrication and performance of a novel multi-octave five-bit GaAs MMIC phase shifter is described. The topology was specifically selected to minimize process variations on performance. The topology of 22.5 and 11.25 degree phase shift bits is a reflection type topology with a sharing Lange coupler. Low peak phase error (PPE) (⩽5 degree for 180, 90, 45 degree phase shift bits, ⩽2.5 degree for 22.5, 11.23 degree phase shift bits), low VSWR (±1.5), low insertion loss variations (⩽14±0.7 dB) are exhibited over 5 to 20 GHz frequency range. The chip size of the 5-bit MMIC phase shifter is 4.2 mm×2.96 mm×0.1 mm