Abstract
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) (/spl les/5 degree for 180, 90, 45 degree phase shift bits, /spl les/2.5 degree for 22.5, 11.23 degree phase shift bits), low VSWR (/spl plusmn/1.5), low insertion loss variations (/spl les/14/spl plusmn/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/spl times/2.96 mm/spl times/0.1 mm.
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