A Novel MMIC X-Band Phase Shifter

A novel configuration for monolithic phase shifters is presented. The layout and fabrication of a single chip, four-bit X-band phase shifter, measuring 3.7 x 2.3 mm, is described in some detail. The first samples to be assessed exhibited full 360° coverage at the design frequency, operation throughout X-band, good matches, and an insertion loss less than 5 dB.