Four-bit W-band switched line phase shifter in 90 nm SiGe
A switched delay line phase shifter implemented in a 90 nm SiGe BiCMOS process utilising PIN diodes is presented. The 4-bit phase shifter utilises four SP4T switches for a simplified architecture. The frequency of operation is from 75 to 100 GHz, and the simulated input referred P1dB is 28.5 dBm. This type of phase shifter is especially suitable for high power transmit linear phased arrays. The chip occupies an area of 2.76 mm2 including the pads.