A WIDEBAND CMOS PHASE SHIFTER WITH A PHASE TUNING BIT FOR Ku-BAND MOBILE SATELLITE COMMUNICATION

This article presents a Ku-band switched path type phase shifter in a standard 0.13 mu m CMOS technology. The phase shifter consists of phase shifting filter networks, DPDT and SPDT switches, a tuning bit, and digital control logic. The phase coverage of the phase shifter is 354 degrees with the LSB of 5.625 degrees. The measured insertion loss is less than 16 dB. The input and output return losses are more than 12 dB. The RMS phase error and amplitude variation are less than 7.6 degrees and 0.3 dB at 10.7-15 GHz, respectively. When the tuning bit is activated, the RMS phase error of 6.3 degrees and the RMS amplitude variation of 0.4 dB are achieved at 10.7-15 GHz. The input P1dB over approximate to 11 dBm is achieved at 10-15 GHz. The current consumption is nearly zero with 1.2 V supply voltage. The chip size is 1.46 x 0.82 mm(2) including pads. (c) 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2120-2124, 2013