Design of 60 GHz Vector Modulator Based Active Phase Shifter

Thispaper presents a design of 60 GHz active phase shifter for next generation mm-Wave WPAN using 90 nm TSMC CMOS technology.The vector modulator based phase shifter is chosen as a prototype because it provides accurate resolution over wide bandwidth. The phase shifter is controlled by binary current weighted 5-bit DAC. A miniaturized Marchand balun and a 2-stage poly phase filter are used to generate differential I/Q signal from mm-Wave single input. The three CS (Common Source) amplifiers are adopted for providing enough gain to the proposed circuit. The measured phase resolution of the circuit is 11.250 with maximum 30 phase error. The peak gain from the S-parameter measurement is 9 dB while drawing 50 mA from a 1.2 V supply.