Design of 60 GHz Vector Modulator Based Active Phase Shifter

Abstract

This paper 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 360 degree. The phase shifter is controlled by 5 bit digitally controlled by binary current weighted DAC. The miniaturized Marchand balun and 2 stage poly phase filter are used to generate differential I/Q signal from single signal. The three CS amplifiers are implemented for providing 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.