60GHz active vector modulation active phase shift

2011 Sixth IEEE International Symposium on Electronic Design, Test and Application，Ki-Jin Ki&K. H. Ahn；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 Sparameter measurement is 9 dB while drawing 50 mA from a 1.2 V supply.

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