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In this article, a behavioral model for RF vector‐sum phase shifters is developed to estimate their behavioral and guide the phased‐array front‐end system design. According to their building blocks, the model consists of two typical parts, quadrature signal generator and variable gain amplifiers (VGAs). The modeling process for the quadrature signal generator is based on a complex curve fitting method...
A 60-GHz vector summing phase shifter has been implemented in 90-nm CMOS. Using digital tunable current-splitting technique with π-type LPF and T-type HPF, a quadrature adjustable amplitude generator is developed to improve insertion loss and adjust quadrature signals' amplitudes. It has a high Q-factor passive I/Q signal network with wide phase range. In addition, a balun based current-reuse technique...
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