A Highly Linear Bidirectional Phase Shifter Based on Vector Modulator for 60ghz Applications
Intelligent Memory Systems(2017)
摘要
This paper presents a phase shifter for beam steered systems at mmW frequencies. It is based on an I/Q hybrid transformer feeding a vector modulator that weights the amplitude of quadrature differential signals. A specific passive attenuator has been designed to improve the attenuation depth, the phase accuracy and the impedance matching. A CMOS 55nm circuit was measured, that covers the 360° phase shift with less than 1 dB gain and 5° phase imbalance. It covers the frequency band from 55 to 67 GHz and paves the way towards mobile millimeter-wave high data rate telecommunication systems.
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关键词
5G mobile communication,phase shifters,vector modulator,60GHz,CMOS
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