Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/48483
Title: DESIGN AND ANALYSIS OF RF MIXERS AND PHASE CONTROL CIRCUITS
Authors: HU ZIJIE
Keywords: RF front-ends, Mixers, Variable gain amplifier, Phase shifters, Phase control circuits
Issue Date: 24-Jun-2013
Source: HU ZIJIE (2013-06-24). DESIGN AND ANALYSIS OF RF MIXERS AND PHASE CONTROL CIRCUITS. ScholarBank@NUS Repository.
Abstract: The design and stability analysis of a subharmonic mixer is firstly explored. A novel biasing scheme is proposed to realize a low-voltage cascode FET subharmonic mixer with relaxed LO power requirements. A systematic stability analysis is subsequently performed, which successfully predicts and eliminates the potential parametric oscillations. To address design issues of CMOS mixers with both wide-RF and wide-IF bandwidths, a cross-coupled Gilbert-cell mixer is presented. An RF bandwidth from 1 to 10 GHz is achieved with a conversion gain of 5.5±2.5 dB, while a conversion gain variation less than 2 dB is measured throughout the 0.1-1 GHz IF bandwidth. Lastly, to address the design issues of wideband CMOS phase shifters with variable phase shift, a novel and simple single-ended configuration is. The CMOS prototype exhibits a measured 3-dB bandwidth of 2-16 GHz, as well as a continuously adjustable phase control of 435º with only one DC control voltage.
URI: http://scholarbank.nus.edu.sg/handle/10635/48483
Appears in Collections:Ph.D Theses (Open)

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