Design of Low-Noise $K$ -Band SiGe Bipolar VCOs: Theory and Implementation

作者: Fabio Padovan , Marc Tiebout , Koen L. R. Mertens , Andrea Bevilacqua , Andrea Neviani

DOI: 10.1109/TCSI.2014.2364100

关键词: VaricapQ factorDiodeElectrical engineeringEngineeringTransformerBiasingK banddBcPhase noise

摘要: A study of $K$ -band SiGe bipolar VCOs is reported in this paper. The design challenges related to the operation and use a pure technology are discussed with particular emphasis achieving low phase noise while using varactor diodes. Two different have been designed fabricated. In designs, coupled active element by means magnetic transformer avoid tuning voltages exceeding supply voltage. All operated class-C. One designs features dynamic biasing ensure robust start-up conditions. feature as $-$ 137 dBc/Hz at 10 MHz offset from carrier. show state-of-the-art $FOM$ 189 dBc/Hz, an excellent $FOM_{T}$ 193 dB/Hz.

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