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      Noise figure of a balanced amplifier

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      Author
      Coskun, A. A.
      Atalar, Abdullah
      Date
      2018
      Source Title
      IEEE Transactions on Circuits and Systems II: Express Briefs
      Print ISSN
      1549-7747
      Publisher
      Institute of Electrical and Electronics Engineers
      Volume
      65
      Issue
      9
      Pages
      1129 - 1133
      Language
      English
      Type
      Article
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      116
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      Abstract
      Noise figure expression of a balanced amplifier built with lossy divider and combiner and two imperfectly noise-matched component amplifiers is derived analytically using the method of noise waves in terms of the noise parameters of the amplifiers. We present analytical expressions for the three noise parameters of the balanced amplifier. We show that a low-noise amplifier optimized to be used as a stand-alone amplifier is not the optimum choice for the component amplifiers of a balanced amplifier. The derived expressions can be used to choose or optimize the component amplifiers.
      Keywords
      Balanced amplifiers
      Noise figure
      Noise parameters
      Noise temperature
      Permalink
      http://hdl.handle.net/11693/50255
      Published Version (Please cite this version)
      https://doi.org/10.1109/TCSII.2018.2801759
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      • Department of Electrical and Electronics Engineering 3613
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