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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Improvement of Noise Performance in Phased-Array Receivers

  • Kim, Jung-Hyun (School of Electrical Engineering and Computer Science, Hanyang University) ;
  • Jeong, Jin-Ho (Department of Electronic Engineering, Sogang University) ;
  • Jeon, Sang-Geun (School of Electrical Engineering, Korea University)
  • Received : 2010.07.22
  • Accepted : 2010.10.25
  • Published : 2011.04.30
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Abstract

This paper presents a new analytical approach and experimental verification for the improvement of noise performance in phased-array receivers. For analysis purposes, a multi-channel array system is converted into an equivalent single-channel system, such that the two presents the identical signal and noise powers at the output, respectively. We define an effective gain, noise figure, and signal-to-noise ratio in the equivalent system. Through the proposed approach, the noise performance of the array receiver is analyzed in a general and straightforward manner and then compared to that of each individual array channel. In addition, the phase noise of the array system is analyzed in a rigorous manner, showing its effective reduction by a factor of the array size. The predicted improvement of the noise performance is experimentally confirmed with a CMOS integrated phased-array receiver.

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