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A full 360° vector-sum phase shifter with very low rms phase error over a wide bandwidth

Asoodeh, A ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1109/TMTT.2012.2189227
  3. Publisher: 2012
  4. Abstract:
  5. An innovative vector-sum phase shifter with a full 360° variable phase-shift range in 0.18-μm CMOS technology is proposed and experimentally demonstrated in this paper. It employs an I/Q network with high I/Q accuracy over a wide bandwidth to generate two quadrature basis vector differential signals. The fabricated chip operates in the 2.3-4.8 GHz range. The root-mean-square gain error and phase error are less than 1.1 dB and 1.4° over the measured frequency span, respectively. The total current consumption is 10.6 mA (phase shifter core: ∼2.6 mA) from a 1.8 V supply voltage and overall chip size is 0.87 × 0.75 mm 2. To the best of the authors' knowledge, this circuit is the first demonstration of microwave CMOS phase shifter with very low phase error over a wide bandwidth employing the vector sum method for all monolithic microwave integrated circuit phase shifters with 360° phase-control range to date
  6. Keywords:
  7. CMOS analog integrated circuit ; Differential amplifier ; I/Q network ; phased array ; Active phase-shifter ; Basis vector ; Chip sizes ; CMOS analog integrated circuits ; CMOS technology ; Differential signal ; Fabricated chips ; Gain errors ; Phase error ; Root mean squares ; Supply voltages ; Total current ; Vector sum method ; Wide bandwidth ; Antenna phased arrays ; CMOS integrated circuits ; Differential amplifiers ; Linear integrated circuits ; Bandwidth
  8. Source: IEEE Transactions on Microwave Theory and Techniques ; Volume 60, Issue 6 PART 1 , 2012 , Pages 1626-1634 ; 00189480 (ISSN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6177291