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Design of a 2x2 MIMO Array Front-End for 5G Applications in CMOS Technology

Khademi Sharifabad, Sepehr | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55427 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Fakharzadeh Jahromi, Mohammad
  7. Abstract:
  8. This thesis presents a four-antenna phased-array transceiver front-end for 5G applications. The designed front-end uses RF architecture and time division duplexing mode and operates in the 26~30 (GHz) band. In our design procedure, we have used a four-stage inductively degenerated common source LNA, a differential three-stage PA, and a vector-sum phase shifter. Circuit blocks are connected using traditional architecture, and an SPDT switch is used to determine the Tx/Rx mode of the system. A switching current reference is designed, which enables us to control the circuit gain over different process corners and temperatures.Each transmitter chain produces 13.42 (dBm) power at its operating point, and the receiver chain has a 4 (dB) noise figure. The designed phase shifter is capable of covering the 360 degrees range with 22.5 degrees steps, and the RMS phase error for Rx and Tx chains is 0.82 degrees and 3.05 degrees respectively. 16-QAM and 64-QAM modulations are appropriate for this circuit, and they can cover 1124 (m) and 559 (m) ranges respectively. The total power consumption of this circuit is 665.2 (mW), and its area is about 10 (mm2).
  9. Keywords:
  10. Front-End ; Complementary Metal Oxide Semiconductor Technology (CMOS) ; Phased Array ; Wideband Phased Array System ; Low Noise Amplifier (LNA) ; Power Amplifier ; Single Pole Double Throw (SPDT)Switch

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