Design of a 28GHz Phased Array Receiver Front-end for 5G Applications

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Hamzeloui, Sara | 2018

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 51110 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Fakharzadeh Jahromi, Mohammad
Abstract:
Design of a 28GHz phased array receiver front-end for 5G applications in CMOS 0.18um technology in the frequency band from 27.5 to 28.3 GHz is presented in this thesis. We use an RF phase shifting structure which consists of a low-noise amplifier, a phase shifter and a power combiner. The low-noise amplifier is designed using common-source cascode topology with a transformer-based gm-boosting technique in order to enhance the power gain and reduce the noise figure. A vector sum phase shifter is then designed to further enhance the gain. A Wilkinson power combiner with lumped elements is designed as the power combiner. The results of simulating a single RX chain shows a maximum of 15 dB gain and a minimum of 4 dB noise figure in the desired band-width. RMS phase and gain error are 0.7 dB and 3.2°, respectively with a phase shift range of 360°. Power consumption of the single RX chain is 36.2 mW. Results of simulating a 4-channel receiver front-end are also presented in which the average beam pointing error and beamforming loss is 0.7° and 0.5 dB, respectively
Keywords:
Power Combiner ; 5th Generation Cellular Network ; Low Noise Amplifier (LNA) ; Receivers ; Phased Array ; Phase Shifter Circuit ; Receiver Front-End

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