Design of a Low Power Low Phase Noise 28 GHz VCO for 5G Applications

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Fallah, Hamed | 2019

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 52035 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Fakharzadeh Jahromi, Mohammad
Abstract:
In this thesis, a low-power low-phase-noise 28 GHz voltage-controlled oscillator for 5G applications is presented. At first, to select the best structure in terms of FoM, various types of inductors and transformers have been designed and EM simulated. The class-C structure which leads to the highest FoM is chosen eventually. In order to increase oscillation amplitude and reduce phase noise while preserving FoM, a high-frequency noise filter is presented. This filter which is based on a λ/8 microstrip transmission line has solved the conventional filter problems e.g. narrow bandwidth, coupling with oscillator inductor and practical implementation issues.The oscillator is designed, EM simulated and laid out in 65nm CMOS technology with the frequency tuning range of 27 to 30 GHz (10.5%), consumes 6.7 mW from a 1.2 V power supply and has 2.3 V oscillation amplitude. Its phase noise and FoM at 1 MHz offset of 28 GHz oscillation frequency is -113 dBc/Hz and 193.7 dBc/Hz respectively. The oscillator’s area equals to 0.092 mm2
Keywords:
Voltage Controlled Oscillator ; Phase Noise ; Fifth Generation of Mobile Networks ; Complementary Metal Oxide Semiconductor Technology (CMOS) ; Transmission Lines ; Power Consumption

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