Loading...

Design and Implementation of a Voltage Controlled Oscillator For 77GHz Automotive Radar

Kiavar, Amir Arsalan | 2021

1294 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54434 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Medi, Ali
  7. Abstract:
  8. Wideband mm-wave radars are gaining popularity in automotive applications due to their superiority in harsh weather conditions, high distance resolution, precise velocity measurement, and superior spatial resolution. The primary purpose of this thesis is to design and implement a voltage-controlled oscillator for 77GHz automotive radar applications.Phase noise -as one of the most crucial specifications in VCO design- Phase noise improvement techniques as well as harmonic engineering methods are delineated. Also, an Ocean-based code for ISF simulation is introduced and developed to obviate the need for additional signal processing software so that simulation speed increases considerably.Transformers are becoming inseparable elements of any radar system because of their numerous merits. However, most semiconductor companies do not offer transformers in their PDK libraries. AEL based transformer layout functions are introduced to increase circuit design speed.With the benefit of discussed harmonic engineering, an assortment of VCO classes is presented which prompts a better understanding of VCO classes. Besides, two novel classes of oscillator named B2-PD and SF3 are proposed.Finally, the impact of KVCO error on PLL linearity is shown utilizing KVCO error modeling and loop simulation. Based on this simulation and Phase noise improvement methods, a K-band class B2 VCO with Transformer based buffer is designed and EM simulated in 65nm CMOS. The proposed VCO achieves a 13.3% tuning range with -98.8 dBc/Hz worst-case phase noise at 1MHz offset in 77GHz
  9. Keywords:
  10. Voltage Controlled Oscillator ; Oscillators ; Differential CMOS Oscillator ; Impulse Sensitivity Function (ISF) ; 77GHz Automotive Radar ; Frequency Modulated Continuous Wave (FMCW) ; Low Noise Oscillator ; Class SF3 Oscillator ; Autopilot ; Harmonic Engineering

 Digital Object List

 Bookmark

...see more