Loading...

Design of a DDS-Based Frequency Synthesizer for MMW Imaging System

Ghazanfari, Saman | 2022

180 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54889 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Fakharzadeh Jahromi, Mohammad; Shabany, Mahdi
  7. Abstract:
  8. Nowadays, frequency synthesizers are widely used in many modern devices due to the ever-increasing growth of electronic circuits and their applications in various aspects of life. Imaging devices with security applications in the millimeter-wave frequency band is one of the mentioned applications. To prevent crowds at checkpoints and facilitate traffic, these devices need to monitor people's security at the highest possible speed. Furthermore, significant bandwidth is required to increase image quality. Therefore, using frequency generators with high-speed frequency sweep ability is a great advantage. In this thesis, a digital frequency generating chip with 1GHz bandwidth is designed using 65nm CMOS technology with an active area of 〖0.129mm〗^2. The minimum simulated SFDR value over the whole signal bandwidth is 42.6dB. The total power consumption is 24mW, a value which is smaller compared to similar works. A commercial digital frequency generator chip has also been used to design a PCB to use in the first ever millimeter-wave imaging system designed in Iran. The fabricated board has a smaller size than the evaluation board provided by the chip manufacturer and benefits from various features such as current sensors and CAN communication protocol.
  9. Keywords:
  10. Direct Digital Synthesizer (DDS) ; Frequency Synthesizer ; Millimeter Wave ; Millimeter-Wave Imaging ; Complementary Metal Oxide Semiconductor Technology (CMOS)

 Digital Object List

 Bookmark

No TOC