1 / 26

Senior Capstone Project: Fast Tuning Synthesizer

This senior capstone project involves designing a frequency synthesizer for the 3.4 GHz to 4.6 GHz range with specific characteristics such as fast tuning time, low output spurs, and precise output power. The project utilizes both direct and indirect synthesis approaches, incorporating phase-locked loops for stability. Detailed work includes creating Chebyshev filters, addressing parasitic effects, and optimizing component values for better performance. The system aims to meet stringent standards for C, X, and KU Band channels, crucial for military satellite communications. The project outcome encompasses achieving desired output frequencies using an external 100 MHz reference signal with minimal tuning time and high output quality.

rcaballero
Download Presentation

Senior Capstone Project: Fast Tuning Synthesizer

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Senior Capstone Project:Fast Tuning Synthesizer Member: Nathan Roth Advisors: Dr. Huggins Dr. Shastry Mr. James Jensen Date: December 9, 2003

  2. Presentation Outline • Project Summary • Standards and Patents • Functional Description • Detailed Description • Preliminary Laboratory Work/Results • Preliminary Bill of Materials • Preliminary Spring Semester Schedule

  3. Project Summary • Creation of a frequency synthesizer • Use of direct synthesis approach • Design of synthesizer using indirect synthesis • Use of phase-locked loops

  4. Project Summary • Desired Characteristics • Output Frequency Range of 3.4 GHz to 4.6 GHz • Step Size of 50 MHz • Output Power of 0 dBm, ± 3 dB • Output Spurs < -45 dBc • Tuning Time < 500 ns, 200 ns if possible • Use of an External 100 MHz Reference Signal

  5. Project Summary • Actual Characteristics • Output Frequencies of 3650, 3700, 3850, 3900, 4450, 4500, 4650, and 4700 MHz • Output Power of 0 dBm, ± 3 dB • Output Spurs < -45 dBc • Tuning Time < 500 ns, 200 ns if possible • Use of an External 100 MHz Reference Signal

  6. Standards • Standards • Depends Upon Application • C, X, and KU Band Channels: • MIL-STD-188-164 • Military Satellite Communications (MILSATCOM): • MIL-STD-188-166: Interface Standard • MIL-STD-188-167: Message Format • MIL-STD-188-168: Interface for Satellite Multiplexers and Demultiplexers

  7. Patents • Patent Number 5,166,629 • Grant Watkins and John Muhlbair of Westinghouse Electric Corporation on November 24, 1992

  8. Fast Tuning Frequency Synthesizer 3.6 – 4.6 GHz 100 MHz Reference Desired Output Frequency D2 Digital Input Command D1 D0 Functional Description

  9. Detailed Description

  10. Input Module

  11. Resolution Modules

  12. Basis Frequency Modules

  13. Switch Selection Module

  14. Output Module

  15. Preliminary Laboratory Work • Design and Simulation of Ideal Chebyshev Filters • Currently Adding Parasitic Effects • Real Component Values • Real Inductor Responses • Microstrip Transmission Effects • Via Connections

  16. Preliminary Laboratory Work • Filter Design • Insertion Loss Method

  17. Preliminary Laboratory Work • Filter Design

  18. Preliminary Laboratory Work

  19. Preliminary Laboratory Work Ideal S11 = Dark Blue Ideal S21 = Aqua Blue Actual S11 = Red Actual S21 = Purple

  20. Preliminary Laboratory Work

  21. Preliminary Laboratory Work

  22. Preliminary Bill of Materials

  23. Preliminary Bill of Materials

  24. Preliminary Spring Semester Schedule

  25. Preliminary Spring Semester Schedule

  26. Fast Tuning Synthesizer • Any questions?

More Related