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Fast Tuning Frequency Synthesizer Design and Development

This report outlines the development of a fast tuning frequency synthesizer, capable of producing output frequencies ranging from 3.4 GHz to 4.6 GHz with a step size of 50 MHz. Utilizing both direct and indirect synthesis methods, as well as phase-locked loops, the synthesizer aims to achieve an output power of 0 dBm with minimal spurious emissions. Key considerations include tuning times of less than 500 ns, and the integration of an external 100 MHz reference signal. Preliminary laboratory work has focused on ideal filter designs and addressing real-world component effects.

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Fast Tuning Frequency Synthesizer Design and Development

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  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?

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