1. RF Power Amplifier Design and Testing By: Jonathan Lipski and Brandon Larison Advisor: Dr. Shastry

2. Table of Applications

3. What is WiMax? Worldwide Interoperability for Microwave Access Worldwide Interoperability for Microwave Access Primary purpose is to provide mobile broadband connectivity Primary purpose is to provide mobile broadband connectivity Much greater range than WiFi -(Wi-Fi on steroids) Much greater range than WiFi -(Wi-Fi on steroids)

4. First Approach Design Power Amplifier from scratch -Driver and Power Design Power Amplifier from scratch -Driver and Power Researched several possible applications for the amplifier Researched several possible applications for the amplifier Began looking for a suitable transistor for fabrication Began looking for a suitable transistor for fabrication

5. Problems Needed model for appropriate transistor, could not find any Needed model for appropriate transistor, could not find any Needed to rethink our design, not enough time to complete this design Needed to rethink our design, not enough time to complete this design Chose new design Chose new design

6. Power Amplifier Module

7. Connector Version

8. Integrated Version

9. Design Overview 2 Power Amplifiers and 2 Driver Amplifiers will be purchased -Eval Boards 2 Power Amplifiers and 2 Driver Amplifiers will be purchased -Eval Boards Additional circuitry will be designed in the lab Additional circuitry will be designed in the lab Fabrication will either be done in lab or outsourced Fabrication will either be done in lab or outsourced

10. Driver Amplifier Receives a small amount of input power, and amplifies Receives a small amount of input power, and amplifies

11. Power Amplifier Receives the output power of the Driver Amplifier, and further amplifies Receives the output power of the Driver Amplifier, and further amplifies Amplifies the power to increase the range of a signal sent through the air Amplifies the power to increase the range of a signal sent through the air

12. Option 1: Wilkinson Power Divider

13. Option 2: Branch Line Coupler

14. Testing Procedure Instrumentation cannot handle the power levels we’ll be using Instrumentation cannot handle the power levels we’ll be using Sampling Sampling S-Parameters, Linearity, Efficiency S-Parameters, Linearity, Efficiency

15. Tasks Remainder of this semester -Order Amplifiers -Determine Architecture -Finalize Plans for next semester Remainder of this semester -Order Amplifiers -Determine Architecture -Finalize Plans for next semester

16. Tasks Next Semester -Simulation with Eval Boards -Determine Fabrication Method -Fabricate -Test Connector Version -Fabricate Integrated Version -Test -Present Results Next Semester -Simulation with Eval Boards -Determine Fabrication Method -Fabricate -Test Connector Version -Fabricate Integrated Version -Test -Present Results

17. If time permits… Look into Heat Dissipation Look into Heat Dissipation

18. Tentative Work Schedule Week 1: Receive Ordered Parts Week 1: Receive Ordered Parts Week 2: Simulation Week 2: Simulation Week 3: Simulation Week 3: Simulation Week 4: Fabrication Week 4: Fabrication Week 5: Fabrication Week 5: Fabrication Week 6: Fabrication Week 6: Fabrication Week 7: Testing Week 7: Testing Week 8: Testing Week 8: Testing Week 9: Spring Break Week 9: Spring Break Week 10: Analysis of Results Week 10: Analysis of Results Week 11: Presentation Preparation Week 11: Presentation Preparation Week 12: Presentation Preparation Week 12: Presentation Preparation Week 13: Presentation Week 13: Presentation Week 14: Play Week 14: Play Week 15: Play Week 15: Play Week 16: Graduate Week 16: Graduate

19. References Gonzalez, Guillermo. "4.7-4.8." Microwave Transistor Amplifiers: Analysis and Design. Upper Saddle River, NJ: Prentice Hall, 1997. 352-74. Print. Gonzalez, Guillermo. "4.7-4.8." Microwave Transistor Amplifiers: Analysis and Design. Upper Saddle River, NJ: Prentice Hall, 1997. 352-74. Print. Grebennikov, Andrei. "Power Amplifier Design Fundamentals: More Notes from the Pages of History." High Frequency Electronics May 2010: 18-30. Grebennikov, Andrei. "Power Amplifier Design Fundamentals: More Notes from the Pages of History." High Frequency Electronics May 2010: 18-30. "High Power RF Amplifier." RF Power Amplifier | Powerful Amplification. Web. 25 Sept. 2011.. "High Power RF Amplifier." RF Power Amplifier | Powerful Amplification. Web. 25 Sept. 2011.. "RF Power Amplifier." Wikipedia, the Free Encyclopedia. Web. 25 Sept. 2011.. "RF Power Amplifier." Wikipedia, the Free Encyclopedia. Web. 25 Sept. 2011..

20. Questions? We may or may not have reasonable answers! We may or may not have reasonable answers!