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

2. Presentation Overview Update on Project Goals Update on Project Goals Power Amplifier Overview Power Amplifier Overview Branch-Line Coupler Branch-Line Coupler ADS Models ADS Models Simulation Results Simulation Results Tentative Schedule Tentative Schedule Questions Questions

3. Project Goals Original Original PA and DA from scratchPA and DA from scratch Use Power Splitters/Combiners for increased powerUse Power Splitters/Combiners for increased power WiMAX Application (2-3 GHz)WiMAX Application (2-3 GHz) Output Power = 1 WattOutput Power = 1 Watt

4. Project Goals Updated Updated Tuning of Commercially Available Power AmplifierTuning of Commercially Available Power Amplifier Power Splitter/Combiner designed from scratchPower Splitter/Combiner designed from scratch WiFi application (2.4-2.5 GHz)WiFi application (2.4-2.5 GHz) Output Power = 100mWOutput Power = 100mW

5. Power Amplifier Module

6. Power Splitters/Combiners Why use them? Why use them? Same gainSame gain Higher powerHigher power Branch Line vs. Wilkinson Branch Line vs. Wilkinson Extra Resistor NeededExtra Resistor Needed Return LossesReturn Losses

7. Branch Line Coupler Model

8. Branch Line Coupler Theory

9. Calculations Widths & Lengths Widths & Lengths MSTRIP.exeMSTRIP.exe Center Frequency and Characteristic ImpedanceCenter Frequency and Characteristic Impedance VT-42 Data Sheet (Micro Circuits)VT-42 Data Sheet (Micro Circuits) Height of substrate Height of substrate Dielectric Constant Dielectric Constant

10. First Iteration ADS Model: BLC

11. First Iteration ADS Results: BLC

12. Tuned ADS Model: BLC

13. Tuned ADS Model Results: BLC

14. ADS Layout: BLC

15. First Iteration ADS Model: PA Module

16. First Iteration ADS Results: PA Module

17. Design Overview Power Amplifiers have been purchased -FR-4 Eval Board Power Amplifiers have been purchased -FR-4 Eval Board Additional circuitry is given in the Data Sheet for the Amplifier Additional circuitry is given in the Data Sheet for the Amplifier Fabrication will be outsourced Fabrication will be outsourced

18. RF5622 Power Amplifier Input/Output Matching Input/Output Matching DC Bias Circuits DC Bias Circuits

19. RF5622 Power Amplifier Layout

20. Testing Procedure WiMAX WiMAX Instrumentation cannot handle the power levels we’ll be usingInstrumentation cannot handle the power levels we’ll be using WiFi WiFi Requires much less powerRequires much less power

21. Testing Procedure Network Analyzer Network Analyzer Measures Return Losses, VSWR,Measures Return Losses, VSWR,S-Parameters Spectrum Analyzer Spectrum Analyzer Measures Output PowerMeasures Output Power

22. Tasks Send BLC model out for Fabrication Send BLC model out for Fabrication Simulation with Evaluation Board Simulation with Evaluation Board Finalize ADS Model of our PA Module Finalize ADS Model of our PA Module Send Model of PA Module out for Fabrication Send Model of PA Module out for Fabrication Solder Components Solder Components Test Test Present Results Present Results

23. Tentative Work Schedule To be done before Spring Break To be done before Spring Break All models sent for FabricationAll models sent for Fabrication Testing with Evaluation BoardTesting with Evaluation Board To be done after Spring Break To be done after Spring Break Solder ComponentsSolder Components TestTest Present ResultsPresent Results

24. 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.. RFMD, comp. RF5622 Data Sheet. Greensboro, NC: RFMD, 2006. Print. RFMD, comp. RF5622 Data Sheet. Greensboro, NC: RFMD, 2006. Print.

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