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RF Power Amplifier Design and Testing

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RF Power Amplifier Design and Testing By: Jonathan Lipski and Brandon Larison Advisor: Dr. Shastry ... Microwave Transistor Amplifiers: Analysis and Design. – PowerPoint PPT presentation

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Title: RF Power Amplifier Design and Testing


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
  • Primary purpose is to provide mobile broadband
    connectivity
  • Much greater range than WiFi -(Wi-Fi on steroids)

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

5
Problems
  • Needed model for appropriate transistor, could
    not find any
  • Needed to rethink our design, not enough time to
    complete this 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
  • Additional circuitry will be designed in the lab
  • Fabrication will either be done in lab or
    outsourced

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

11
Power Amplifier
  • 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

12
Option 1 Wilkinson Power Divider
13
Option 2 Branch Line Coupler
14
Testing Procedure
  • Instrumentation cannot handle the power levels
    well be using
  • Sampling
  • S-Parameters, Linearity, Efficiency

15
Tasks
  • 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 -T
    est Connector Version -Fabricate Integrated
    Version -Test -Present Results

17
If time permits
  • Look into Heat Dissipation

18
Tentative Work Schedule
  • Week 1 Receive Ordered Parts
  • Week 2 Simulation
  • Week 3 Simulation
  • Week 4 Fabrication
  • Week 5 Fabrication
  • Week 6 Fabrication
  • Week 7 Testing
  • Week 8 Testing
  • Week 9 Spring Break
  • Week 10 Analysis of Results
  • Week 11 Presentation Preparation
  • Week 12 Presentation Preparation
  • Week 13 Presentation
  • Week 14 Play
  • Week 15 Play
  • 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.
  • 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.
    lthttp//www.rfpoweramplifier.org/high_power_rf_amp
    lifier.htmlgt.
  • "RF Power Amplifier." Wikipedia, the Free
    Encyclopedia. Web. 25 Sept. 2011.
    lthttp//en.wikipedia.org/wiki/RF_power_amplifiergt.

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