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ELEC 412 RF & Microwave Engineering

ELEC 412 RF & Microwave Engineering. Fall 2004 Lecture 9. Low Freq Common-Emitter BJT Model. Model is the hybrid-  BJT model where r BE = r  , r BC = r  , and r CE = r o. ABCD Parameters of Some Circuits. Conversion Between Network Reps. Microwave Amplifier Subnetworks.

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ELEC 412 RF & Microwave Engineering

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  1. ELEC 412 RF & Microwave Engineering Fall 2004 Lecture 9

  2. Low Freq Common-Emitter BJT Model • Model is the hybrid- BJT model where rBE = r , rBC = r , and rCE = ro

  3. ABCD Parameters of Some Circuits

  4. Conversion Between Network Reps

  5. Microwave Amplifier Subnetworks • Amplifier is separated into subnetworks • Add all subnetworks together for complete amplifier design

  6. High Frequency BJT Model • Model is high-frequency hybrid- model • rBE=r, rCE=ro,CBE=C, CBC=C

  7. S-Parameter Computation for T-Network T-Network S11 & S21 Circuit S12 & S22 Circuit

  8. Signal Flow Diagrams

  9. Signal Flow: Terminated Transmission Line

  10. Signal Flow: Building Blocks

  11. Signal Flow: Terminated Two Port

  12. Signal Flow: Simplification

  13. Signal Flow: Simplification – Con’t 1

  14. Signal Flow: Simplification – Resultant

  15. Signal Flow: Terminated Transmission Line

  16. Measuring S11 & S21

  17. S-Parameter Measurement Signal Flow

  18. TRL Calibration Method

  19. TRL Calibration Method – Con’t

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