3-Stage Low Noise Amplifier Design at 12Ghz 이 준 희 1 4 조 Kwangwoon University
Agenda Design Procedure Considerations for Low Noise Amplifier Specification for Low Noise Amplifier 1-Stage LNA (FET_ATF-36077) - Characteristics of FET - Operating point - Bias Feed Line - DC Block Line - Gain, Noise, Stability Circle - 1-Stage LNA (Schematic and Simulation) 3-Stage LNA - 3-Stage LNA (Schematic and Simulation) - HB1 Tone Test - HB2 Tone Test - Layout for 3-Stage LNA Conclusion and Future Work
Decision for Active Device Design Procedure Time Table for Designing 9.20 9.21 10.2 10.3 10.6 10.7 10.14 10.15 10.20 10.21 11.5 11.6 11.20 11.21 ~11.28 Decision for Active Device Studying Basic Theory Design DC Bias Circuit Input Matching Output Matching EM Simulation Connect 3 LNAs And Matching Documentation Presentation
Considerations for LNA The most important consideration for LNA - Noise Figure - Stability (Conditionally and Unconditionally) - Gain LNA is to reduce noise significantly and enhance signal power Figure. 1 Low Noise Block
Specification for 3-Stage LNA Parameter Required Specification Frequency (GHz) 12 Ghz Band Width (MHz) 400 Noise Figure (dB) < 1.2 Gain (dB) ≥ 33 Input Return Loss (dB) < -10 Output Return Loss (dB) < -15 Gain Flatness (dB) ± 0.5 Stability Unconditionally stable
Design 1-Stage LNA (1) Characteristics for FET (ATF-36077)
Design 1-Stage LNA (2) Characteristics for FET (ATF-36077)
Design 1-Stage LNA (3) Bias Feed Line
Design 1-Stage LNA (4) DC Block Line
Design 1-Stage LNA (5) Gain Circle, Noise Circle and Stability Circle
Design 1-Stage LNA (6) 1-Stage Low Noise Amplifier at 12GHz
Design 1-Stage LNA (7) Simulation for 1-Stage LNA
Design 3-Stage LNA (1) Schematic and Simulation for 3-Stage LNA
Design 3-Stage LNA (2) HB 1-Tone Test for 3-Stage LNA
Design 1-Stage LNA (5) HB 2-Tone Test for 3-Stage LNA
Design 3-Stage LNA (4) Layout of 3-Stage LNA 67.5mm
Conclusion and Future Work - Obtain unconditionally stable - Noise Figure = 0.89 < 1dB - S11 = -13dB, S22 = -28dB - 2dB gain reduction for each LNA (Total =25.5dB) Future Work - Fabricate 3-Stage Low Noise Amplifier - Artwork to reduce size (Up to 60mm) - Gain Improvement (Up to 27dB)