ActiveDevices

ActiveDevices - MMIC Design and Technology Active Devices...

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Lecture 5 Active Devices MMIC Design and Technology Active Devices
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Lecture 5 Active Devices Update Overview of FET devices Text pages 59 – 76 Start of amplifier design Impedance matching and stability Text pages 183 – 210 Text pages 210 -243 Smith chart software http://www.sss-mag.com/toptensw.html http://www.sss-mag.com/zip/smith_v191.zip
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Lecture 5 Active Devices MESFET Operation ( 29 s V E E v wv a h qN I ds d ds = = - = μ ( 29 2 1 0 2 - = d gs bi r qN V V a ε Const V gs ds m ds V I g = =
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Lecture 5 Active Devices MESFET Equivalent Circuit Const V gs ds m ds V I g = =
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Lecture 5 Active Devices Frequency ( 29 ( 29 ( 29 + + + + + = = + = d s gd m ds d s gd gs m T g eff T gd gs m T R R C g R R R C C g f L v f C C g f 1 2 2 2 π Cut off Frequency where I ds =I gs For High frequency Increase effective velocity and reduce gate lengths And minimize resistance
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Lecture 5 Active Devices HEMT and pHEMT
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Lecture 5 Active Devices Data file for actual device
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Lecture 5 Active Devices S11 on Smith Chart 6GHz 14GHz
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Lecture 5 Active Devices S21 and S12 -4 -3 -2 -1 0 1 2 3 4 -4 -3 -2 -1 0 1 2 3 4 S21 S12 / .06 2GHz 18GHz Re Im
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Lecture 5 Active Devices FET Example
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This note was uploaded on 04/09/2010 for the course EE 599 taught by Professor Povinelli during the Spring '08 term at USC.

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ActiveDevices - MMIC Design and Technology Active Devices...

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