DuisburgEssenUniversity! Faculty!of!Engineering ......DuisburgEssenUniversity!...
Transcript of DuisburgEssenUniversity! Faculty!of!Engineering ......DuisburgEssenUniversity!...
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Duisburg-‐Essen University Faculty of Engineering
Department of Electrical Engineering and Informa;on Technology
Ins;tute of Microwave and RF Technology
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300 MHz IQ-‐Demodulator for 7-‐Tesla MRI Smart Amplifier
Presendted by: Khalid Zain Elabdin
Supervised by: Prof. Dr.-‐Ing. Klaus Solbach
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IntroducLon
l Task assignment
l 7-‐Tesla MRI
l I/Q-‐demodulator
l Circuit design
l Test and results
l Conclusion
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Assignment
to design a printed circuit for the I/Q-‐demodulator using the ICs and other surface-‐mount device (SMD) components and using microstrip line on a dielectric laminate as the printed circuit technology and using SubMiniature version A SMA coaxial connectors for
signal input and output.
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7-‐Tesla MRI
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The System
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I Q Demodulator
§ HMC597LP4 Ø HIGH LINEARITY Ø Low noise figure
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AD8132
§ AD8132 DifferenLal amplifier Ø Low cost – High speed Ø Internal common-‐mode feedback
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Final SchemaLc Design
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Layout Design
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Printed Circuit Board
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Test
Measurement and Results
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Input Matching
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Measurment Setup
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Common Mode RejecLon RaLo
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Output Power RF
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RF Gain Measurment
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Output Power LO
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LO Gain measurment
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Quadrature Accuracy
∆ø=86.4°
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Baseband Bandwidth
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Conclusion
Ø An I Q Demodulator was designed for the 7 tesla Ø The layout was designed by eagle Ø The RF gain -11.3 dBm Ø The baseband bandwidth 17 MHz Ø The 1 dB compression point 12.3 dBm
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