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TRANSCRIPT
Duisburg-‐Essen University Faculty of Engineering
Department of Electrical Engineering and Informa;on Technology
Ins;tute of Microwave and RF Technology
300 MHz IQ-‐Demodulator for 7-‐Tesla MRI Smart Amplifier
Presendted by: Khalid Zain Elabdin
Supervised by: Prof. Dr.-‐Ing. Klaus Solbach
1
IntroducLon
l Task assignment
l 7-‐Tesla MRI
l I/Q-‐demodulator
l Circuit design
l Test and results
l Conclusion
2
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.
3
7-‐Tesla MRI
4
The System
5
I Q Demodulator
§ HMC597LP4 Ø HIGH LINEARITY Ø Low noise figure
6
AD8132
§ AD8132 DifferenLal amplifier Ø Low cost – High speed Ø Internal common-‐mode feedback
7
Final SchemaLc Design
8
Layout Design
9
Printed Circuit Board
10
Test
Measurement and Results
11
Input Matching
12
Measurment Setup
13
Common Mode RejecLon RaLo
14
Output Power RF
15
RF Gain Measurment
16
Output Power LO
17
LO Gain measurment
18
Quadrature Accuracy
∆ø=86.4°
19
Baseband Bandwidth
20
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
21