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ECE 405 Project 1 Handout Fall 2012 Date Handed Out: 10/29/2012 Report Due Date: 11/13/2012 This project is the first of this semester. For this...

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ECE 405 Project 1 Handout Fall 2012 Date Handed Out: 10/29/2012 Report Due Date: 11/13/2012 This project is the first of this semester. For this project, you are required to design a microstrip impedance matching circuit for a zero bias Schottky detector diode. The impedance matching circuit will have to match the impedance of the diode to a 50 Ohm transmission line. *The equivalent circuit for the zero bias diode is: Design your matching circuit first using paper calculations. Validate your paper design using Sonnet. After the validation using simulation gives the predicted results, email the ECE shop the dxf file for your design and wait for the circuit to get fabricated. Once the circuit is fabricated, solder your diode on the microstrip board. In order to test your final fabricated impedance matching circuit, measure its S11 using the VNA. Save your results. Is the result what you expect? (S11 magnitude less than -10 dB at the design frequency) *Project Requirements Design frequency: 1.575GHz (BW: > 15 MHz) Do not use any short stub matching circuits as we do not want to dc short the diode. (This is needed for project 2) Do not use any dimension less than 0.5mm in the design. (due to fabrication capabilities)
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*Project Grading Factors (ordered by importance) Completion of work Is the S11 at the design frequency less than -10dB? If not how close is it to -10dB? Hint: Try to design a relatively wideband matching circuit. This will give you some leverage to work with. How low is the magnitude of S11 at the design frequency? How compact (small) is your design? *Report: Document your calculation design process followed by the simulation validation and the experimental evaluation. Comment on any discrepancies.
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