Electrical Engineering Ph D

Farzaneh Ahmadi

515-***-**** *******@*******.***

https://www.linkedin.com/in/farzaneh-ahmadi-93b10945/ https://scholar.google.com/citations?user=q-97xSgAAAAJ Education

Ph.D. in Electrical and Computer Engineering (ECpE) Expected Dec 2024 Iowa State University (ISU) GPA: 4.00/4.00

Focus Area: Electromagnetics, Nondestructive evaluation, Microwave Advisor: Dr. Reza Zoughi

M.S. in Electrical and Computer Engineering Graduated Jan. 2012 Tarbiat Modares University (TMU) GPA: 3.91/4.00

Focus Area: Reflectarray Antenna Design

Advisor: Dr. Keyvan Forooraghi ; Co-Advisor: Dr. Zahra Atlasbaf B.S. in Electrical and Computer Engineering Graduated Jul. 2009 Shahid Rajaii Teacher Training University (SRTTU) GPA: 3.84/4.00 Focus Area: Medical Image Fusion

Advisor: Dr. Mohammad Shams-e-Esfandabadi

Experience

Full-time Summer Engineering Intern-Electronic Design (Antenna Team), Rivian Automotive, LLC Palo Alto, CA, USA, May. 2024-Present

As an intern at the antenna engineering team, I have been actively involved in the design and testing of RF and antenna components for vehicle systems. My responsibilities include optimizing the performance of these designs to meet specific vehicle requirements using full-wave simulation software. I also work closely with instrumentation for measurements, address practical issues that arise during the project, and visualize and present results to other departments. Additionally, I collaborate with rework teams and contribute to team projects, enhancing both my technical and teamwork skills. Graduate Research Assistant, CNDE (cnde.iastate.edu) Ames, IA, USA, Aug. 2021-Present

• High-Resolution Millimeter-Wave Probes for AM Filaments Evaluation Investigated three near-field millimeter-wave probes for detecting small voids in additive manufacturing filaments, optimizing structures in CST studio suite®, and conducting V-band

(50-75 GHz) frequency range measurements.

• Efficacy of Millimeter Wave Probes for Moisture Detection in PLA Filaments Explored and compared three millimeter-wave probes for detecting absorbed moisture in PLA filaments, conducting simulations in CST studio suite® at Ka-band (26.5-40 GHz) frequency range and validating results through measurements.

• Enhancing Moisture Detection Sensitivity in PLA Filaments Developed a slitted-extended dielectric-loaded waveguide probe for improving moisture detection sensitivity in PLA filaments, conducting simulations and experiments within the Ka- band (26.5-40 GHz) frequency range.

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• EM Model for Monitoring Spatter Properties in LPBF Investigated the use of an EM model to monitor spattering properties in laser powder bed fusion

(LPBF) processes.

• RCS Measurement of Metal Powder Cloud

Currently working on measuring the radar cross-section (RCS) of a cloud of metal powder in an enclosure and comparing results with the theoretical model.

• Electromagnetic Field Analysis of VMD over a Lossy Half Space Initiated from scratch, this project delved into analyzing EM waves generated and scattered by a vertical electric dipole over a lossy medium. The Sommerfeld Integral form of the EM wave was derived and numerically calculated, while also exploring induced current changes and comparison with a small loop model.

• Method of Moments for 2D Electric Field Integral Equation Implemented MoM to solve the 2D electric field integral equation for TM polarization in the scattering from a cylinder.

• Finite Element Method for Rectangular Waveguide Eigenvalue Problem Employed FEM to solve the eigenvalue problem for both TE and TM polarizations of a rectangular waveguide.

• Fourth Order Finite Difference Method for Rectangular Waveguide Eigenvalue Applied fourth-order FEM to solve the eigenvalue of the rectangular waveguide.

• Design and Testing of Microstrip Power Divider

Designed a 1-to-8 microstrip power divider in CST and ADS, including PCB drawing and module testing.

Research and Development Engineer, TMU, Microwave lab (tmu.edu) Tehran, Iran, 2012- 2021

• Antenna Design

Design of Dual Polarized Reflectarray Antenna Unit-Cell: Proposed a novel unit-cell for dual polarized reflectarray antennas, achieving diverse polarization properties and bandwidth enhancement through meticulous design and optimization. Validated the unit-cell's efficacy via extensive numerical simulations, demonstrating linear phase response and wide frequency bandwidth, with promising applications in mobile communication systems and microwave imaging techniques.

Design and Implementation of Circularly Polarized Reflectarray Antenna: Developed innovative microstrip element unit-cells capable of converting linearly polarized incident fields into circularly polarized (CP) radiated fields. Demonstrated superior performance in phase range, linearity, and radiation characteristics through comprehensive simulations and validation experiments, offering potential applications in satellite communication and CP reflectarray systems.

Bandwidth Improvement and Size Reduction of Reflectarray Antenna: Addressed challenges of narrow bandwidth and large physical size in reflectarray antennas by proposing novel unit-cell designs. Integrated dielectric resonator antennas and microstrip patch antennas to enhance bandwidth and reduce size for applications such as medical imaging systems. Achieved remarkable performance metrics, including wide frequency bandwidth and radiation efficiency, paving the way for practical implementations in compact and high-performance reflectarray systems.

Slotted Waveguide Array Antenna: Designed slotted waveguide array antennas of various lengths and for different frequency bands. Utilized macro code in CST Studio Suite® for design and validation in Ansoft HFSS.

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Log Periodic Array Antenna: Developed log periodic array antennas across different frequency bands using CST Studio Suite®.

Reflector Antenna: Designed reflector antennas including parabolic, orange peel, and cosecant squared antennas using CST Studio Suite®.

Other kind of Antennas: Designed a variety of antennas such as horn, microstrip patch, and spiral antennas for diverse applications.

• Passive Modules design

Power Divider: Designed power dividers with 1~4, and 1~8 configurations for signal distribution.

Directional Coupler: Developed directional couplers for coupling microwave signals with specified coupling ratios.

Diplexer: Designed diplexers for combining or separating signals at different frequencies. Filters: Designed low pass, bandpass, and high pass filters (Microstrip, Stripline, and Waveguide) for various frequency bands and applications. Instructor, Vocational Schools Tehran, Iran, 2010-2021 Taught various courses including:

Physics Mathematics

Visual Basic Programming Language Logical Circuits Telecommunication Circuits Electronic basic circuits Photoshop software Advanced operating systems

Aftereffect software Premiere software

Microsoft office English for computer major

Skills

Software: Instruments:

CST Studio Suite Vector and Scalar Network Analyzer Ansoft HFSS Spectrum Analyzer

Advanced Design System RF Source

FEKO Pulse Generator

MATLAB Power Detector

Altium Designer

Fusion360

Reviewed Journal Publications

1. F. Ahmadi, J. Song, and R. Zoughi, “Electromagnetic Scattering Properties of Metal Powder Cloud for Laser Powder Bed Fusion (LPBF) Additive Manufacturing (AM),” In preparation to be submitted to IEEE Access.

2. F. Ahmadi, and R. Zoughi, “Improved Sensitivity in Microwave Assessment of Moisture Absorption in Polymeric Filaments Used in Additive Manufacturing,” (pending) Short Paper submitted to IEEE Transactions on Instrumentation and Measurement. 3. F. Ahmadi, M. T. A. Qaseer and R. Zoughi, “Microwave Nondestructive Evaluation of Moisture Content of Polymeric Filaments Used in Additive Manufacturing,” IEEE Transactions on Instrumentation and Measurement, vol. 73, pp. 1-10, 2024, doi: 10.1109/TIM.2023.3346520. Farzaneh Ahmadi

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4. F. Ahmadi, M. T. A. Qaseer and R. Zoughi, “Millimeter-Wave Near-Field Evaluations of Polylactic Acid (PLA) Filament Used in Polymer-Based Additive Manufacturing (AM),” Research in Nondestructive Evaluation, vol. 34, no. 2, pp. 67-82,2023, doi: 10.1080/09349847.2023.2189761. 5. J. Norolahi, P. Azmi, and F. Ahmadi, “Automatic modulation classification using modulation fingerprint extraction,” in Journal of Systems Engineering and Electronics, vol. 32, no. 4, pp. 799- 810, Aug. 2021, doi: 10.23919/JSEE.2021.000069.

6. F. Ahmadi, K. Forooraghi, Z. Atlasbaf, and J. Norolahi, “Novel Element for Bandwidth Improvement of the Reflect-array Antenna,” Journal of Modeling and Simulations in Electrical and Electronics Engineering, vol. 1, no. 1, pp. 13-15, Nov 2021, doi: 10.22075/MSEEE.2018.681.1034.

7. F. Ahmadi, A. Namiranian & B. Virdee, “Design and Implementation of a Single Layer Circularly Polarized Reflectarray Antenna with Linearly Polarized Feed, Electromagnetics,” vol. 35, no. 2, pp. 93-100, 2014, doi: 10.1080/02726343.2014.987637. 8. F. Ahmadi, K. Forooraghi, Z. Atlasbaf, and B. Virdee, “Bandwidth Enhancement of Dielectric Resonator Reflectarray Antenna,” Electromagnetics, vol. 34, no. 7, pp. 513-521, 2014, doi: 10.1080/02726343.2014.936299.

9. F. Ahmadi, K. Forooraghi, Z. Atlasbaf and B. Virdee, “Dual Linear-Polarized Dielectric Resonator Reflectarray Antenna,” in IEEE Antennas and Wireless Propagation Letters, vol. 12, pp. 635-638, 2013, doi: 10.1109/LAWP.2013.2259611.

Conference Publications and Presentations

1. F. Ahmadi, J. Song and R. Zoughi, “Exploring Electromagnetic Scattering Analysis for In-Situ Monitoring of Laser Powder Bed Fusion Additive Manufacturing”, Abstract accepted for poster presentation at 32nd ASNT Research Symposium, Pittsburgh, PA, June 25-28, 2024. 2. F. Ahmadi, J. Song and R. Zoughi, “Electromagnetic Scattering of Metal Powder Spatter in Laser Powder Bed Fusion Additive Manufacturing Process,” (Reviewed) Proceedings of the IEEE Conference on Antenna Measurements and Applications (CAMA), Genoa, Italy, 2023, pp. 965-967, doi: 10.1109/CAMA57522.2023.10352851.

3. Presenting webinar on “Millimeter-Wave Near-Field Evaluations of Polylactic Acid Filament Used in Polymer-Based Additive Manufacturing”, as part of the Lawrence Livermore National Laboratory (LLNL) – Nondestructive Characterization Institute (NCI) Seminar Series, Aug. 17, 2023.

4. F. Ahmadi, M. T. Al Qaseer and R. Zoughi, “Millimeter Wave Near-Field Evaluation of Moisture Content of Polymeric Filaments Used in Additive Manufacturing,” (Reviewed) Proceedings of the IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Kuala Lumpur, Malaysia, 2023, pp. 1-6, doi: 10.1109/I2MTC53148.2023.10176001. 5. F. Ahmadi, M. T. Al Qaseer and R. Zoughi, “High-Resolution Millimeter-Wave Near-Field Evaluation of Additive Manufactured (AM) Polymeric Structures,” (Reviewed) Proceedings of the American Society for Nondestructive Testing (ASNT) Research Symposium, St. Louis, MO, June 20-23, 2022, pp. 55-58, Student Best paper Award - Runner Up (2nd Place). Farzaneh Ahmadi

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6. R. S. Malfajani, F. Ahmadi, Z. Atlasbaf and J. Norolahi, “A Novel Compact Reflectarray Antenna Unit-Cell Operating at 5 GHz,” (Reviewed) 10th International Symposium on Telecommunications

(IST), Tehran, Iran, 2020, pp. 31-35, doi: 10.1109/IST50524.2020.9345851. 7. F. Ahmadi, R. S. Malfajani, nd A. Namiranian, “Two New Circularly Polarized Reflectarray Antenna Elements with Linearly Polarized Feed,” Second International Conference on Electrical, Electronic and Network Engineering, 2020 (virtual), https://civilica.com/doc/1010607. 8. R. S. Malfajani, F. Ahmadi, Z. Atlasbaf and B. A. Arand, “A Novel Element for Broadband Reflectarray Antenna Design,” (Reviewed) 28th Iranian Conference on Electrical Engineering

(ICEE), Tabriz, Iran, 2020 (virtual), pp. 1-5, doi: 10.1109/ICEE50131.2020.9260595. 9. F. Ahmadi, J. Nooralahi, A. Noori and R. A. Jesri, “Dielectric Resonator Antenna as Reflectarray Element for Circular Polarization,” (Reviewed) International Power System Conference (PSC), Tehran, Iran, 2019, pp. 37-39, doi: 10.1109/PSC49016.2019.9081502. 10. F. Ahmadi, K. Forooraghi and Z. Atlasbaf, “Circular polarized reflectarray antenna,” (Reviewed) 20th Iranian Conference on Electrical Engineering (ICEE2012), Tehran, Iran, 2012, pp. 1135- 1139, doi: 10.1109/IranianCEE.2012.6292525.

Awards

• Research Excellence Award, ISU, Spring 2024.

• Second place student poster award, 30th ASNT Research Symposium, Jun. 2022

• R. B. Thompson Fellowship, CNDE, ISU, Fall 2021- Present

• Ranked 2nd between all MS.C classmates, TMU, 2012

• Ranked 1st between all BS.C classmates, SRTTU, 2009

• Selected student in the Storytelling competition, SRTTU, 2007

• 3-year Scholarship, SRTTU, 2006-2009

• One of the top 1.2% of the 367627 participants in the university entrance exam, Iran, 2005

• Qualified at National Organization for Development of Exceptional Talents (NODET), 1998- 2005

• Selected student in the Article Writing Competitions, 1997

• Complete the five-year elementary school in four years (Grade Skipping), 1994-1998 Volunteer and Service

• Reviewer: IEEE Transactions on Instrumentation and Measurement (2022-2024) Research in Nondestructive Evaluation (2022-2024)

IEEE Sensors Journal (2024)

• Volunteer Judge for the State Science Technology Fair of Iowa, Apr. 2024

• Volunteer Ambassador in ASNT annual conference, Huston, TA, Oct. 2023

• Event Manager Officer in Graduate Organization of ECpE department, ISU, Sep. 2023-Present

• Member of Tau-Pi-Beta honor society of engineering, Sep. 2023-Present

• Volunteer Ambassador for ISU Career fair, Sep. 2023

• Section Director in ASNT local section of Iowa, Jul. 2023-Present References: Available upon request.

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