Current PhD Students
William Pavlick (Ph.D., 2023-present) [Google Scholar]
Will received his B.S. in Electrical Engineering and B.S. in Chemistry from Purdue University in the Spring of 2023. At Purdue, Will performed research under Dr. Thompson, Dr. Webb, and Dr. McKinney where his efforts included synthesizing novel magnetocaloric metal alloys, developing optomechanic time domain simulations for modeling thin membrane displacement, and verifying an algorithmic approach to optical Fourier transformers respectively. He joined the mmWave Antennas and Arrays Laboratory at the Georgia Institute of Technology in the Fall of 2023 with a Presidential Fellowship. Additionally, he was awarded the National Science and Engineering Graduate (NDSEG) Fellowship in 2024. Will’s current research focuses on using magnetic structures in conjunction with printed circuit board technology to develop novel, mechanically reconfiguring metamaterials. This effort is in collaboration with Dr. Renee Zhao’s mechanical engineering group at Stanford University. (e-mail: wpavlick3@gatech.edu)
Yuheng He (Ph.D., 2023-present) [Google Scholar]
Yuheng received his B.S. in Communication Engineering in 2021 from Wuhan University of Technology, the B.S. in Electrical Engineering in 2021 from University of Birmingham, and the M.S. of Applied E&M and RF Circuit from University of Michigan. From Jan 2020 to Feb 2021, He worked with Prof. Zheng Huang in the topic of indoor Bluetooth navigating system, focuses on the angle of departure (AoD) algorithm. At Birmingham, his undergraduate thesis concentrates on building a wirelessly controlled firefighting robot with real-time video transmission. He joined mmWave Antennas and Arrays Laboratory as a PhD student in fall 2023. His current research focuses on the design of chipless fully passive bio implantable sensors and the range radar cross section (RCS) measurement technique through lossy medium. His research interests also include in metasurface and reflectarray design. (e-mail: yhe491@gatech.edu).
Chinaza A Ogbonna (Ph.D., 2021-present) [Google Scholar]
Chinaza Ogbonna is a trailblazing Ph.D. candidate in Mechanical Engineering at Georgia Tech. Her cutting-edge research focuses on developing biodegradable implantable multi-analyte sensors for post-operative monitoring, poised to revolutionize patient care. With expertise spanning semiconductor fabrication and characterization, chemical treatments on carbon fibers, the influence of compressive strain on magnesium alloys, and the structural dynamics of polythiophene-based conjugated polymers, Chinaza has honed her skills through diverse projects. Prior to attending the PhD program, she worked as a research engineer at the Institute of Electronics and Nanotechnology (IEN), where she spearheaded a variety of projects, including formulating COVID-19 protocols, designing and implementing equipment modifications and installation, and designing, fabricating, and characterizing microdevices as well as training users on various cleanroom tools. With her diverse skill set in lithography, etching, and advanced diagnostics, she is eager to innovate further in her current program, aiming to pioneer biodegradable, multi-analyte sensors for post-surgical monitoring. (e-mail: cogbonna3@gatech.edu).
David West (Ph.D., 2022-present) [Google Scholar]
David received his B.S. in Electrical Engineering from the University of South Carolina in Spring 2022. He then joined the mmWave Antennas and Arrays Laboratory at Georgia Institute of Technology as a PhD student in Summer 2022, supported by the President’s Fellowship. As an undergraduate, David participated in an internship at Oak Ridge National Laboratory in 2019 where he worked on a battery modeling framework. David also worked in Prof. Guoan Wang’s group at University of South Carolina on inductively coupled wireless power transfer from 2019 to 2022. At Georgia Tech, he has studied periodic structures and RF switches based on vanadium dioxide (VO2). He completed quasi-optical characterization of a VO2-based polarization converter metasurface. In 2023, he mentored an undergraduate student (Ashley Goodnight) in the design, simulation, fabrication, and measurement of laser-activated VO2 coplanar waveguide switches. David has co-authored 2 peer-reviewed journal paper and 5 papers in international conferences. He has served as a reviewer for IEEE Antennas and Wireless Propagation Letters and IEEE Transactions on Antennas and Propagation since 2022. He was awarded the National Defense Science and Engineering Graduate (NDSEG) Fellowship in 2024 (e-mail: dwest64@gatech.edu).
Seung Yoon (Sonny) Lee (Ph.D., 2022-present) [Google Scholar]
Sonny joined mmWave Antennas and Arrays Laboratory at Georgia Institute of Technology as a Ph.D. student in August 2022. He received his B.S. in computer and communication engineering from Korea University, Seoul, South Korea, in 2016, and his M.S. in electrical engineering from the Pohang University of Science and Technology (POSTECH), Pohang, South Korea, in 2018. Prior to Georgia Tech, he served four (4) years as a researcher at Samsung Research, Seoul, Korea, and SK Hynix, Icheon, Korea for four years, fulfilling his alternative military service. He has published 5 peer-reviewed journal articles, 12 international conference papers, and is the inventor of 19 patents. His research interests include mmWave on-chip antennas, phase-change material reconfigurable RF devices, and robotic antenna measurement techniques. He is the recipient of the 2023 IEEE AP-S Doctoral Research Grant, the 2023 IEEE AP-S Ph.D. Student Travel Grant, the 2023 CREATION Award from Georgia Tech, the 2018 Outstanding Master’s Thesis Award (Top rank in EE) from POSTECH, and the 1st Prize Best Paper Student Award from the IEEE International Symposium on Antennas and Propagation in Busan, Korea, 2018. He has served as a reviewer for IEEE TAP, AWPL, and TCPMT. (e-mail: seungyoon.lee@gatech.edu).
Sree Adinarayana Dasari (Ph.D., 2022-present) [Google Scholar]
Adi received his B.S. degree in Electrical Engineering and Economics from The Pennsylvania State University in May 2022. His honors thesis focused on designing and implementing a low-power radar to study the electron density profile of the ionosphere. At Penn State, he worked at The Applied Signal Processing and Instrumentation Lab, designing antennas for a harmonic transponder for insect tracking. He was an intern at The TU Freiberg. At Freiberg, he developed an experiment to study the effects of microwaves on burning velocity, UV-VIS-spectra, and exhaust gas composition of premixed propane flames. At Georgia Tech, he worked on he worked on design, fabrication, and measurement of high efficiency on-chip silicon carbide based dielectric resonator antennas for harsh environment application. He is currently working on characterizing the dielectric properties of vanadium dioxide (VO2). He served as a reviewer in IEEE Transactions on Antennas and Propagation since 2022. In Fall 2022, he was awarded a fellowship from Qualcomm. (e-mail: sdasari44@gatech.edu).
Walter Disharoon (Ph.D., 2021-present) [Google Scholar]
Walter received his B.S. in Electrical Engineering from Kennesaw State University in May 2021. In Undergrad, he did a Co-Op at Georgia Tech Research Institute with a focus in RF engineering, digital arrays, FPGA development, and automated RF measurements with work resulting in two conference publications. He is currently pursuing a Ph.D. at Georgia Institute of Technology. In Fall of 2021, he received the ECE Freshmen Fellowship. In Spring of 2022, he joined the mmWave Antennas and Arrays Laboratory. His work focuses on a low-loss mmWave reconfigurable reflectarray for beamforming applications; and an energy selective surface for protecting critical infrastructure. In Fall 2022, he was awarded a fellowship from Qualcomm. In Spring of 2023, he was awarded the GTRI Graduate Student Fellowship. He received his M.S. in Electrical and Computer engineering from Georgia Institute of Technology in Spring 2023. He has served as a reviewer for the IEEE Transactions on Antennas and Propagation and the Antennas and Wireless Propagation Letters since 2022. He has coauthored 2 peer-reviewed journal articles and 7 conference publications(email: wdisharoon3@gatech.edu).
Thomas G. Williamson (Ph.D., 2020-present) [Google Scholar]
Thomas G. Williamson received the BSEE (summa cum laude) and MSEE degrees from North Carolina State University in 2018 and 2019, respectively. He is a Ph.D. candidate at the Georgia Institute of Technology, where he is a member of the mmWave Antennas and Arrays Laboratory. Mr. Williamson is also a Research Engineer at Georgia Tech Research Institute (GTRI), where he works in the Antenna Systems Division of the Sensors and Electromagnetic Applications Laboratory. At GTRI he has led several internal research and development projects and sponsored projects. His research areas include radar systems, antennas, arrays, filters, RFICs, phase change materials, power amplifiers, low noise amplifiers, other RF frontend electronics, digital arrays, and digital array radars. He is a U.S. Marine Corps veteran, and during his service (2009–2014), he completed three deployments, attained the rank of Sergeant, and held multiple small unit leadership roles. Mr. Williamson received multiple commendations for excellence and meritorious service, including the Navy Achievement Medal. He received the Dean’s Fellowship award at NC State University in 2018. He won the Department of Defense National Defense Science and Engineering Graduate Fellowship (NDSEG) in 2019, which he declined to work at GTRI. He received the GTRI Star Performer Award in 2021. (e-mail: thomas.williamson@gtri.gatech.edu).
PhD Graduates
Mark Lust (Graduated with Ph.D. in 2023) [Google Scholar] 
Mark has been with group since January 2017, when he joined as a junior undergraduate student. He graduated with his B.S. in Electrical and Computer Engineering from the Ohio State University in May 2018. He was an intern with NASA Glenn Research Center in Cleveland, OH in Summer 2018 focusing on antenna arrays for space communication. Currently, he is in his second year of the Electrical Engineering PhD program and recently passed his qualifying exam in October 2019. Mark is the recipient of the 2018-2019 University Fellowship award. Mark is also recipient of the AFRL/DAGSI Ohio Student-Faculty Research Fellowship award. His current projects include vanadium dioxide (VO2) deposition and characterization, microbolometer antenna design (collaborating with fellow group member Shangyi Chen), and other VO2 devices. Mark collaborates with the OSU Department of the Materials Science and Engineering on VO2 material characterization. He also collaborates with the Air Force Research Laboratory at Write Patterson Air Force Base (e-mail: lust.50@osu.edu).
Jordan Ramsey (Graduated with Ph.D. in 2023) [Google Scholar] 
Jordan received her B.S. in Computer Engineering at the University of Maryland-Baltimore County (UMBC), in 2016. She joined the RF Microsystems group and started her PhD at Ohio State in the ECE department in August 2017. She arrived to the university as a graduate fellow. Before starting at The Ohio State Jordan has had internships at UMBC in high performance computing, modeling of Parkinson’s patient’s motor ability and touch interaction in the operating room, Livermore national lab in technological policy and business relations, Johns Hopkins University focusing on image based calibration of motion estimation algorithms, and at Oak ridge national laboratory investigating the effects of routing procedures on total vehicle emission. In May 2019 Jordan completed her Ph.D. qualifying exam. During the course of her time in the Microsystems group she has contributed to the MEMS pulmonary artery banding device project for the treatment of congenital heart disease and is currently working on reconfigurable reflectarrays (email: ramsey.461@osu.edu).
Jack Eichenberger (Graduated with Ph.D. in in 2022) [Google Scholar]
Jack Eichenberger joined the RF Microsystem group as a PhD student in August of 2017. He was awarded the Ohio State University Fellowship during the 2017-2018 school year, as well as the AFRL Student/Faculty Fellowship during the summer of 2019 and GRA in 2018-2019. Jack’s research interests include ultrawideband antennas, antenna arrays, and metasurfaces. He designed, fabricated, and tested an ultrawideband Vivaldi antenna operating from 2.5 to 57 GHz. Projects include beam steering by mechanical actuation and a magnetically reconfigurable metasurfaces in collaboration with Prof. Renee Zhao’s lab in the Department of Mechanical Engineering, Stanford University. Jack graduated in May 2022 with PhD dissertation titled “Novel Ultra-wideband Vivaldi Antenna and Mechanically Reconfigurable Antenna Arrays”. (e-mail: eichenberger.9@osu.edu).
Kendrick Henderson (Graduated with Ph.D. in 2021) [Google Scholar]
Kendrick received his B.S. of Electrical Engineering (2015), B.S. of Computer Engineering (2015), and M.S. of Electrical Engineering (2017) from the University of South Alabama. Kendrick started his PhD in Electrical and Computer Engineering and joined Prof. Ghalichechian’s group at the Ohio State University in Fall 2017. His studies were funded by the Department of Defense SMART program. He graduated with PhD in 2020. His research projects included metal-only reflectarrays, reconfigurable reflectarrays, and shaped beam reflectarray. Ken joined US Naval Surface Warfare Center in 2021. (email: henderson.965@osu.edu)
Shangyi Chen (Graduated with Ph.D. in 2021) [Google Scholar] 
She earned her B.S. degree from Huazhong University of Science and Technology in 2014, and the M.S. degree from the University of Missouri in 2016. Shangyi Chen was a Ph.D. student at the Department of Mechanical and Aerospace Engineering and the ElectroScience Laboratory. Shangyi joined the group in January 2017 and appointed as a Graduate Research Associate. Her research focused on microbolometers using phase-change materials (PCM) for millimeter-wave (mmW) imaging. She received her Ph.D. in Mechanical Engineering at the Ohio State University in 2021. She joined University of Pennsylvania as a Post doctoral researcher in 2021. (email: chen.6642@osu.edu).
Jiantong Li (Graduated with Ph.D. in 2020) [Google Scholar]
Jiantong graduated from Tianjin University, Tianjin Shi, China in 2012 with a B.S. degree in Electronic Science and Technology and a M.S. degree in Integrated Circuit Engineering in 2015. After graduation, he had an internship in a Chinese Medical Center for six months. Jiantong started his PhD in Electrical and Computer Engineering in Fall 2015 and joined the RF Microsystems group in February 2017. He advanced to candidacy in November 2018. His research is centered on novel antenna arrays. His past project includes design and simulation of ultra wideband tightly coupled dipole arrays. His current projects include (a) design, fabrication and measurement of millimeter wave array at 60 GHz using MEMS fabrication processes; (b) design, fabrication (on PCB) and measurement of millimeter wave array at 60 GHz, and (c) non-contact on-chip millimeter wave antenna measurements. Jiantong was a Graduate Research Associate at ESL. He gradudated with Ph.D. in December 2020 and joined Samsung Research America (email: li.6010@osu.edu).
Behnam Ghassemiparvin (Graduated with Ph.D. in 2020) [Google Scholar] 
Behnam received the B.S. degree from University of Tabriz, Tabriz Iran in 2010 and the M.S. degree from Bilkent University in 2012. During his M.S. studies his research was focused on dyadic Green’s function solution for scattering from wedge structures. He has started his Ph.D. in Electrical and Computer Engineering at The Ohio State University in 2014 and joined the RF Microsystem’s group at the ElectroScience Lab in January 2015. During his Ph.D. he has worked on the design, fabrication and testing of millimeter wave reconfigurable antennas and microsystems based on paraffin phase change materials. He has also worked on the complex permittivity characterization of materials using time-domain spectroscopy. He graduated in January 2020 and joined Apple Inc. as antenna engineer.
Ersin Yetisir (Graduated with Ph.D. in 2015) [Google Scholar]
Ersin received the B.Sc. degree in electrical and electronics engineering from Bilkent University, Ankara, Turkey, in 2010, and the Ph.D. degree from The Ohio State University, Columbus, OH, USA, in 2015. His dissertation was advised by Prof. John Volakis and co-advised by Prof. Nima Ghalichechian. From 2010 to 2015, he was a Graduate Research Assistant with the ElectroScience Laboratory (ESL), The Ohio State University. He was a post-Doctoral Researcher in 2016 in Prof. Ghalichechian’s group. At Ohio State he worked on wideband and low-profile antenna array and feed-network design for microwave and millimeter-wave frequencies and wideband/multiband antennas with high isolation for MIMO and simultaneous transmit and receive applications. Since 2016, he has been with SpaceX, Redmond, WA, USA, where he has been helping in the design and characterization of low-cost phased array apertures and front-end components and developing calibration methods for satellite and ground terminals. Dr. Yetisir was a recipient of the Best Student Paper Awards at the 2016 USNC/URSI National Radio Science Meeting (second place) and the 2016 International Workshop on Antenna Technologies (coauthor).
Past MS Students
Carmen Matos (M.Sc. with thesis, Graduated in 2020) 
Carmen received her B.S. in Electrical Engineering from the University of Puerto Rico at Mayaguez in 2018. During her studies, she had several internships at Boeing, SpaceX, and Mitre Corp working on projects focused in different areas of applied electromagnetics. She joined the Ohio State University in 2018 as a University Fellow. Her research focused on robotically controlled millimeter wave antenna measurement systems. Carmen is the recipient of the 2018 AMTA travel scholarship. She graduated with Master’s degree (with thesis) on May 2020 and joined L3-Harris. (email: matos.39@osu.edu).
Kunchen Zhao (M.Sc. with thesis, Graduated in 2019) 
Kunchen Zhao joined the group in 2017 and graduated with M.Sc. degree from Ohio State University in 2019. His thesis is titled “3D Printed Frequency Scanning Slotted Waveguide Array with Wide Band Power Divider”. He joined University of Boulder, CO, to pursue his PhD degree.
Alejandro Johnson-Eusebio (M.Sc. with thesis, Graduated in 2018)
Alejandro Johnson-Eusebio joined the group in 2016 and graduated with M.Sc. degree from Ohio State University in 2018. His thesis is titled “60 GHz 4-Bit Phase Shifter Design with VO2 Switches”. He joined Northrop Grumman Electronics Systems after graduation.
Kyoung Ho (Albert) Jeong (M.Sc. with thesis, Graduated in 2017)
Albert Jeong received his M.Sc. degree from the Ohio State University in 2017. His thesis was titled “Fabrication and Measurement of Millimeter Fresnel Lens and Helical Antenna using Additive Manufacturing”. He joined Samsung Electronics- Korea after graduation.
Past Undergraduate Students
Ashley A Goodnight (Undergraduate Researcher, 2023)
Ashley is an undergraduate student pursuing a bachelor’s degree in electrical engineering at Georgia Institute of Technology. She has interned at TTM Technologies working on the design, simulation and testing of RF components including couplers and power dividers. Through the Opportunity Research Scholars (ORS) program, she has also done research fabricating RFID tags at the ATHENA Laboratory as well as estimating the water content of leaves using Ka-Band radiation in the Electromagnetic Measurements in Communications and Computing Laboratory. In the mmWave Antennas and Arrays Laboratory, her research is centered around thermal excitation of phase change material vanadium dioxide using vertical-cavity surface-emitting lasers. She was awarded the 2023 Electrical Engineering Junior Scholar Award from Georgia Tech Institute of Technology. (email: agoodnight3@gatech.edu).
Mihir Kasmalkar (Undergraduate Researcher, 2022)
Mihir is an undergraduate student studying Electrical Engineering with a minor in Computing and Systems & Architecture at Georgia Tech. He has done internships at Relativity Space Systems and NASA Ames doing mixed-signal and low-voltage power electronics, and he has done RF design with the Space Systems Design Laboratory at Georgia Tech. He is also the electrical hardware lead in the Yellow Jacket Space Program liquid-rocketry team, where he designed a custom DAQ and made the link budget for the flight vehicle. He conducts research at the mmWave Antennas and Arrays Laboratory on 60 GHz transceivers (email: mkasmalkar@gatech.edu).
Annie Roo (Undergraduate Researcher, 2020)
Annie is an undergraduate student pursuing bachelor’s degree in electrical engineering and industrial design at The Ohio State University. She has had internships at General Electric Appliances working on circuit board design, testing and troubleshooting, and at Caterpillar Inc. working on neural network development (email: roo.5@osu.edu).
- Gus Workman (email: workman.1244@osu.edu), Samsung Research America
- Jennifer Humanchuck (email: humanchuk.1@osu.edu); MS student at University of Michigan
- Grant Senger (BSc 2019), Eschweiler & Potashnik, LLC
- Spandan Shah (BS ’18), Capital One
- Scott Lunardini (BSc ’16), General Electric Aviation
- Benjamin Lough (MSc ’16), Texas Instruments