Our Group
Cody Scarborough, PhD
Professor at CU Boulder
Professor Scarborough was born and raised in a suburb of Houston, Texas. He completed his B.S. in Electrical and Computer Engineering at the University of Texas at Austin in 2017. It was there that he met his lovely wife Amber as a freshman in college. From Texas, he moved to Michigan where he completed his Ph.D. degree in Electrical Engineering and Computer Science at the University of Michigan under the advisement of Professor Anthony Grbic. Professor Scarborough is now an assistant professor at the University of Colorado at Boulder and runs the EMRG. Outside of research, Professor Scarborough enjoys playing music, hiking on the beautiful Boulder Flatirons, tending to his two cats, and skiing.
Arunima Singh
Ph.D. Student
Arunima Singh completed her master’s degree in the nanotechnology field from Indian Institute of Technology (IIT), Roorkee, India. Within this program, she focused her studies on nano-electronic materials for tomorrow’s semiconductor and energy applications. Her interests lie in the development of nanocomposites for MRI applications and radar wave absorption, the study and characterization of nanomaterials, Radar Cross Section (RCS) reduction, Frequency Selective Surfaces (FSS) and Fractal Frequency Selective Surfaces.
As part of the M Tech. program, she has completed various courses in the fabrication and characterization (e.g. XRD and FESEM) of nano-scale materials. She has gained the knowledge of nanoparticle synthesis using several methods like Chemical Vapor Deposition, auto combustion and laser deposition. She has preliminary knowledge within areas like the investigation and characterization of surfaces, electrical characterization of functional layers, and fabrication techniques like laser vapor deposition and thin film techniques. In her M Tech research work she developed metasurface-based Frequency Selective Surfaces (FSS) and Fractal FSS structures for selective transmission of EM waves impinging on microwave absorbing materials for reduction of RCS.
Joel Johnson
Ph.D. Student
Joel Johnson received his B.S. and M.S. in Electrical Engineering from the University of Texas at Dallas in 2021 and 2022 respectively. He interned at UT Dallas in Dr. Kenneth O's Lab and worked on characterizing novel low phase noise circuits. He also interned at Qorvo under High Performance Analog group working on modeling RF components, PA/DPD simulations, and a MMIC GaN PA design. Enticed by MMIC design, he decided to join the RF group at CU Boulder in Spring 2023 to pursue his PhD under the advisement of Dr. Scarborough and Dr. Popovic to further learn about novel designs in MMICs.
In his free time, he enjoys reading for fun and passionately follows motor racing.
Allie Montgomery
Ph.D. Student
Allie Montgomery received her B.S. in Electrical Engineering from the University of Iowa in 2023. While there, she worked in the Quantum Light Control group under the direction of Dr. Ravitej Uppu. Her projects focused on the generation of pairs of entangled Near-IR photons using non-linear optical processes. After graduating, she came to the University of Colorado to pursue a Ph.D. under the advising of Drs. Scarborough and Popovic.
Her current research focuses on antenna arrays used to convert wireless RF power to DC power. She is also interested in antenna and MMIC design. In her free time, Allie enjoys fencing, reading, playing cello and bass, and making objectively pretty bad coffee.
Samuel Silberman
Ph.D. Student
Samuel Silberman is a PhD student originally from Burlington, Vermont. He went to Canada for his undergraduate studies, where he received his B.S. in electrical engineering in 2025 at the University of New Brunswick in Fredericton, NB. While there, he worked in the Radiating System Research Lab on projects related to resonant capacitive power transfer for electrified roadways. He also worked on analytically modelling RF exposure in the human body from various sources.
In his free time, Sam enjoys cheering on his favorite sports teams such as the Patriots and Red Sox. He also plays many sports casually, including tennis, basketball, soccer, golf, football, softball and baseball. In addition, Sam enjoys skiing, rock climbing, hiking, reading, and playing chess and poker.
Cody Oberbeck
Ph.D. Student
Cody Oberbeck earned his B.S. in Electrical Engineering from Boise State University in 2025. While at Boise State, he worked in the Plasma and Vacuum Electron Devices (PaVED) Lab on projects involving crossed-field amplifiers and cold atmospheric plasmas. He also completed an internship at Northrop Grumman working on ICBM nuclear hardness and survivability, followed by two internships at Hyperlabs designing connectorized RF components. 
Outside of work, Cody splits his time between projects and the outdoors. Current efforts include developing a low-cost phase-noise analyzer with cross-correlation, building an automated microstrip-circuit designer using fragment-type structures driven by an MOEA/D algorithm, and creating a compact optical clock with reference-cell feedback. Photography is another interest—especially full-spectrum and near-infrared with modified cameras—and he is rarely without a camera. He also enjoys winemaking and exploring the Rockies.
Celestine Ananda
Visiting Scholar
Celestine Ananda is a PhD Student in CU Boulder’s Aerospace Engineering Sciences program under the supervision of Prof. Francisco Lopez Jimenez. She studies the electromagnetic properties of multiphase materials, including carbon fiber composites, aiming to increase analytical and numerical model fidelity across varying length scales. In her spare time, Celestine enjoys tent camping with her dogs and playing card/board games with friends.
Scarborough Group Alumni
Jeremiah Schwartz, M.S. – Researcher, BAE Systems
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Timothy MacDonald, M.S. – Researcher, FirstRF
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Jacob Stewart, B.S. – Ph.D. Student, CU Boulder
2024 RF LABOR DAY PARTY
A little outdoor RF labor day party was hosted by Dr. Sarborough to kick off the school year. There was inflatable animal relay races, jenga, corn hole, good food and even better people. Dr. Barton's students ended up the champions of the relay races!