Who We Are

Moitreya Adhikary joined CoSMIC lab as a postdoctoral fellow in August 2022. He received his Bachelor of Engineering and Masters of Engineering in Electronics Engineering from Indian Institute of Engineering Science and Technology Shibpur, India in 2011 and 2015, respectively. He completed his PhD in Electrical Engineering from Indian Institute of Technology Kanpur in 2022. He has worked in Maxlinear Inc. Bangalore, India from 2019-2022 as a Staff Systems Engineer.

His research interests include design of high frequency integrated circuits, passive circuits, active integrated antennas and sensors for microwave, mm-wave and THz applications.

Research topic: G-band Power Amplifiers in GaN

Nusrat Jahan joined CoSMIC Lab as a Postdoctoral Research Fellow in December 2022. She completed her B. Eng. degree in Electronic and Electronic Engineering from Chittagong University of Engineering and Technology (CUET), Chittagong Bangladesh, She received her Master and doctoral degree degree in Electrical Engineering from Kyushu University, Japan in June 2016 and 2019, respectively. She received the Monbu-Kagakusho (MEXT) Scholarship of the Japanese Government at Kyushu University during her M.Sc. and Ph.D. studies.

Her current research interests include CMOS-based millimeter-wave front-end components design, RF integrated circuits and analog circuits design.

Research topic: Cryogenic CMOS electronics for quantum computing applications

Liang Gao joined CoSMIC Lab as a Postdoctoral Research Fellow in March 2023. He received the B.Eng. degree in Electronic Information Science and Technology from Sun Yat-sen University, Guangzhou, China in June 2018 and the Ph.D. degree in Electrical Engineering from City University of Hong Kong, Hong Kong in July 2022. He received the first prize at the Microwave Theory and Techniques Student Paper Award at the 22nd IEEE (HK) AP/MTT Postgraduate Conference in Nov. 2021. In August 2022, he joined the State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong as a postdoctoral fellow.

His research interests include millimeter-wave and terahertz integrated circuit design and on-chip antenna design, focusing on the design of silicon-based terahertz sources and CMOS terahertz transmit/reflect array antennas for communication and sensing applications.

Research topic: Intelligent reflective surfaces in CMOS for >100GHz applications

Guoyi Xu joined CoSMIC Lab as a Postdoctoral Research Scientist in September 2023. He received his Bachelor of Engineering from the University of Electronic Science and Technology of China (UESTC), Chengdu, China, in 2018, and the Ph.D. degree from Cornell University, Ithaca, NY, USA, in 2023. His Ph.D. dissertation focused on developing radio-frequency systems and signal processing techniques for indoor sensing and localization. His paper was the runner-up for Best Paper Award in IEEE RFID 2023 – the 17th International Conference on RFID. In Spring 2022, he worked at MathWorks Inc. as a graduate student intern where he developed new features for HDL Verifier’s Cosimulation between HDL simulators and MATLAB/Simulink.
His research interests include joint sensing and communications, digital signal processing for massive MIMO, radio-frequency/mm-Wave systems, wireless communications, indoor wireless sensing (detection and localization), and radio-frequency identification (RFID).

Sasank Garikapati received the B.Tech. degree in electrical engineering from the Indian Institute of Technology Madras, Chennai, India, in 2019. He is currently pursuing the Ph.D. degree in Electrical Engineering. His research interests broadly lie in the domain of analog and RF integrated circuit design with applications in next-generation wireless communication systems.

Awards and Honors: 2021 Columbia EE MS Award of Excellence

Phong Nguyen obtained his B.S.E. and M.S. degrees in Electrical Engineering from Case Western Reserve University (CWRU), Cleveland, OH, USA, in 2019 and 2020, respectively. During his time at CWRU, he was granted the ISSACS fellowship for his outstanding work on creating and implementing a ground penetrating radar (GPR) system used for surveying urban infrastructure.

Phong is currently working towards his Ph.D. degree in Electrical Engineering under the guidance of Prof. Harish Krishnaswamy. His research interests include the design and optimization of RF/mm-wave, analog, and mixed-signal integrated circuits, as well as their integration into communication systems.

Sastry Garimella received the B.Tech. degree in electrical engineering from IIT Madras, Chennai, India, in 2019. He worked as an RF Analog Engineer at Qualcomm, Bengaluru, India in the year 2019-2020. He is currently pursuing the Ph.D. degree in electrical engineering at Columbia University, New York, NY, USA. He has been awarded the Byron Fellowship for the spring 2021 at Columbia University.

His research interests broadly lie in the domain of analog and RF integrated circuit design with applications in next-generation wireless communication systems.

Awards and Honors: Spring 2021 Columbia SEAS Dean’s Byron Fellowship

Hari Vemuri joined Professor Krishnaswamy’s group in 2020. Prior to this Hari worked in the industry in RF and Opto Electronic domains. Hari worked at EPIR Technologies, a startup from University of Illinois wherein he worked on Cryogenic LNAs, GaN and SiGe front ends, infrared sensor readouts and and imaging systems. Subsequently, Hari worked at Qorvo Inc developing LDOs, BGRs and switches for mobile front ends. Hari received his Masters from University of California Berkeley in 2019.

Alfred Davidson received the B.Tech. (Hons.) and M.Tech. degrees in electrical engineering from IIT Madras, Chennai, India in 2020. He is currently pursuing the Ph.D. degree in electrical engineering under the guidance of Prof. Harish Krishnaswamy.

His current research interests include the design of integrated circuits & systems for next-generation communication paradigms, and the mathematical formulation and co-optimization of the RF/mmWave, analog and digital sections of the hardware implementations of these paradigms.

Alfred was part of the S.N. Bose Scholars Program in 2019 that sponsored a research internship at Columbia University. He was also awarded the Sri. V Srinivasan Memorial Prize for the student with the best academic record in the Dual Degree (B.Tech. & M.Tech.) Class of 2020, the Prof Achim Bopp Endowment Prize for the best hardware project in Electrical Engineering and the Teaching Assistant Recognition Award (TARA) during his Dual Degree program at IIT Madras.

Awards and Honors: Columbia SEAS Presidential Fellowship, 2022 Columbia EE MS Award of Excellence

Nishant Patil is a doctoral fellow at the electrical engineering department of The Fu Foundation School of Engineering and Applied Science. He works with Professor Harish Krishnaswamy at the Columbia high-Speed and Millimeter-wave IC (CoSMIC) lab. His research interests include RF and mm-wave circuits, Full duplex systems. He did his bachelor’s and master’s at the Indian Institute of Technology Madras, India. In 2022, he was awarded the best institute hardware project for his master’s thesis on NB-IoT receiver design.
He was a part of the delegation under the Youth Exchange Program by the Government of India and represented India in Russian-Indian Youth Forum at Moscow.

Kaustubh Pabba received his B.Tech and M.Tech degrees in Electrical Engineering from IIT Kanpur, India in 2023. He joined Prof. Harish Krishnaswamy’s lab at Columbia University, New York in Fall 2023 to pursue his Ph.D degree in Electrical Engineering.

His current research interests include development of emerging technologies such as Cryogenic CMOS Circuits for Quantum Computing Applications.

In 2023, he was awarded the IEEE MTT-S Undergraduate/Pre-Graduate Scholarship, supporting his master’s thesis at IITK on the design of an impedance transforming circulator.

Hazal graduated magna cum laude with a B.S. from Duke University in Electrical and Computer Engineering and a minor in Mathematics in 2012. She then joined Cornell University as a PhD student, graduating with a Ph.D. in Electrical and Computer Engineering in May of 2018, where she worked with Dr. Alyosha Molnar. Her thesis research focused on the design and theoretical analysis of single antenna duplexing transceivers. In June 2018, she joined Dr. Harish Krishnaswamy’s research group as a postdoctoral research scientist.

Research topic: Interference Mitigation for Simultaneous-Transmit-and-Receive MRI

Tianwei received the B.S. degree from the University of Electronics Science and Technology of China (UESTC), Chengdu China, in 2010, the M.Eng degree from the Nanyang Technological University (NTU), Singapore, in 2012, and the Ph.D degree from the National University of Singapore (NUS) in 2018, all in Electrical Engineering. From 2012 to 2017, he was also with Temasek Lab NUS, as an Associate Scientist and then a Research Scientist. He shortly joined Huawei Technologies as a Senior Engineer in 2018. In November 2018, he joined Dr. Harish Krishnaswamy’s research group as a Postdoctoral Research Scientist.

Research topic: Millimeter-wave Open-Access Testbeds

Ahmed received the B.Sc. and M.Sc. degrees from Cairo University in 2011 and 2014, respectively, and the Ph.D. degree from the University of Texas at Austin in 2019, all in Electrical Engineering. In May 2019, he joined Dr. Harish Krishnaswamy’s group as a Postdoctoral Research Scientist where he is working on integrated magnetless non-reciprocity for wireless communications and quantum computers.

Research topic: Non-Reciprocal Topological Metamaterials
Awards and Honors: 2020 Forbes 30 Under 30 in Science

Kexin Li joined CoSMIC Lab as a Postdoctoral Research Scientist in September 2022. She earned her Ph.D. in Electrical and Computer Engineering from the University of Illinois Urbana-Champaign in 2022 and holds master’s degrees from Imperial College London and New York University. She received an academic achievement award from NYU’s ECE department and was selected as a 2022 EECS Rising Star. She also has research internship experience with Mitsubishi Electric Research Lab (MERL).

Kexin’s research focuses on understanding and modeling the physical behavior of emerging nanoscale electronic materials and devices, with the aim of enabling new system-level functionalities for high-power and high-frequency applications.

Research topic: Device-circuit co-design in III-V and cryogenic electronics
She is now an assistant professor at Arizona State University

Anandaroop Chakrabarti graduated from the Indian Institute of Technology, Kharagpur in 2010 with a Bachelor’s degree in Electronics & Electrical Communication Engineering. He spent the summer of 2009 at the University of Utah on a three-month internship under Dr. Richard Brown, Dean of Engineering. He joined Dr. Harish Krishnaswamy’s research group in August 2010 as a PhD-track student. He graduated with his PhD in early 2016.

In summer 2013, he was with the IBM T. J. Watson Research Center, Yorktown Heights, NY, USA, on a three-month internship. His research interests include mmWave and RF circuits and systems in silicon, massive mmWave multi-input- multi-output (MIMO) systems and related applications.

Thesis Title: Architectures and Integrated Circuits for Efficient, High-power “Digital” Transmitters for Millimeter-wave Applications
Current Position: Research Scientist, Intel Research Labs
Awards and Honors: 2015 IEEE RFIC Symposium Best Student Paper Award – 1st Place, 2014 Bell Labs Prize Finalist, 2014 Qualcomm Innovation Fellowship, 2013 IEEE Microwave Theory and Techniques Society (MTT-S) Graduate Fellowship

Jin (Joe) Zhou received the B.S. degree in Electronics Engineering from Wuhan University, Wuhan, China in 2008, and the M.S. degree in Microelectronics from Fudan University, Shanghai, China, in 2011. From July 2011 to August 2012, he was with MediaTek, Singapore, as a RFIC design engineer worked on cellular and wireless products. He joined CoSMIC lab as a PhD student in Fall 2012. He graduated with his PhD at the end of 2016.

Thesis Title: Integrated Self-Interference Cancellation for Full-Duplex and Frequency-Division Duplexing Wireless Communication Systems.
Current Position: Assistant Professor, ECE Department, University of Illinois at Urbana Champaign
Awards and Honors: Honorable Mention Award for Best Demo at the NYC Media Lab’s NYCML16, 2016 Columbia EE Jury Award, 2015-2016 IEEE SSCS Predoctoral Achievement Award, 2015 Qualcomm Innovation Fellowship

Linxiao Zhang graduated from Nanyang Technological University, Singapore, in 2011 with a Bachelor’s degree in Electrical and Electronics Engineering. He interned at the Institute of Microelectronics, Singapore, for five months in 2009. In Summer 2012, he joined Dr. Harish Krishnaswamy’s research group as a PhD-track student. He graduated with his PhD in 2017, which focused on architectures and integrated circuits for RF MIMO transceivers and systems.

Thesis Title: RF/Analog Spatial Equalization for Integrated Digital MIMO Receivers
Current Position: IC Design Engineer, Broadcom Corporation
Awards and Honors: Columbia EE 2013 MS Award of Excellence

​Jahnavi Sharma graduated with Bachelor’s and Master’s degrees in Electrical Engineering from the Indian Institute of Technology, Madras in May 2009. She graduated with a PhD in Electrical Engineering from Columbia University in 2017. In the summer of 2007, she did a three-month internship at the Microelectronics Center of the Indian Institute of Technology, Kharagpur with the late Dr. Shantiram Kal. Her PhD thesis at CoSMIC lab was focused on high power and/or high-fidelity signal generation and synthesis from RF to optical frequencies. Jahnavi received the 2015-2016 IBM PhD Fellowship and was selected as a 2016 MIT-CMU EECS Rising Star.

Thesis Title: CMOS Signal Synthesizers for Emerging RF-to-Optical Applications
Current Position: Designer at Intel Corporation
Awards and Honors: 2015-2016 IBM PhD Fellowship, 2016 MIT-CMU EECS Rising Star

​Ritesh A. Bhat graduated from the National Institute of Technology, Karnataka in 2010 with a Bachelor’s degree in Electrical and Electronics Engineering. He interned at Texas Instruments, Bangalore under Dr. K Radhakrishna Rao for a period of two and half months in summer 2009. In Spring 2011, he joined Dr. Harish Krishnaswamy’s research group as a PhD-track student. He graduated with his PhD in 2017. His PhD research focused on efficient, high-power precision RF and mmWave digital transmitter architectures.

Thesis Title: Efficient, High-Power Precision RF and mmWave Digital Transmitter Architectures
Current Position: Research Scientist, Intel Research, Hillsboro, OR
Awards and Honors: Columbia EE 2012 MS Award of Excellence

Tsung-Hao (Jeffrey) Chuang graduated from National Taiwan University in 2010 with a Bachelor’s degree in Electrical Engineering. He received the NTU EE Outstanding Undergraduate Research Award and the Lam Research Award in 2010. In August 2011, he joined Dr. Harish Krishnaswamy’s research group as a PhD-track student. He graduated with his PhD in Summer 2017.
Thesis Title: High-performance Local Oscillator Design for Next Generation Wireless Communication
Current Position: To join Apple, Cupertino, CA
Awards and Honors: Fall 2016 EGSC Professional Development Scholarship, 2015 Columbia EE Jacob Millman Prize for Excellence in Teaching Assistance

Tolga Dinc received his B.S. and M.S. in Electronics Engineering from Sabanci University, Istanbul in June 2010 and 2012, respectively. In the summer of 2009 and 2010, he held internship positions with IHP Microelectronics, Germany. He was a recepient of 2010 Microwave Theory and Techniques Society (MTT-S) Undergraduate/Pre-Graduate Scholarship Award. In August 2012, he joined Dr. Harish Krishnaswamy’s research group as a PhD-track student. He graduated with his PhD in September 2017.

Thesis Title: Architectures, Antennas and Circuits for Millimeter-wave Wireless Full-Duplex Applications
Current Position: RF/mmWave Engineer, Kilby Labs, Texas Instruments
Awards and Honors: 2017 Columbia EE Jury Award, 2016 Columbia EE Jacob Millman Prize for Excellence in Teaching Assistance, 2016 IEEE Microwave Theory and Techniques Society (MTT-S) Graduate Fellowship, 2015 IEEE RFIC Symposium Best Student Paper Award – 1st Place

Negar Reiskarimian graduated from Sharif University of Technology in 2011 with a Bachelor’s degree in Electrical Engineering, majoring in Telecommunications. She also received her Master’s degree in 2013 from Sharif University in Electrical Engineering, Microelectronic circuits. She joined Dr. Krishnaswamy’s research group in Fall 2013. She graduated with her PhD in May 2019.

Dissertation Title: Enabling fully-integrated magnetic-free non-reciprocal antenna interfaces by breaking Lorentz reciprocity: From physics to applications
First Employment: Assistant Professor, MIT (EECS)
Awards and Honors: 2021 IEEE MTT-S Microwave Magazine Best Paper Award, 2020 Morton B. Friedman Memorial Prize for Excellence, 2020 IEEE International Microwave Symposium Best Student Paper Award -2nd Place, 2019 Columbia EE Jury Award, DARPA Riser (DARPA 60th Anniversary Symposium), 2018 Forbes 30 Under 30 in Science, 2017 Rising Star in EECS, 2017 Marconi Society Paul Baran Young Scholar, 2017 IEEE Microwave Theory and Techniques Society (MTT-S) Graduate Fellowship, Caltech 2017 Young Investigator Lecturer in Engineering and Applied Science, ADI 2017 ISSCC Outstanding Student Designer Award, 2016-2017 IEEE SSCS Predoctoral Achievement Award, 2016 Qualcomm Innovation Fellowship

Mahmood Baraani Dastjerdi received the M.S. degree from Sharif University of Technology in 2014 where he worked on multi-signal receivers for global navigation satellite systems. In September 2015, he joined Dr. Harish Krishnaswamy’s research group as a PhD-track student. He graduated with his PhD in September 2019.

Dissertation Title: High-performance Multi-Antenna Wireless for 5G and Beyond
First Employment: Member of Technical Staff, MixComm Inc.
Awards and Honors: 2020 Columbia EE Jury Award, 2020 IEEE RFIC Symposium Best Student Paper Award – 2nd Place, 2019 ACM Mobihoc Best Paper Award Finalist
Creative Technology Award (Engineering Category) at the 2018 NYC Media Lab 100 Demo Expo, ADI 2018 ISSCC Outstanding Student Designer Award, 2018-2019 IEEE SSCS Predoctoral Achievement Award

​Sohail Ahasan graduated from the Indian Institute of Technology, Kharagpur in 2016 with a Bachelor’s degree in Electrical Engineering. He interned at Texas Instruments, India for a period of ten weeks in summer 2015. In 2016, he joined Dr. Harish Krishnaswamy’s research group as a PhD-track student. He graduated with his PhD in October 2021.

Dissertation Title: Architectures and integrated circuits leveraging N-phase passive mixers for applications in RF, Mm-wave and electro-optical systems
First Employment: Member of Technical Staff, Danger Devices
Awards and Honors: 2020 IEEE RFIC Symposium Best Student Paper Award – 2nd Place, ADI 2020 ISSCC Outstanding Student Designer Award, 2021 IEEE Microwave Theory and Techniques Society (MTT-S) Graduate Fellowship

Ali Binaie received his B.Sc. degree from Shiraz University, Iran with highest honors and his M.Sc. degree from Sharif University of Technology, Iran in 2012 and 2014 respectively in Electrical Engineering. He joined the University of Pavia, Italy, Analog Integrated Circuits Laboratory as a researcher working on an Electro-Optical Transceiver for data rates above 50Gb/s. He joined Dr. Krishnaswamy’s research group in Fall 2017 as a PhD-track student. He graduated with a PhD in August 2021.

Dissertation Title: LO-based analog signal processing in integrated circuits and systems: From RF to optics
First Employment: Broadcom
Awards and Honors: 2020 IEEE RFIC Symposium Best Student Paper Award – 2nd Place, FIO 2020 Jean Bennett Memorial Student Travel Grant Winner, 2021 Columbia EE Jacob Millman Prize for Excellence in Teaching Assistance, 2020-2021 IEEE SSCS Predoctoral Achievement Award

Aravind Nagulu received his Bachelor’s and Master’s degrees from IIT Madras in June 2016. He worked on Continuous Time Delta Sigma Modulator and Power line Notch Filter for his Master’s project. He interned in the PLL design group at Texas Instruments in Summer 2014. In Fall 2016, he joined Dr. Harish Krishnaswamy’s research group. He graduated with a PhD in December 2021.

Dissertation Title: Surpassing fundamental limits through time varying electromagnetics
First Employment: Assistant Professor, Washington University of St. Louis (ESE)
Awards and Honors: 2022 Columbia EE Jury Award, 2021 Columbia EE Collaborative Research Award, 2021 IEEE MTT-S Microwave Magazine Best Paper Award, 2020 IEEE RFIC Symposium Best Student Paper Award Finalist, 2019 IEEE Microwave Theory and Techniques Society (MTT-S) Graduate Fellowship, ADI 2019 ISSCC Outstanding Student Designer Award, 2018-2019 IEEE SSCS Predoctoral Achievement Award, 2018 IEEE RFIC Symposium Best Student Paper Award – 1st Place

Mohammad Khorshidian received his B.S. degree in Electrical Engineering with a major in Electronics from Sharif University of Technology in 2016. In January 2017, he joined Dr. Harish Krishnaswamy’s research group as a PhD-track student. He graduated with a PhD in January 2022.

Thesis topic: Advances in LPTV Circuits: From High Performance Filters to Magnetic-Free Inductor-less Nonreciprocal Components
First Employment: Apple
Awards and Honors: 2020 IEEE International Microwave Symposium Best Student Paper Award – 2nd Place, 2020-2021 IEEE SSCS Predoctoral Achievement Award, ADI 2020 ISSCC Outstanding Student Designer Award, 2019 Columbia EE MS Award of Excellence

Armagan Dascurcu graduated 2nd in class with B.S. degrees in electronics engineering and mechatronics engineering from Sabanci University, Istanbul, Turkey, in 2017 and an M.S. degree in electrical engineering from Columbia University, New York, in 2018, where she is currently pursuing a Ph.D. degree.

She was an undergraduate intern at European Organization for Nuclear Research (CERN) in the summer of 2015. During her Ph.D., she was a summer intern at IBM T.J. Watson Research Center in 2020 and 2021. Her research interests include RF/analog, mm-wave, and terahertz integrated circuits and systems in silicon/III-V technologies for phased-array and multi-input-multi-output systems.

Thesis topic: Architectures for millimeter-wave/terahertz CMOS phased arrays, MIMO systems and channel bonding
Awards and Honors: 2020 IEEE RFIC Symposium Best Student Paper Award – 2nd Place, ADI 2022 ISSCC Outstanding Student Designer Award