Principal Investigator

Harish KrishnaswamyPrincipal Investigator
Harish Krishnaswamy (S’03–M’09) received the B.Tech. degree in electrical engineering from IIT Madras, Chennai, India, in 2001, and the M.S. and Ph.D. degrees in electrical engineering from the University of Southern California (USC), Los Angeles, CA, USA, in 2003 and 2009, respectively. In 2009, he joined the Electrical Engineering Department, Columbia University, New York, NY, USA, where he is currently an Associate Professor and the Director of the Columbia High-Speed and Millimeter-Wave IC Laboratory (CoSMIC).

In 2017, he co-founded MixComm Inc., a venture-backed startup, to commercialize CoSMIC Laboratory’s advanced wireless research. His current research interests include integrated devices, circuits, and systems for a variety of RF, mmWave, and sub-mmWave applications.
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Dr. Krishnaswamy was a recipient of the IEEE International Solid-State Circuits Conference Lewis Winner Award for Outstanding Paper in 2007, the Best Thesis in Experimental Research Award from the USC Viterbi School of Engineering in 2009, the Defense Advanced Research Projects Agency Young Faculty Award in 2011, the 2014 IBM Faculty Award, the Best Demo Award at the 2017 IEEE ISSCC, and Best Student Paper Awards (First Place) at the 2015 and 2018 IEEE Radio Frequency Integrated Circuits Symposium . He has been a member of the technical program committee of several conferences, including the IEEE International Solid-State Circuits Conference since 2015 and the IEEE Radio Frequency Integrated Circuits Symposium since 2013. He currently serves as a Distinguished Lecturer for the IEEE Solid-State Circuits Society and as a member of the DARPA Microelectronics Exploratory Council.

PostDoctoral Scholars

Hazal Yüksel
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.
Tianwei Deng
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.
Ahmed Kord
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.

PhD Students

Negar Reiskarimian
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.
Jose A. Bahamonde
​Jose A. Bahamonde (jointly with Prof. John Kymissis) received a B.S. in Electrical Engineering from the University of Massachusetts, Amherst, in 2005 with a focus in Microwave Engineering. He, shortly thereafter, joined the Raytheon’s RF group in Andover, Massachusetts, where he gained experience in device modeling, testing, and MMIC design. In the spring of 2014, he joined Dr. Harish Krishnaswamy’s group.
Mahmood Baraani Dastjerdi
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.
Aditya Prabhakar Gaonkar
Aditya Prabhakar Gaonkar​ received his B.Tech degree in Electrical Engineering from IIT Madras in 2015. From July 2015 to July 2016, he worked as a research assistant under Prof. Prasanta Kumar Ghosh in the Dept. Of Electrical Engineering in the Indian Institute of Science, Bangalore. He joined Prof. Krishnaswamy’s group in Fall 2016.
Sohail Ahasan
​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.
Aravind Nagulu
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.
Armagan Dascurcu
Armagan Dascurcu will graduate with Bachelor’s degrees in Electronics Engineering and Mechatronics Engineering from Sabanci University, Istanbul in January 2017. She interned at European Organization for Nuclear Research (CERN) in the summer of 2015. She is a recipient of Fall 2016 Microwave Theory and Techniques Society (MTT-S) Undergraduate/Pre-graduate Scholarship Award. In Spring 2017, she joined Dr. Krishnaswamy’s research group as a Ph.D. track student.
Mohammad Khorshidian
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.
Naresh Kumar Adepu
Naresh Kumar Adepu received Bachelors (Hons) and Masters degrees from IIT Madras in June 2016. He was with TI till May 2017, as a Analog design engineer in Kilby Research Labs, where he worked on always-on ultra low power voice command detection systems. He interned in Purdue University in the summer of 2014. He is a recipient of Sir Achim Bopp Endowment Prize for the best hardware project of 2016 from IIT Madras for his Master’s project. In fall 2017, he joined Prof. Krishnaswamy’s research group.
Arman Galioglu
Arman Galioglu received the B.S. degree in Electronics Engineering with a minor in Physics and the M.Sc. degree in Electronics Engineering from Sabanci Universty, Istanbul, Turkey in 2015 and 2017 respectively. He has also held summer internship positions in IHP Microelectronics and Linz Institute for Organic Solar Cells in 2014 and 2015 respectively. He joined Dr. Krishnaswamy’s research group as a Ph.D. track student in Fall 2017.
Ali Binaie
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.
Mahdi Forghani
Mahdi Forghani received his Bachelor’s degree in Electrical Engineering with a minor in Economics from Sharif University of Technology in 2015. He graduated from Rice University in 2017 with a Master’s degree in Electrical Engineering, where he worked on novel RF frequency synthesizers under the supervision of Prof. Aydin Babakhani. In June 2018, he joined Dr. Harish Krishnaswamy’s research group as a PhD-track student.

PhD Alumni

Anandaroop Chakrabarti
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
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
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
​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
​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
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
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

MS Students

Former Visiting Scholars

Ziqiang Yang (Spring 2013-Fall 2013): mmWave power amplifiers, portability of digital TX.

Former Visiting Students

Mohammad Asgari (Summer 2011): Linear-yet-efficient RF power amplifiers.

Former BS/MS Students

Jian Chen (Spring 2010 – Fall 2010): Construction of an anechoic chamber. Characterization of UWB antennas, antenna arrays and beamforming networks (first job: Minicircuits).
William Lee (Summer 2010 – Fall 2010): Investigation of flicker-noise mechanisms in LC oscillators. Waveform/code design for Multi-beam ST-RAKE RADARs (first job: PMC Sierra).
Jian (Johnny) Chen (Fall 2010-Spring 2012): Efficient RF switching power amplifiers (first job: Marvell).
Ritesh Bhat (Fall 2010): Design of a discrete, UWB, Multi-beam ST-RAKE RADAR testbed (first job: Columbia EE PhD Program).
Luyao Shi (Fall 2011): Development of custom measurement automation software. (first job: SuperMicro)
Linxiao Zhang (Fall 2011 – Spring 2012): Broadband modeling of silicon-based passive components (first job: Columbia EE PhD Program).
Mohammad Asgari (Spring 2012 – Fall 2013): mmWave/THz high-gain amplifiers employing feedback, DSP for digital TX. (first job:
Parallel Development)
Bibhu Das (Summer 2012 – Spring 2013): Millimeter-wave power-amplifier packaging techniques.(first job: Cisco)
Akshay Shah (Summer 2012): Millimeter-wave/THz active and passive imaging. (first job: McKinsey and Company)
Artem Lakovlev (Fall 2012): 45GHz power DAC test fixture design. (first job: Algo-Logic)
Yuyin Xia (Fall 2012): WLAN 802.11a OFDM waveform study.
Ning Zhang (Fall 2012 – Spring 2013): FPGA-based digital RRC filter implementation, LVDS receiver design. (first job: Qualcomm)
Vaibhav Pandey (Fall 2012 – Spring 2013): VCDL-based digital RF phase modulator design. (first job: Broadcom)
Wei Pan (Spring 2013): 45GHz power DAC test fixture design. (first job: Mini-Circuits)
Linus Bohm (Spring 2013 – Fall 2013): UWB impulse radar demonstrator. (first job: University of Ulm PhD Program)
Supanath Juthacharoenwong (Summer 2013): FPGA-based DSP for software-defined radio platform.
Arun Srikanth Peri (Fall 2013): Digital calibration algorithms for FDD software-defined radios. (first job: Peregrine Semiconductor)
Amit Singh (Fall 2013): FDD software-defined radio demo design. (first job: Bell Labs)
Jose Bahamonde (Fall 2013): Active Waveguides on Silicon (jointly with Prof. John Kymissis) (first job: Columbia EE PhD Program).
Jiwon Park (Summer 2014-Fall 2014): Adaptive digital self-interference cancellation for full duplex radios.
Siva Mohan Reddy Chedulla (Summer 2014-Fall 2014): Digital TX test fixture design.
Yuhe Cao (Summer 2014-Fall 2014): Design of SMD LC duplexer filters. (first job: K U Leuven PhD Program)
Kashish Pal (Fall 2014): RF Class D VCOs. (first job: Peregrine Semiconductor)
Ashish Shukla (Spring 2015): Design of baseband amplifiers for 60GHz receivers. (first job: Hypres)
Sean Holloway (Fall 2015 – Spring 2016): Discrete FDE self-interference canceller design.
Sung J Kim (Fall 2015 – Spring 2016): Millimeter-wave antennas in package.
Gurkaranjot Kalra (Spring 2016-Spring 2017): Millimeter-wave switching power amplifiers
Sukanya Sagarika Meher (Summer 2016-Fall 2016): mmWave LNA design
Rupal Gupta (Fall 2016): mmWave LNA design
Sally Yu (Fall 2016 – Spring 2017): SMD-based antenna tuner design
Aishwarya Rajen (Summer 2017): Full-duplex testbed design