Research
My research is broadly at the intersection of electromagnetics and integrated circuits. My research interests are in electromagnetics & antenna theory, integrated circuits, metamaterials/metasurfaces, transformation optics design, and Imaging. I am interested in advancing end-to-end autonomous communication and sensor systems spanning from microwaves to terahertz frequencies. My research has broad-range of applications in the areas of communications, imaging, biomedical sensing, machine-learning, and edge/node computing. My Phd advisor was Prof. David Schurig. My Phd thesis can be found here.
I am currently an Assistant Professor at North Carolina State University, Electrical and Computer Department. Prior to joining NC State, I was a Research Associate Scholar at Princeton University. I am the recipient of Mistletoe Research Fellowship, 2021.
Please check in Google Scholar or Research Gate for the latest research articles.
Selected Publications:
1) Metamaterial Devices:
S.Venkatesh, X. Lu, H.Saeidi, K.Sengupta, "A High-Speed Programmable and Scalable Terahertz Holographic Metasurface based on Tiled CMOS Chips", Nature Electronics, 2020. Cover Feature Article
S. Venkatesh, X. Lu, H. Saeidi and K. Sengupta, "A Programmable Terahertz Metasurface With Circuit-Coupled Meta-Elements in Silicon Chips," in IEEE Antennas and Propagation Magazine, vol. 64, no. 4, pp. 110-122, Aug. 2022
S. Venkatesh, D. Shrekenhamer, W. Xu, S. Sonkusale, W. J. Padilla, and D. Schurig, “Interferometric direction finding with a metamaterial detector,” Applied Physics Letters, vol.103, no.25, 2013. [preprint]
D.Shrekenhamer, W. Xu, S. Venkatesh, D. Schurig, S. Sonkusale, and W. J. Padilla, “Experimental Realization of a Metamaterial Detector Focal Plane Array,” Phys.Rev.Lett., vol.109, p.177401, Oct.2012. [preprint]
2) Active Integrated Circuits:
S. Venkatesh*,H. Saeidi*, X. Lu, K. Sengupta, "Active Tunable Millimeter-wave Reflective Surface across 57-64 GHz for Blockage Mitigation and Physical Layer Security", RFIC, 2022.
S. Venkatesh, X. Lu, B. Tang, K. Sengupta, "Secure space–time-modulated millimetre-wave wireless links that are resilient to distributed eavesdropper attacks ", Nature Electronics, 2021.
H. Saeidi*, S. Venkatesh*, X. Lu, K. Sengupta, "THz Prism: One-Shot Simultaneous Multi-Node Angular Localization Using Spectrum-to-Space Mapping with 360-to-400GHz Broadband Transceiver and Dual-Port Integrated Leaky-Wave Antennas", ISSCC 2021.
X. Lu*, S. Venkatesh*, B. Tang, K. Sengupta, "Space-Time Modulated 71-to-76GHz mm-Wave Transmitter Array for Physically Secure Directional Wireless Links ", ISSCC 2020.
H. Saeidi, S. Venkatesh, et.al., "A 4×4 Distributed Multi-Layer Oscillator Network for Harmonic Injection and THz Beamforming with 14dBm EIRP at 416GHz in a Lensless 65nm CMOS IC", ISSCC 2020.
H. Tang, S. Venkatesh, et.al., "2D Magnetic Sensor Array for Real-time Cell Tracking and Multi-site Detection with Increased Robustness and Flow-rate", CICC 2019.
*Equal Contribution
3) Computational Imaging & Electrodynamics:
S. Venkatesh, et al. "Origami Microwave Imaging Array: Metasurface Tiles on a Shape‐Morphing Surface for Reconfigurable Computational Imaging" Advanced Science 9.28 (2022).
S. Venkatesh, N. Viswanathan, and D. Schurig, “W-band sparse synthetic aperture for computational imaging,” Opt.Express, vol.24, no.8, pp.8317–8331, 2016. [preprint]
S. Venkatesh and D. Schurig, “Computationally fast EM field propagation through axi-symmetric media using cylindrical harmonic decomposition,” Opt.Express, vol.24, no.25, pp.29246–29268, Dec2016. [preprint]
H. M. Bernety, S. Venkatesh, D. Schurig, “Fast ,Analytical Calculation of the Far-field for Arbitrarily-Oriented Antenna Arrays,” IEEE Transactions on Antennas and Propagation, 2018, 66 (6), 2911-2922 . [preprint]
HM Bernety, S Venkatesh, D Schurig, " Performance Analysis of a Helmet-Based Radar System for Impact Prediction," IEEE Access 6, 75124-7513. [preprint]
N. Viswanathan, S. Venkatesh, D. Schurig, “Optimization of a Sparse Aperture Configuration for Millimeter wave Computational Imaging,” in IEEE Trans. Antenna and Propagation, 2020.
4) Transformation Optics Design:
S. Venkatesh, D. Schurig, “Transformation Optics Design of a Planar Near Field Magnifier for Sub-wavelength Imaging," Optics Express, 27, 4694-4713, Feb 2019 . [preprint]
S. Venkatesh, N. Korevaar, D. Schurig, “Controlling the Twisting of Light,” [preprint]
5) Other Research Activities:
R. Abbasi et al., “First upper limits on the radar cross section of cosmic-ray induced extensive air showers,” Astroparticle Physics, vol.87, pp.1–17,2017. [preprint]
G. Joshi et al., “Separating hyperfine from spin-orbit interactions in organic semiconductors by multi-octave magnetic resonance using coplanar waveguide microresonators,” Appl.Phys.Lett., vol.109, p.103303, Sep.2016. [preprint]
R. Balasubramanyam, S. Venkatesh, and S. B. Raju, “12 GHz Radio-Holographic surface measurement of the RRI 10.4m telescope,” Astronomical Society of the Pacific, vol.407, Oct.2009. [preprint]