Research
ICaSL is broadly works at the intersection of electromagnetics and integrated circuits. Our research interests are in high frequency integrated circuits, reconfigurable metamaterials/metasurfaces, electromagnetics & antenna design, and computational sensing/imaging. We are interested in advancing end-to-end communication and sensor systems spanning from microwaves to terahertz frequencies. Our research has broad-range of applications in the areas of communications, imaging, biomedical sensing, machine-learning, and edge/node computing.
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Selected Publications
1. Active Reconfigurable Surfaces & Metasurfaces
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- 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*,H. Saeidi*, X. Lu, K. Sengupta, Active Tunable Millimeter-wave Reflective Surface across 57-64 GHz for Blockage Mitigation and Physical Layer Securit, RFIC 2022.
- C. Wu, Y. Ma, S. Venkatesh, et al., “A Monolithically Integrable Reconfigurable Antenna Based on Large-Area Electronics,” in IEEE Journal of Solid-State Circuits, 2024.
- 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.
- 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.
2. Millimeter-Wave and Terahertz Chip Scale Systems
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- 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.
- X. Lu*, S. Venkatesh*, et.al., “Physical Layer Security Through Directional Modulation With Spatio-Temporal Millimeter-Wave Transmitter Arrays,” in IEEE JSSC, 2024.
- H. Saeidi*, S. Venkatesh*, et.al, “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.
- H. Saeidi*, S. Venkatesh*, X. Lu and K. Sengupta, “THz Prism: One-Shot Simultaneous Localization of Multiple Wireless Nodes With Leaky-Wave THz Antennas and Transceivers in CMOS,” in IEEE JSSC, 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.
3. Computational Imaging and Sensing Systems
![](https://research.ece.ncsu.edu/sureshv/wp-content/uploads/sites/33/2024/07/Pic3-01-744x1024.png)
- S. Venkatesh, et al. “Origami Microwave Imaging Array: Metasurface Tiles on a Shape‐Morphing Surface for Reconfigurable Computational Imaging” Advanced Science 9.28 (2022), Cover Feature Article.
- H. Tang, S. Venkatesh,et al., “High Sensitivity and High Throughput Magnetic Flow CMOS Cytometers with 2D Oscillator Array and Inter-Sensor Spectrogram Cross-correlation,” in IEEE Transactions on Biomedical Circuits and Systems, 2024
- 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.
- N. Viswanathan, S. Venkatesh, D. Schurig, “Optimization of a Sparse Aperture Configuration for Millimeter wave Computational Imaging,” in IEEE Trans. Antenna and Propagation, 2020.
- S. Venkatesh, D. Schurig, “Transformation Optics Design of a Planar Near Field Magnifier for Sub-wavelength Imaging,” Optics Express, 27, 4694-4713, Feb 2019
- 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.
- 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 .