Oregon State High-Speed Integrated Circuits Lab


Journal Publications:
  1. K. Rasheed, A. Undavalli, S. Chakrabartty, A. Nagulu, A. Natarajan, “A Scalable and Instantaneously Wideband RF Correlator Based on Margin Computing,” accepted for publication in IEEE Journal of Solid-State Circuits
  2. A. Aghighi, M. Essawy and A. Natarajan, "A Frequency Doubler With Second Harmonic Feedback for Wideband, Efficient Frequency Multiplication at Millimeter-Wave," IEEE Transactions on Microwave Theory and Techniques, vol. 72, no. 5, pp. 2704-2715, May 2024.
  3. M. Essawy, A. Aghighi, K. Rashed and A. Natarajan, “A Low-Noise Dual-Path Self-Interference Cancellation Architecture for Watt-Level TX Power Handling in Simultaneous Transmit and Receive,” IEEE Journal of Solid-State Circuits, vol. 59, no. 5, pp. 1337-1350, May 2024.
  4. S. Garikapati, A. Nagulu, I. Kadota, M. Essawy, T. Chen, S. Wang, T. Pande, A. Natarajan, G. Zussman, and H. Krishnaswamy, “Full-Duplex Receiver with Wideband, High-Power RF Self-Interference Cancellation Based on Capacitor Stacking in Switched-Capacitor Delay Lines,” IEEE Journal of Solid-State Circuits, vol. 59, no. 7, pp. 2105-2120, July 2024.
  5. H. Bialek, M. L. Johnston, and A. Natarajan, "A Highly Integrated Distributed Mixer Receiver for Low-Power Wireless Radios," IEEE Journal of Solid-State Circuits, vol. 58, pp. 3421-3432, Oct. 2023.
  6. K. R. Sadagopan and A. Natarajan, "A 2.4GHz Wideband Wireless Harvester with Integrated Autonomous RF Input-Frequency Tracking for FCC-Compatible Chip-scale Battery Charging," accepted for publication in the IEEE Open Journal of the Solid State Circuits Society.
  7. R. Garg, S. Jain, and A. Natarajan, “Wideband, Millimeter Wave Domain SI Canceling (> 50dB) In-band Full-duplex Circulator Receiver,” IEEE Access, vol. 10, pp. 37953-37966, Oct. 2022.
  8. H. Bialek, A. Binaie, S. Ahasan, K. R. Sadagopan, M. L. Johnston, H. Krishnaswamy, and A. Natarajan, “A Passive Wideband Noise-Cancelling Mixer-First Architecture with Shared Antenna Interface for Interferer-Tolerant Wake-up Receivers and Low-noise Primary Receivers,” IEEE Journal of Solid-State Circuits (invited), vol. 57, no. 9, pp. 2611-2625, Sep. 2022.
  9. S. Jain, A. Agrawal, R. Garg, and A. Natarajan, “Recent Developments in Integrated Interferer-Tolerant Receivers for Reconfigurable Radios,” IEEE Journal of Microwaves, vol. 1, no. 3, pp. 723-737, July 2021.
  10. S. Ahasan, A. Binaie, A. Dascurcu, M. B. Dastjerdi, R. Garg, M. Johnson, A. Galioglu, A. Natarajan, and H. Krishnaswamy, “Frequency-Domain-Multiplexing Single-Wire Interface and Harmonic-Rejection-Based IF Data De-Multiplexing in Millimeter-Wave MIMO Arrays,” IEEE Journal of Solid-State Circuits, vol. 56, no. 5, pp. 1360-1373, May 2021 (invited).
  11. R. Garg, G. Sharma, A. Binaie, S. Jain, S. Ahasan, A. Dascurcu, H. Krishnaswamy, and A. Natarajan, “A 28-GHz Beam-Space MIMO RX With Spatial Filtering and Frequency-Division Multiplexing-Based Single-Wire IF Interface,” IEEE Journal of Solid-State Circuits (invited), vol. 56, no. 8, pp. 2295-2307, Aug. 2021
  12. M. Johnson, A. Dascurcu, K. Zhan, A. Galioglu, N. Adepu, S. Jain, H. Krishnaswamy, and A. Natarajan, "Code-Domain Multiplexing for Shared IF/LO Interfaces in Millimeter-Wave MIMO Arrays," IEEE Journal of Solid-State Circuits, vol. 55, no. 5, pp. 1270-1281, May 2020 (invited).
  13. S. Liverman, H. Bialek, A. Natarajan, and A. X. Wang, "VCSEL Array-Based Gigabit Free-Space Optical Femtocell Communication," in Journal of Lightwave Technology, vol. 38, no. 7, pp. 1659-1667, 1 April1, 2020.
  14. M. B. Dastjerdi, S. Jain, A. Natarajan, and H. Krishnaswamy, "Analysis and Design of Full-Duplex 2x2 MIMO Circulator-Receiver with High-TX Power Handling Exploiting RF MIMO and Shared-Delay Baseband Self-Interface Cancellation," in IEEE Journal of Solid-State Circuits, vol. 54, no. 12, pp. 3525 - 3540, Dec. 2019 (invited).
  15. A. Ramachandran, A. Natarajan, and T. Anand, "Line Coding Techniques for Channel Equalization: Integrated Pulse-Width Modulation and Consecutive Digit Chopping," IEEE Trans. on Circuits and Systems I: Regular Papers, vol. 66, no. 3, pp. 1192-1204, March 2019.
  16. K. R. Sadagopan, J. Kang, Y. Ramadass, and A. Natarajan, "A cm-Scale 2.4-GHz Wireless Energy Harvester With NanoWatt Boost Converter and Antenna-Rectifier Resonance for WiFi Powering of Sensor Nodes," in IEEE Journal of Solid-State Circuits, vol. 53, no. 12, pp. 3396-3406, Dec. 2018 (invited).
  17. A. Agrawal and A. Natarajan, "Analysis and Design of N-Path RF Bandstop Filters Using Walsh-Function-Based Sequence Mixing," IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 11, pp. 4830-4843, Nov. 2018.
  18. J. Kang, P. Chiang, and A. Natarajan, "Bootstrapped Rectifier-Antenna Co-Integration for Increased Sensitivity in Wirelessly-Powered Sensors," IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 11, pp. 5031-5041, Nov. 2018.
  19. S. Liverman, Q. Wang, Y.-J. Chu, A. Borah, S. Wang, A. Natarajan, A. Wang, and T. Nguyen, "WiFO: A hybrid communication network based on integrated free-space optical and WiFi femtocells," Computer Communications, vol. 132, pp. 74-84, Nov. 2018
  20. A. Agrawal and A. Natarajan, "An Interferer-Tolerant CMOS Code-Domain Receiver Based on N-Path Filters," IEEE Journal of Solid-State Circuits, vol. 53, no. 5, pp. 1387-1397, May 2018 (invited).
  21. R. Garg and A. Natarajan, "A 28-GHz Low-Power Phased-Array Receiver Front-End With 360° RTPS Phase Shift Range," in IEEE Transactions on Microwave Theory and Techniques, vol. 65, no. 11, pp. 4703-4714, Nov. 2017.
  22. A. Agrawal and A. Natarajan, “Series Resonator Mode-Switching for Area-Efficient Octave Tuning-Range CMOS LC Oscillators,” IEEE Transactions on Microwave Theory and Techniques, vol. 65, no. 5, pp. 1569-1579, May 2017.
  23. L. Zhang, A. Natarajan, and H. Krishnaswamy, “Scalable Spatial Notch Suppression in Spatio-Spectral-Filtering MIMO Receiver Arrays for Digital Beamforming,” IEEE Journal of Solid-State Circuits, vol. 51, no. 12, pp. 3152-3166, Dec. 2016.
  24. J. Kang, S. Rao, P. Chiang, and A. Natarajan, “Design and Optimization of Area-Constrained Wirelessly-Powered CMOS UWB SoC for Localization Applications”, IEEE Transactions on Microwave Theory and Techniques, vol. 64, no. 4, pp. 1042-1054, April 2016.
  25. Y. Liu, A. Agrawal, and A. Natarajan, “Millimeter-wave IC-Antenna Cointegration for Integrated Transmitters and Receivers,” in IEEE Antennas and Wireless Propagation Letters, vol. 15, pp. 1848-1852, Mar. 2016.
  26. X. Gu, A. Valdes-Garcia, A. Natarajan, B. Sadhu, D. Liu and S. K. Reynolds, “W-band Scalable Phased Arrays for Imaging and Communications,” IEEE Communications Magazine, vol. 54, no. 4, pp. 196-204 Apr. 2015.
  27. A. Natarajan, A. Valdes-Garcia, B. Sadhu, S. Reynolds, and B. Parker, “W-Band Dual-Polarization Phased-Array Transceiver Frontend in SiGe BiCMOS,” IEEE Transactions on Microwave Theory and Techniques, vol. 63, no. 6, pp. 1989-2002, June 2015.
  28. J. Cheng, N. Qi, P. Chiang, and A. Natarajan, "A Low-Power, Low-Voltage WBAN-Compatible Sub-Sampling PSK Receiver in 65 nm CMOS," IEEE Journal of Solid-State Circuits (JSSC), vol.49, no.12, pp. 3018-3030, Dec. 2014.
  29. S. Sun, F. Wang, S. Yaldiz, X. Li, L. Pileggi, A. Natarajan, M. Ferriss, J.-O. Plouchart, B. Sadhu, B. Parker, A. Valdes-Garcia, M. Sanduleanu, J. Tierno, and D. Friedman, "Indirect Performance Sensing for On-Chip Self-Healing of Analog and RF Circuits," IEEE Transactions of Circuits and Systems-I, vol. 61, no. 8, pp. 2243-2252, Aug. 2014.
  30. J.-O. Plouchart, M. Ferriss, A. Natarajan, A. Valdes-Garcia, B. Sadhu, A. Rylyakov, B. Parker, M. Beakes, A. Babakhani, S. Yaldiz, L. Pileggi, R. Harjani, S. Reynolds, J. A. Tierno, and D. Friedman, "A 23.5GHz PLL with an Adaptively Biased VCO in 32nm SOI-CMOS," IEEE Transactions of Circuits and Systems-I, vol. 60, Aug. 2013, pp. 2009-2017.
  31. B. Sadhu, M. Ferriss, A. Natarajan, S. Yaldiz, J.-O. Plouchart, A. Rylyakov, A. Valdes-Garcia, B. Parker, A. Babakhani, S. Reynolds, X. Li, L. Pileggi, R. Harjani, J. Tierno, and D. Friedman, "A Linearized, Low Phase Noise VCO Based 25GHz PLL with Autonomic Biasing," IEEE Journal of Solid-State Circuits, vol. 48, May 2013, pp. 1138-1150.
  32. M. Ferriss, J. -O. Plouchart, A. Natarajan, A. Rylyakov, B. Parker, J. Tierno, A. Babakhani, S. Yaldiz, A. Valdes-Garcia, B. Sadhu, and D. Friedman, "An Integral Path Self-Calibration Scheme for a Dual-Loop PLL," IEEE Journal of Solid-State Circuits, vol. 48, Mar. 2013.

    33. Pre-Oregon State University:

  33. D. G. Kam, D. Liu, A. Natarajan, S. Reynolds, and B. A. Floyd, “Organic Packages with Embedded Phased-Array Antennas for 60-GHz Wireless Chipsets,” IEEE Transactions on Components, Packaging and Manufacturing Technology. vol. 1, Nov. 2011, pp. 1806-1814.
  34. A. Natarajan, S.K. Reynolds, M. D. Tsai, S.T. Nicolson, J.-H.C. Zhan, D. G. Kam, D. Liu, Y.-L.O. Huang, A. Valdes-Garcia, and B. Floyd, “A Fully-Integrated 16-Element Phased-Array Receiver in SiGe BiCMOS for 60-GHz Communications,” IEEE Journal of Solid-State Circuits, vol. 46, May 2011, pp. 1059-1075.
  35. A. Valdes-Garcia, S. Reynolds, A. Natarajan, D. Kam, D. Liu, J.-W. Lai, Y.-L.O. Huang, P.-Y. Chen, M.-D. Tsai, J.-H.C. Zhan, S. Nicolson, and B. Floyd, “Single-Element and Phased-Array Transceiver Chipsets for 60-ghz Gb/s Communications,” IEEE Communications Magazine, vol. 49, Apr. 2011, pp.120-131.
  36. D. G. Kam, D. Liu, A. Natarajan, S. Reynolds, H-C. Chen, and B. A. Floyd, “LTCC Packages With Embedded Phased-Array Antennas for 60 GHz Communications,” IEEE Microwave and Wireless Components Letters, vol. 21, Mar. 2011, pp. 142-144.
  37. A. Valdes-Garcia, S.T. Nicolson, J.-W. Lai, A. Natarajan, P.-Y. Chen, S.K. Reynolds, J.-H.C. Zhan, D.G. Kam, D. Liu, and B.A. Floyd, “A Fully Integrated 16-Element Phased-Array Transmitter in SiGe BiCMOS for 60-GHz Communications,” IEEE Journal of Solid-State Circuits, vol. 45, Dec. 2010, pp. 2757-2773.
  38. S. Jeon, Y-J. Wang, H. Wang, F. Bohn, A. Natarajan, A. Babakhani, and A. Hajimiri, “A Scalable 6-to-18 GHz Concurrent Dual-Band Quad-Beam Phased-Array Receiver in CMOS,” IEEE Journal of Solid-State Circuits, vol. 43, Dec. 2008, pp. 2660-2673.
  39. A. Babakhani, X. Guan, A. Komijani, A. Natarajan, and A. Hajimiri, “A 77-GHz Phased-Array Transceiver with On-Chip Antennas in Silicon: Receiver and Antennas,” IEEE Journal of SolidState Circuits, vol. 41, Dec. 2006, pp. 2795-2806.
  40. A. Natarajan, A. Komijani, X. Guan, A. Babakhani, and A. Hajimiri, “A 77-GHz Phased-Array Transceiver with On-Chip Antennas in Silicon: Transmitter and Local LO-Path Phase Shifting,” IEEE Journal of Solid-State Circuits, vol. 41, Dec. 2006, pp. 2807-2819.
  41. A. Natarajan, A. Komijani, and A. Hajimiri, “A Fully Integrated 24-GHz Phased-Array Transmitter in CMOS,” IEEE Journal of Solid-State Circuits, vol. 40, Dec. 2005, pp. 2502-2514.
  42. A. Komijani, A. Natarajan, and A. Hajimiri, “A 24-GHz, +14.5-dBm Fully Integrated Power Amplifier in 0.18-µm CMOS,” IEEE Journal of Solid-State Circuits, vol. 40, Sep. 2005, pp. 1901-1908.
  43. A. Hajimiri, H. Hashemi, A. Natarajan, X. Guan, and A. Komijani, “Integrated Phased Array Systems in Silicon,” Proceedings of the IEEE, vol. 93, Sep. 2005, pp. 1637-1655.
  44. A. Hajimiri, A. Komijani, A. Natarajan, R. Chunara, X. Guan, and H. Hashemi, “Phased Array Systems in Silicon,” IEEE Communications Magazine, vol. 42, Aug. 2004, pp. 122-130.


Conference Papers:
  1. A. Undavalli, K. Rashed, S. Chakrabartty, A. Natarajan and A. Nagulu, “A 4GS/s Fully Analog 256×256 MP-Based Cross-Correlator with 1000 TOPS/W Compute Efficiency and 1.3 TOPS/mm2 Compute Density in 22nm SOI CMOS,” accepted and to appear in the IEEE International Solid-State Circuits Conference (ISSCC) 2025.
  2. K. Rashed, A. C. Undavalli, S. Chakrabartty, A. Natarajan and A. Nagulu, "Reconfigurable Matched Filtering Using Wideband Margin-Computing Correlators: Applications in Radar and Communication Signal Processing,” Midwest Symposium on Circuits and Systems (MWSCAS), Aug. 2024
  3. K. Rashed, A. C. Undavalli, S. Chakrabartty, A. Nagulu and A. Natarajan, “An 8-bit ENOB, 1024-Length, 5GS/s RF Correlator based on Charge Thresholding,” GOMACTech, March 2024.
  4. K. Rashed, A. Undavalli, S. Chakrabartty, A. Nagulu, and A. Natarajan, “A Scalable and Instantaneously Wideband 5GS/s RF Correlator based on Charge Thresholding achieving 8-bit ENOB and 152 TOPS/W Compute Efficiency,” IEEE Intl. Solid-State Circuits Conf. (ISSCC), Feb. 2024.
  5. K. Rashed, A. Undavalli, S. Chakrabartty, A. Nagulu, and A. Natarajan, "A Scalable and Instantaneously Wideband 5GS/s RF Correlator based on Charge Thresholding achieving 8-bit ENOB and 152 TOPS/W Compute Efficiency", accepted to the 2024 IEEE Intl. Solid-State Circuits Conf. (ISSCC)
  6. S. Gupta, B. Jann, M. Essawy, K. Rashed, and A. Natarajan, “A Broadband LNA and Sub-Harmonic Mixer Based Multi-Mode Rx in 22nm CMOS,” 2023 European Microwave Integrated Circuits Conference (EuMIC), 2023
  7. A. Aghighi, M. Essawy, A. Natarajan, “A 47GHz to 70GHz Frequency Doubler Exploiting 2nd-Harmonic Feedback with 10.1dBm Psat and 𝜂𝑡𝑜𝑡𝑎𝑙 of 22% in 65nm CMOS," IEEE Radio Freq. Integrated Circuits Symp. (RFIC), June 2023
  8. M. Essawy, K. Rashed, A. Aghighi, A. Natarajan, “A Frequency-Tunable Dual-Path Frequency-Translated Noise-Cancelling Self-Interference Canceller RX with >16dBm SI Power-Handling in 65nm CMOS," IEEE Radio Freq. Integrated Circuits Symp. (RFIC), June 2023
  9. H. Bialek, M. Johnston, and A. Natarajan, “A 0.4GHz to 0.95GHz Distributed N-path Noise-canceling Ultra-Low Power RX with Integrated Passives Achieving –85dBm/100kb/s Sensitivity, -41dB SIR and 174dB RX FoM in 22nm CMOS,” IEEE Intl. Solid-State Circuits Conference (ISSCC), Feb. 2023
  10. A. Dascurcu, S. Ahasan, A. Binaie, K. J. Lu, A. Natarajan, and H. Krishnaswamy, “A 60GHz Phased Array Transceiver Chipset in 45nm RF-SOI Featuring Channel Aggregation Using HRM-Based Frequency Interleaving,” IEEE Radio Freq. Integrated Circuits Symp. (RFIC), June 2022
  11. R. Garg, P. Dania, G. Sharma, A. Dascurcu, S. Gupta, H. Krishnaswamy, and A. Natarajan, “A 28 GHz/39 GHz Dual-Band Four-Element MIMO RX with Beamspace Multiplexing at IF in 65-nm CMOS,” IEEE Radio Freq. Integrated Circuits Symp. (RFIC), June 2022
  12. S. Bulumulla, S. Rahman, A. Natarajan and H. Krishnaswamy, “A 16 element antenna integrated package for 37 – 40GHz operation,” IEEE 72nd Electronic Components and Technology Conference (ECTC), 2022, pp. 347-352.
  13. P. Srinivasan, F. Guarin, E. Gantsog, H. Krishnaswamy, and A. Natarajan, “Excellent RF Product HTOL reliability of 5G mmWave beamformer chip fabricated using GF 45RFSOI technologies,” IEEE International Reliability Physics Symposium (IRPS), March 2022
  14. A. Aghighi, M. Essawy, and A. Natarajan, “A mm-Wave FMCW Radar RX Frontend in CMOS with Modulated Self-Interference Cancellation Path,” IEEE Radio Wireless Week (RWW), Jan 2022 (Best Student Paper Finalist)
  15. M. Essawy, A. Aghighi, H. Bialek, A. Nagulu, H. Krishnaswamy, and A. Natarajan, “A Noise-Cancelling Self-Interference Canceller with +7dBm Self-Interference Power Handling in 0.18μm CMOS,” IEEE Radio Freq. Integrated Circuits Conf. (RFIC), June 2021
  16. C. Trotter, S. Liverman, L. Bouchard, H. Bialek, T. Nguyen, A. Natarajan, A. X. Wang, “Gigabit Indoor Free-Space Optical Communication Enhanced by Dynamic Beam Control,” Conference on Lasers and Electro-Optics (CLEO), May 2021
  17. J. Kim, C. Votzke, S. Bose, A. Natarajan and M. L. Johnston, “A 20 μW, 0.05mm2 Duty-Cycled Resistor and Frequency-Locked-Loop-based Wheatstone Bridge Interface for Low Resistance Sensing Systems,” 2021 IEEE Custom Integrated Circuits Conference (CICC), Apr. 2021
  18. R. Garg, S. Jain, P. Dania, and A. Natarajan, "A 28GHz Full-Duplex Circulator Receiver with 53dB/400MHz (40dB/800MHz) Self- Interference Cancellation for mm-Wave Repeaters," accepted for presentation at IEEE ISSCC, Feb. 2021.
  19. H. Bialek, S. Ahasan, A. Binaie, K. R. Sadagopan, M. Johnston, H. Krishnaswamy, and A. Natarajan, “A 0.75GHz to 1GHz Passive Wideband Noise-Cancelling 171uW Wake-up RX and 440uW Primary RXFE with -86dBm/10kbps sensitivity, 35dB SIR and 3.8 dB RX NF,” accepted for presentation at IEEE ISSCC, Feb. 2021.
  20. B. Jann, S. Jain, A. Ravi, S. Patnaik, and Arun Natarajan, "28GHz RX frontends with sub-harmonic-based mm-wave LO Generation in 16nm CMOS," accepted for presentation at IEEE Radio Wireless Week (RWW), Jan. 2021
  21. A. Binaie, S. Ahasan, A. Dascurcu, M. B. Dastjerdi, R. Garg, M. Johnson, A. Galioglu, A. Natarajan, and H. Krishnaswamy, "A Scalable 60GHz 4-Element MIMO Transmitter with a Frequency-Domain-Multiplexing Single-Wire Interface and Harmonic-Rejection-Based De-Multiplexing," IEEE RFIC, Aug. 2020 (Best Paper, 2nd Place)
  22. H. Bialek, M. L. Johnston, and A. Natarajan, “A 6-Transistor Ultra-Low Power CMOS VoltageReference with 0.02%/V Line Sensitivity”, in IEEE CICC, Mar. 2020.
  23. R. Garg, G. Sharma, A. Binaie, S. Jain, S. Ahasan, A. Dascurcu, H. Krishnaswamy, and A. Natarajan, "A 28GHz 4-Element MIMO Beam-Space Array in 65nm CMOS with Simultaneous Spatial Filtering and Single-Wire Frequency-Domain Multiplexing," IEEE ISSCC, Feb. 2020.
  24. M. Johnson, A. Dascurcu, K. Zhan, A. Galioglu, N. Adepu, S. Jain, H. Krishnaswamy, and A. Natarajan, "A 4-element 28GHz millimeter-wmave MIMO array with single-wire interface using code-domain multiplexing in 65nm CMOS," IEEE RFIC, June 2019.
  25. Y. Liu and A. Natarajan, "A 60 GHz Polarization-Duplex TX/RX Front-End with Dual-Pol Antenna-IC Co-Integration in SiGe BiCMOS," IEEE RFIC, June 2019.
  26. M. Johnson, A. Agrawal, and A. Natarajan, "Frequency/Code-Domain Filtering Using Walsh-Function Sequence Based N-path Filters," IEEE IMS, June 2019
  27. K. Zhan, Y. Liu, T. Kamgaing, R. Khanna, G. Dogiamis, H. Liu and A. Natarajan, "A Low-Power FSK/Spatial Modulation Receiver for Short-Range mm-Wave Wireless Links," IEEE IMS, June 2019, pp. 492-495.
  28. S. Liverman, S. Chen, A. Natarajan, T. Nguyen, and A. X. Wang, "Hybrid Femtocell-Attocell Optical Links for High-Speed Indoor Wireless Network," Conference on Lasers and Electro-Optics (CLEO), May 2019
  29. M. Baraani Dastjerdi, S. Jain, N. Reiskarimian, A. Natarajan, and H. Krishnaswamy, “Full-Duplex 2×2 MIMO Circulator-Receiver with High TX Power Handling Exploiting MIMO RF and Shared-Delay Baseband Self-Interference Cancellation”, IEEE ISSCC, Feb. 2019.
  30. K. Raghavan, J. Kang, Y. Ramadass, and A. Natarajan, “A 960pW Co-Integrated-Antenna Wireless Energy Harvester for WiFi Backchannel Wireless Powering”, IEEE ISSCC, Feb. 2018.
  31. S. Jain, A. Agrawal, M. Johnson, and A. Natarajan, “An 0.55GHz-0.9GHz 2.7dB NF Full-Duplex Hybrid-Coupler Circulator with 56MHz 40dB TX SI Suppression”, IEEE ISSCC, Feb. 2018.
  32. S. Liverman, Q. Wang, Y-C. Chu, A. Borah, S. Wang, A. Natarajan, T. Nguyen, and A. Wang, "Indoor communications networks realized through hybrid free-space optical and Wi-Fi links", Proc. SPIE 10559, Broadband Access Communication Technologies XII, 105590H, Jan. 2018
  33. Y. Liu and A. Natarajan, "60 GHz concurrent dual-polarization RX front-end in SiGe with Antenna-IC Co-Integration," IEEE Bipolar/BiCMOS Circuits and Technology Meeting (BCTM), Oct. 2017
  34. Q. Wang, S. Liverman, Y-J. Chu, A. Borah, S. Wang, T. Nguyen, A. Natarajan, and A. Wang, "WiFO: A Hybrid WiFi Free-Space Optical Communication Networks of Femtocells," Proc. of 20th ACM Intl. Conf. on Modelling, Analysis and Simulation of Wireless and Mobile Systems, pp. 35-42, Nov. 2017
  35. A. Agrawal and A. Natarajan, “A 0.3 GHz to 1.4 GHz N-path Mixer-based Code-Domain RX with TX Self-Interference Rejection”, IEEE RFIC, June 2017
  36. K. Raghavan, J. Kang, S. Jain, Y. Ramadass, and A. Natarajan, “A 365nW -61.5dBm Sensitivity, 1.875cm2 2.4GHz Wake-up Receiver with Rectifier-Antenna Co-design for Passive Gain,” IEEE RFIC, June 2017
  37. A. Agrawal and A. Natarajan, “A Concurrent Dual-Frequency/Angle-of-Incidence Spatio-spectral Notch Filter using Walsh Function Passive Sequence Mixers,” IEEE IMS, June 2017
  38. K. Zhan, A. Agrawal, M. Johnson, A. Ramachandran, T. Anand, and A. Natarajan, “An Integrated 7-Gb/s 60-GHz Communication Link Over Single Conductor Wire using Sommerfeld Wave Propagation in 65-nm CMOS,” IEEE IMS, June 2017
  39. K. Zhan, J. Kang, G. Wang, T. Kamgaing, R. Khanna, H. Liu, and A. Natarajan, “A Low-Power FSK/Spatial Modulation Transmitter for mm-Wave Wireless Links,” IEEE IMS, June 2017
  40. A. Ramachandran, A. Natarajan, and T. Anand, “A 16Gb/s, 3.6pJ/bit Wireline Transceiver with Phase Domain Equalization Scheme: Integrated Pulse Width Modulation (iPWM) in 65nm CMOS,” IEEE Intl. Solid-State Circuits Conf. (ISSCC), Feb. 2017.
  41. G. Wang, K. Zhan, T. Kamgaing, R. Khanna, H. Liu, and A. Natarajan, "Measurement-based channel modeling for mmWave wireless links in enclosed server platforms," 2017 IEEE Radio and Wireless Symposium (RWS), Phoenix, AZ, 2017, pp. 141-143.
  42. S. Liverman, Q. Wang, Y.-J. Chu, A. Natarajan, T. Nguyen, and A. Wang, "Hybrid wireless communication networks: Integrating free-space optics and Wi-Fi," in OSA Frontiers in Optics, Oct. 2016
  43. S. Jain, Y. Wang, and A. Natarajan, "A 10GHz CMOS RX Frontend with Spatial Cancellation of Co-channel Interferers for MIMO/Digital Beamforming Arrays,” IEEE RFIC Symp., May 2016
  44. A. Tork and A. Natarajan, “Reconfigurable X-Band 4_4 Butler Array in 32nm CMOS SOI for Angle-Reject Arrays” to be presented at IEEE International Microw. Symp. (IMS), May 2016
  45. L. Zhang, A. Natarajan, and H. Krishnaswamy, "A Scalable 0.1-to-1.7GHz Spatio-Spectral-Filtering 4-Element MIMO Receiver Array with Spatial Notch Suppression Enabling Digital Beamforming", IEEE Intl. Solid-State Circuits Symp. (ISSCC), Feb. 2016
  46. A. Agrawal and A. Natarajan, “A Scalable 28GHz Coupled-PLL in 65nm CMOS with Single-Wire Synchronization for Large-Scale 5G mm-Wave Arrays”, IEEE Intl. Solid-State Circuits Symp. (ISSCC), Feb 2016
  47. J. Kang, P. Chiang, and A. Natarajan, “A 1.2cm2 2.4GHz Self-Oscillating Rectifier-Antenna Achieving -34.5dBm Sensitivity for Wirelessly Powered Sensors”, IEEE Intl. Solid-State Circuits Symp. (ISSCC), Feb 2016
  48. Y. Wang, Y. Liu, A. Agrawal, and A. Natarajan, "A 74.6GHz - 83.6GHz Digitally Controlled Oscillator with 370kHz Frequency Resolution in 65nm CMOS", IEEE Topical Meetings on Silicon Monolithic Integrated Circuits in RF Systems (SiRF), Jan 2016
  49. J. Kang, S. Rao, P. Chiang, and A. Natarajan, "Area-constrained Wirelessly-Powered UWB SoC Design for Small Insect Localization", invited to IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Jan 2016
  50. A. Agrawal and A. Natarajan, “A 6.39GHz-14GHz Series Resonator Mode-Switching Oscillator with 186-188dB FoM and 197dB FoMA in 65nm CMOS”, IEEE Radio Freq. IC Symp. (RFIC), May 2015
  51. J. Kang, P. Chiang, and A. Natarajan, “A 3.6 cm2 Wirelessly-Powered UWB SoC with -30.7dBm Rectifier Sensitivity and Sub-10cm Range Resolution”, IEEE Radio Freq. IC Symp. (RFIC), May 2015, (nominated for Best Student Paper Award)
  52. X. Gu, D. Liu, C. Baks, A. Valdes-Garcia, B. Parker, Md. R. Islam, A. Natarajan, and S. Reynolds, "A Compact Four-Chip Package with 64 Embedded Dual-Polarization Antennas for W-Band Phased-Array Transceivers," IEEE Electronic Components and Technology Conference (ECTC), May 2014
  53. A. Valdes-Garcia, A. Natarajan, X. Gu, D. Liu, B. Sadhu, M. Sandulenau, M. Ferriss, C. Baks, J.-O. Plouchart, H. Ainspan, B. Parker, and S. Reynolds, "A Scalable System-in-Package Dual-Polarization 64-Element 94GHz Phased-Array Transceiver," Government Microcircuits Applications and Critical Technology Conference (GOMAC), Mar. 2014.
  54. J. Cheng, N. Qi, P. Y. Chiang, and A. Natarajan, “A 1.3mW, 0.6V, WBAN-Compatible, Sub-Sampling PSK Receiver in 65nm-CMOS,” to be presented at IEEE International Solid-State Circuits Conference (ISSCC), Feb. 2014.
  55. S. Sun, F. Wang, S. Yaldiz, X. Li, L. Pileggi, A. Natarajan, M. Ferriss, J.-O.Plouchart, B. Sadhu, B. Parker, A. Valdes-Garcia, M. Sanduleanu, J. Tierno, and D. Friedman, "Indirect performance sensing for on-chip analog self-healing via Bayesian model fusion," IEEE Custom Integrated Circuits Conference (CICC), Sept. 2013.
  56. A. Valdes-Garcia, A. Natarajan, D. Liu, M. Sanduleanu, X. Gu, M. Ferriss, B. Parker, C. Baks, J.-O. Plouchart, H. Ainspan, B. Sadhu, Md. R. Islam, and S. Reynolds, "A Fully-Integrated Dual-Polarization 16-Element W-band Phased-Array Transceiver in SiGe BiCMOS," IEEE Radio Frequency Integrated Circuits Symposium (RFIC), June 2013.
  57. X. Gu, D. G. Kam, D. Liu, M. Piz, A. Valdes-Garcia, A. Natarajan, C. Baks, B. Sadhu, and S. Reynolds, "Enhanced multilayer organic packages with embedded phased-array antennas for 60-GHz wireless communications," IEEE Electronic Components and Technology Conference (ECTC), May 2013
  58. A. Valdes-Garcia, A. Natarajan, D. Liu, M. Sanduleanu, X. Gu, M. Ferriss, B. Parker, C. Baks, J.-O. Plouchart, H. Ainspan, B. Sadhu, Md. R. Islam, and S. Reynolds, "A 16-Tx, 32-Rx W-Band SiGe Phased-Array Transceiver IC and Package with Integrated Antennas for Scalable Radar and Imaging Applications," Government Microcircuits Applications and Critical Technology Conference (GOMAC), Mar. 2013.
  59. J.-O. Plouchart, M. Ferriss, A. Natarajan, A. Valdes-Garcia, B. Sadhu, A. Rylyakov, B. Parker, M. Beakes, A. Babakhani, S. Yaldiz, L. Pileggi, R. Harjani, S. Reynolds, J. Tierno, and D. Friedman, "A 23.5GHz PLL with an adaptively biased VCO in 32nm SOI-CMOS," IEEE Custom Integrated Circuits Conference (CICC), Sep. 2012, pp. 1-4.

    60. Pre-Oregon State University:

  60. B. Sadhu, M. Ferriss, J.-O. Plouchart, A. Natarajan, A. Rylyakov, A. Valdes-Garcia, B. Parker, S. Reynolds, A. Babakhani, S. Yaldiz, L. Pileggi, R. Harjani, J. Tierno, and D. Friedman, "21.8–27.5GHz PLL in 32nm SOI using Gm linearization to achieve −130dBc/Hz phase noise at 10MHz offset from a 22GHz carrier," IEEE Radio Frequency Integrated Circuits Symposium (RFIC), June 2012, pp. 75-78.
  61. M. Ferriss, J. -O. Plouchart, A. Natarajan, A. Rylyakov, B. Parker, A. Babakhani, S. Yaldiz, B. Sadhu, A. Valdes-Garcia, J. Tierno, and D. Friedman, "An integral path self-calibration scheme for a 20.1–26.7GHz dual-loop PLL in 32nm SOI CMOS," IEEE VLSI Circuits Symposium, June 2012, pp. 176-177.
  62. A. Natarajan, M. Piz, A. Valdes-Garcia, and S. Reynolds, “Phased-array Radar and Multistatic Array Imaging with 16-element 60GHz SiGe Tx and Rx,” Government Microcircuits Applications and Critical Technology Conference (GOMAC), Mar. 2012.
  63. S. Yaldiz, V. Calayir, X. Li, L. Pileggi, A. Natarajan, M. A. Ferriss, and J. Tierno, “Indirect Phase Noise Sensing for Self-Healing Voltage Controlled Oscillators,” IEEE Custom Integrated Circuits Conference, Mar. 2011.
  64. D. G. Kam, D. Liu, A. Natarajan, S. Reynolds, and B. Floyd, “Low-cost Antenna-in-package Solutions for 60-GHz Phased-Array Systems,” IEEE Electrical Performance of Electronic Packages and Systems Conference (EPEPS), Oct. 2010, pp. 93-96.
  65. S. Reynolds, A. Natarajan, M.-D. Tsai, S. Nicolson, J.-H. Zhan, D. Liu, D. G. Kam, O. Huang, A. Valdes-Garcia, and B. Floyd, “A 16-element phased-array receiver IC for 60-GHz communications in SiGe BiCMOS,” IEEE Radio Frequency Integrated Circuits Conference (RFIC), May 2010, pp. 461-464.
  66. A. Valdes-Garcia, S. Nicolson, Jie-Wei Lai, A. Natarajan, Ping-Yu Chen, S. Reynolds, J.-H.C. Zhan, and B. Floyd, “A SiGe BiCMOS 16-element phased-array transmitter for 60GHz communications,” IEEE Solid-State Circuits Conference (ISSCC), Feb. 2010, pp. 218-219.
  67. A. Natarajan, M.-D. Tsai, and B. Floyd, “60GHz RF-path phase-shifting two-element phased-array front-end in Silicon,” IEEE Symposium on VLSI Circuits, June 2009, pp. 250-251.
  68. M.-D. Tsai and A. Natarajan, “60GHz passive and active RF-path phase shifters in silicon,” IEEE Radio Frequency Integrated Circuits Symposium (RFIC), June 2009, pp. 223-226.
  69. A. Natarajan, S. Nicolson, M.-D. Tsai, and B. Floyd, “A 60GHz variable-gain LNA in 65nm CMOS,” IEEE Asian Solid-State Circuits Conference (ASSCC), Nov. 2008, pp. 117-120.
  70. F. Bohn, H. Wang, A. Natarajan, S. Jeon, and A. Hajimiri, “Fully integrated frequency and phase generation for a 6–18GHz tunable multi-band phased-array receiver in CMOS,” IEEE Radio Frequency Integrated Circuits Symposium (RFIC), June 2008, pp. 439-442.
  71. H. Wang, S. Jeon, Y.-J. Wang, F. Bohn, A. Natarajan, A. Babakhani, and A. Hajimiri, “A tunable concurrent 6-to-18GHz Phased-array system in CMOS,” IEEE Microwave Symposium Digest, June 2008, pp. 687-690.
  72. S. Jeon, Y.-J. Wang, H. Wang, F. Bohn, A. Natarajan, A. Babakhani, and A. Hajimiri, “A Scalable 6-to-18GHz Concurrent Dual-Band Quad-Beam Phased-Array Receiver in CMOS,” IEEE Solid-State Circuits Conference (ISSCC), Feb. 2008, pp. 186-605.
  73. A. Natarajan, B. Floyd, and A. Hajimiri, “A Bidirectional RF-Combining 60GHz Phased-Array Front-End,” IEEE International Solid-State Circuits Conference (ISSCC), Feb. 2007, pp. 202-203.
  74. A. Babakhani, X. Guan, A. Komijani, A. Natarajan, and A. Hajimiri, “A 77GHz 4-Element Phased Array Receiver with On-Chip Dipole Antennas in Silicon,” IEEE Solid-State Circuits Conference (ISSCC), Feb. 2006, pp. 629-630.
  75. A. Natarajan, A. Komijani, X. Guan, A. Babakhani, Y. Wang, and A. Hajimiri, “A 77GHz PhasedArray Transmitter with Local LO-Path Phase-Shifting in Silicon,” IEEE Solid-State Circuits Conference (ISSCC), Feb. 2006, pp. 639-640.
  76. A. Natarajan, A. Komijani, and A. Hajimiri, “A 24 GHz phased-array transmitter in 0.18µm CMOS,” IEEE Design Automation Conference (DAC), June 2005, pp. 551- 552. [invited]
  77. A. Natarajan, A. Komijani, and A. Hajimiri, “A 24 GHz phased-array transmitter in 0.18µm CMOS,” IEEE International Solid-State Circuits Conference (ISSCC), Feb. 2005, pp. 212-213.

Book Chapter:

  1. B. Floyd and A. Natarajan, “System-on-a-chip mm-wave silicon transmitters, “ in mm-Wave Silicon Power Amplifiers and Transmitters, Cambridge University Press
  2. S. Reynolds, A. Valdes-Garcia, B. Floyd, Y. Katayama, and A. Natarajan, “Millimeter-Wave System Overview”, from Millimeter-Wave Antennas, Packaging and Beyond, Wiley, Chapter 16, 2009.