Oregon State High-Speed Integrated Circuits Lab


Journal Publications:
  1. R. Garg and A. Natarajan, "A 28-GHz Low-Power Phase-Array Receive Front-End with 360 RTPS Phase-Shift Range," submitted to IEEE Transactions of Microwave Theory and Techniques
  2. A. Agrawal, and A. Natarajan, “Series Resonator Mode-Switching for Area-Efficient Octave Tuning-Range CMOS LC Oscillators,” accepted (with revisions), IEEE Transactions on Microwave Theory and Techniques.
  3. L. Zhang, A. Natarajan, H. Krishnaswamy, “Scalable Spatial Notch Suppression in Spatio-Spectral-Filtering MIMO Receiver Arrays for Digital Beamforming,” recommended for publication (with revisions), IEEE Journal of Solid-State Circuits.
  4. 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.
  5. Y. Liu, A. Agrawal, and A. Natarajan, “Millimeter-wave IC-Antenna Cointegration for Integrated Transmitters and Receivers,” IEEE Antennas and Wireless Propagation Letters, Mar. 2016
  6. 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
  7. A. Natarajan, A. Valdes-Garcia, B. Sadhu, S. Reynolds, 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
  8. J. Cheng, N. Qi, P. Chiang, 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
  9. 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
  10. 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.
  11. 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.
  12. 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.

  13. Pre-Oregon State University:

  14. 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.
  15. 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. A. 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.
  16. 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.
  17. 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.
  18. 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.
  19. 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.
  20. A. Babakhani, X. Guan, A. Komijani, A. Natarajan, 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.
  21. 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.
  22. 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.
  23. 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.
  24. 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.
  25. 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. Agrawal and A. Natarajan, “A 0.3 GHz to 1.4 GHz N-path Mixer-based Code-Domain RX with TX Self-Interference Rejection”, to appear in IEEE RFIC 2017
  2. 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,” to appear in IEEE RFIC 2017
  3. A. Agrawal and A. Natarajan, “A Concurrent Dual-Frequency/Angle-of-Incidence Spatio-spectral Notch Filter using Walsh Function Passive Sequence Mixers,” to appear in IEEE IMS 2017
  4. 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,” to appear in IMS 2017
  5. 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,” to appear in IMS 2017
  6. 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,” to appear in IEEE Intl. Solid-State Circuits Conf. (ISSCC), Feb. 2017.
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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)
  16. 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
  17. 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.
  18. 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.
  19. 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.
  20. 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.
  21. 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
  22. 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.
  23. 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.

  24. Pre-Oregon State University:

  25. 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.
  26. 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.
  27. 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.
  28. 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.
  29. 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.
  30. 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.
  31. 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.
  32. 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.
  33. 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.
  34. 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.
  35. 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.
  36. 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.
  37. 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.
  38. 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.
  39. 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.
  40. 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.
  41. 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]
  42. 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. 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.