RF-THz Integrated Circuits

Our goal is to design and develop high-performance integrated circuits for instrumentation, communications, and sensing applications from RF to THz frequencies. We have expertise in SiGe, Si CMOS, GaAs, GaN, and InP processes. We focus our research on developing circuit techniques to achieve high linearity, high power, high efficiency, low noise and wide bandwidth. Additionally, we develop innovative design techniques that enable integrated circuits in emerging semiconductor processes to achieve unprecedented performance. Our current research topics include:

            •    Highly linear, high efficiency, and wide bandwidth power amplifiers
            •    Highly linear mixers and multipliers
            •    Low phase noise millimeter-wave oscillators

Research overview (pdf)
Related publications
  1. N. L. K. Nguyen, B. Nguyen, T. Omori, D. P. Nguyen, R. Moroney, S. D’Agostino, W. Kennan, and A. Pham, “A Wideband SiGe Power Amplifier Using Modified Triple Stacked-HBT Cell”, IEEE Microwave Wireless Components Letters, Vol. 31, Issue 1, pp. 52-55, December 2020.
  2. N. L.K. Nguyen, N. Killeen, D. P. Nguyen, A. N. Stameroff, and A. Pham, “A Wideband Gain Enhancement Technique for Distributed Amplifiers,” IEEE Transactions on Microwave Theory and Techniques, Vol. 68, Issue 9, pp. 3697 – 3708, 2020.
  3. D. Nguyen, N. L.K. Nguyen, A. Stameroff, V. Camarchia, M. Pirola, and A. Pham, “A Wideband Highly Linear Distributed Amplifier Using Intermodulation Cancellation Technique for Stacked-HBT Cell,” IEEE Transactions on Microwave Theory and Techniques, Vol. 68, Issue 7 Part 2,  pp. 2984 - 2997, 2020.
  4. N. L.K. Nguyen, D. Nguyen, A. Stameroff, and A. Pham, “A 1-160 GHz InP Distributed Amplifier Using 3-D Interdigital Capacitors,” IEEE Microwave Wireless Components Letters, Vol. 30, Issue 5, pp. 492-495, 2020.
  5. Thuy T Nguyen, Kohei Fujii, A. Pham, “A 4-20 GHz, Multi-Watt Level, Fully-Integrated Push-Pull Distributed Power Amplifier with Wideband Even-Order Harmonic Suppression,” IET Microwaves, Antennas & Propagation, Vol. 13, Issue 13, pp. 2279-2283, 2019.
  6. Duy P Nguyen, Binh L Pham, A. Pham, “A Compact Ka-Band Integrated Doherty Amplifier With Reconfigurable Input Network,” IEEE Transactions on Microwave Theory and Techniques, Vol. 67, Issue 1, pp. 205-215, January 2019.N. L.K. Nguyen, N. Killeen, D. P. Nguyen, A. N. Stameroff, and A. Pham, “A Wideband Gain Enhancement Technique for Distributed Amplifiers,” IEEE Transactions on Microwave Theory and Techniques, Vol. 68, Issue 9, pp. 3697 – 3708, 2020.
  7. Duy P Nguyen, Thanh Pham, A. Pham, “A 28-GHz Symmetrical Doherty Power Amplifier Using Stacked-FET Cells,” IEEE Transactions on Microwave Theory and Techniques, Vol. 66, Issue 6, pp. 2628-2637, June 2018.
  8. Duy P Nguyen, Jeffery Curtis, A. Pham, “A Doherty amplifier with modified load modulation scheme based on load–pull data,” IEEE Transactions on Microwave Theory and Techniques, Vol. 66, Issue 1, pp. 227-236, January 2018.
  9. Thuy T Nguyen, Kohei Fujii, A. Pham, “Highly Linear Distributed Mixer in 0.25-  Enhancement-Mode GaAs pHEMT Technology,” IEEE Microwave and Wireless Components Letter, Vol. 27, Issue 12, pp. 116-118, December 2017.
  10. Duy P Nguyen, Binh L Pham, A. Pham, “A 1.5–45-GHz High-Power 2-D Distributed Voltage-Controlled Attenuator,” IEEE Transactions on Microwave Theory and Techniques, Vol. 65, Issue 11, pp. 4208-4217, November 2017.