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Waleed Khalil

  • Associate Professor, Electrical & Computer Engr.
  • 205 Dreese Laboratories
    2015 Neil Ave
    Columbus, OH 43210
  • 614-292-0305

About

Dr. Khalil received his B.S.E.E. and M.S.E.E degrees from the University of Minnesota in 1992 and 1993, respectively, and his Ph.D. degree from Arizona State University in 2008. He is currently serving as an Associate Professor at the ECE department and the ElectroScience Lab, The Ohio State University. He is a founder of CLASS (Circuit Laboratory for Advanced Sensors and Systems) at OSU where he conducts research in digital intensive RF and mm-wave circuits and systems, high performance clocking circuits, GHz A/D and D/A circuits. Prior to joining OSU, Dr. Khalil spent 16 years at Intel Corporation where he held various technical and leadership positions in wireless and wireline communication groups. While at Intel, he was appointed the lead engineer at the advanced wireless communications group, where he played an instrumental role in the development of the industry's first Analog Front-end IC for third generation radios (3G). He established Intel's first analog device modeling methodology for mixed signal circuit design and also contributed to the development of Intel's first RF process technology. He later co-founded a startup group to develop Intel's first RF front-end IC, as a principle leader of the radio transmitter chain. He authored and co-authored 11 issued and several other pending patents, over 50 journal and conference papers and three book/book chapters. Dr. Khalil is a senior member in IEEE and serves in the steering committee for the RFIC Symposium and the technical program committee for the Compound Semiconductor IC Symposium (CSICS). 

Honors

  • January, 2020

    Best poster award at the 2020 Government Microcircuit Applications & Critical Technology (GOMACTech) Conference.

  • February, 2019

    Analog Devices Outstanding Student Designer Award, 2019.

  • January, 2019

    OSU College of Engineering Lumley Research Award.

  • January, 2018

    SEta Kappa Nu Fred H. Pumphrey's Distinguished Teacher Award in Electrical Engineering.

  • January, 2017

    Best paper award at the 2017 IEEE Compound Semiconductor IC Symposium (CSICS).

  • January, 2017

    Best student paper award at the 2017 IEEE Compound Semiconductor IC Symposium (CSICS).

  • January, 2014

    2nd place best paper competition at 2014 USNC/URSI National Radio Science Conference.

  • January, 2013

    Best paper award at the 2013 IEEE International Symposium on Phased Array Systems and Technology.

  • January, 2013

    Best paper award at the 2013 Wireless Innovation Forum.

  • June, 2011-
    September, 2012

    AFRL Summer Faculty Fellowship.

  • June, 2010-
    September, 2011

    AFRL Summer Faculty Fellowship.

  • May, 2010

    TSMC's Outstanding Circuit Research Award.

  • January, 2010

    Professional Course Instructor.

  • June, 2005

    Intel Achievement Award.

  • January, 1996-
    January, 2004

    Intel Division Recognition Award.

  • January, 1992-
    January, 1993

    University of Minnesota Dean's List.

Books

2011

  • Yoder, Samantha; Ismail, Mohammed; Khalil, Waleed. 2011. "VCO-based quantizers using frequency-to-digital and time-to-digital converters." Springer.

Chapters

2012

  • 2012. "Current and Emerging Trends in the Design of Digital-to-Analog Converters." In Design, Modeling and Testing of Data Converters, edited by P. Carbone, S. Kiaei, T. F. Xu,

2006

  • Khalil, W.; Bakkaloglu, B.. 2006. "Challenges in the design of PLLs in deep-submicron technology."

Journal Articles

2019

  • Fragasse, R.; Tantawy, R.; Dupaix, B.; Dean, T. et al., 2019, "Analysis of SRAM Enhancements Through Sense Amplifier Capacitive Offset Correction and Replica Self-Timing." IEEE Transactions on Circuits and Systems I: Regular Papers 66, no. 6, 2037-2050 - 2037-2050.
  • Tantawy, R.; Patel, V.J.; Smith, D.S.; Rashid, S. et al., 2019, "Wide-Bandwidth, High-Linearity, 2.8-GS/s, 10-bit Accurate Sample and Hold Amplifier in 130-nm SiGe BiCMOS." IEEE Transactions on Circuits and Systems I: Regular Papers 66, no. 5, 1758-1768 - 1758-1768.
  • Fragasse, R.; Tantawy, R.; Dupaix, B.; Dean, T. et al., 2019, "Analysis of SRAM enhancements through sense amplifier capacitive offset correction and replica self-timing." IEEE Transactions on Circuits and Systems I: Regular Papers 66, no. 6, 2037-2050 - 2037-2050.

2018

  • Mathieu, B.L.; McCue, J.J.; Duncan, L.; Dupaix, B. et al., 2018, "A Capacitively Coupled, Pseudo Return-to-Zero Input, Latched-Bias Data Receiver." IEEE Journal of Solid-State Circuits 53, no. 9, 2500-2511 - 2500-2511.

2017

  • McDonnell, S.M.; Patel, V.J.; Duncan, L.; Dupaix, B. et al., 2017, "Compensation and Calibration Techniques for Current-Steering DACs." IEEE Circuits and Systems Magazine 17, no. 2, 4-26 - 4-26.
  • Duncan, L.; Dupaix, B.; McCue, J.J.; Mathieu, B. et al., 2017, "A 10-bit DC-20-GHz Multiple-Return-to-Zero DAC With >48-dB SFDR." IEEE Journal of Solid-State Circuits 52, no. 12, 3262-3275 - 3262-3275.
  • Ouda, M.H.; Khalil, W.; Salama, K.N., 2017, "Self-Biased Differential Rectifier with Enhanced Dynamic Range for Wireless Powering." IEEE Transactions on Circuits and Systems II: Express Briefs 64, no. 5, 515-519 - 515-519.

2016

  • McCue, J.J.; Dupaix, B.; Duncan, L.; Mathieu, B. et al., 2016, "A Time-Interleaved Multimode RF-DAC for Direct Digital-to-RF Synthesis." IEEE Journal of Solid-State Circuits 51, no. 5, 1109-1124 - 1109-1124.
  • Ouda, M.H.; Khalil, W.; Salama, K.N., 2016, "Wide-Range Adaptive RF-to-DC Power Converter for UHF RFIDs." IEEE Microwave and Wireless Components Letters 26, no. 8, 634-636 - 634-636.
  • Elabd, S.; Khalil, W., 2016, "Impact of technology scaling on the tuning range and phase noise of mm-wave CMOS LC-VCOs." Integration, the VLSI Journal 52, 195-207 - 195-207.

2015

  • Alwan, E.A.; Venkatakrishnan, S.B.; Akhiyat, A.A.; Khalil, W. et al., 2015, "Phase Error Evaluation in a Two-Path Receiver Front-End With On-Site Coding." IEEE Access 3, 55-63 - 55-63.
  • Alwan, E.A.; Venkatakrishnan, S.B.; Akhiyat, A.A.; Khalil, W. et al., 2015, "Code Optimization for a Code-Modulated RF Front End." IEEE Access 3, 260-273 - 260-273.

2014

  • Alwan, E.A.; Akhiyat, A.A.; Khalil, W.; Volakis, J.L., 2014, "Analytical and experimental evaluation of a novel wideband digital beamformer with on-site coding." Journal of Electromagnetic Waves and Applications 28, no. 12, 1401-1429 - 1401-1429.
  • Elabd, S.; Balasubramanian, S.; Wu, Q.; Quach, T. et al., 2014, "Analytical and Experimental Study of Wide Tuning Range mm-Wave CMOS LC-VCOs." IEEE Transactions on Circuits and Systems I: Regular Papers 61, no. 5, 1343-1354 - 1343-1354.
  • Alwan, E.A.; Balasubramanian, S.; Atallah, J.G.; LaRue, M. et al., 2014, "Coding-based ultra-wideband digital beamformer with significant hardware reduction." Analog Integrated Circuits and Signal Processing 78, no. 3, 691-703 - 691-703.

2013

  • Balasubramanian, S.; Khalil, W., 2013, "Architectural trends in current-steering digital-to-analog converters." Analog Integrated Circuits and Signal Processing 77, no. 1, 55-67 - 55-67.
  • Wu, Q.; Quach, T.K.; Mattamana, A.; Elabd, S. et al., 2013, "Frequency Tuning Range Extension in LC-VCOs Using Negative-Capacitance Circuits." IEEE Transactions on Circuits and Systems II: Express Briefs 60, no. 4, 182-186 - 182-186.

2012

  • Balasubramanian, S.; Boumaiza, S.; Sarbishaei, H.; Quach, T. et al., 2012, "Ultimate Transmission." IEEE Microwave Magazine 13, no. 1, 64-82 - 64-82.

2011

  • Khalil, W.; Shashidharan, S.; Copani, T.; Chakraborty, S. et al., 2011, "A ${\hbox{700-}}\mu{\hbox {A}}$ 405-MHz All-Digital Fractional-$N$ Frequency-Locked Loop for ISM Band Applications." IEEE Transactions on Microwave Theory and Techniques 59, no. 5, 1319-1326 - 1319-1326.
  • Balasubramanian, S.; Creech, G.; Wilson, J.; Yoder, S.M. et al., 2011, "Systematic Analysis of Interleaved Digital-to-Analog Converters." IEEE Transactions on Circuits and Systems II: Express Briefs 58, no. 12, 882-886 - 882-886.

2010

  • Balasubramanian, S.; Khalil, W., 2010, "Direct digital-to-RF digital-to-analogue converter using image replica and nonlinearity cancelling architecture." Electronics Letters 46, no. 14, 1030-1030 - 1030-1030.
  • Moulder, W.F.; Khalil, W.; Volakis, J.L., 2010, "60-GHz Two-Dimensionally Scanning Array Employing Wideband Planar Switched Beam Network." IEEE Antennas and Wireless Propagation Letters 9, 818-821 - 818-821.
  • Hedayati,Hiva; Khalil,Waleed; Bakkaloglu,Bertan, 2010, "A 1 MHz Bandwidth, 6 GHz 0.18 mu m CMOS Type-I Delta Sigma Fractional-N Synthesizer for WiMAX Applications (vol 44, pg 3244, 2009)." IEEE JOURNAL OF SOLID-STATE CIRCUITS 45, no. 6, 1256-1256 - 1256-1256.

2007

  • Khalil, W.; Bakkaloglu, B.; Kiaei, S., 2007, "A Self-Calibrated On-Chip Phase-Noise Measurement Circuit With $-$75 dBc Single-Tone Sensitivity at 100 kHz Offset." IEEE Journal of Solid-State Circuits 42, no. 12, 2758-2765 - 2758-2765.

2006

  • Hedayati, H.; Bakkaloglu, B.; Khalil, W., 2006, "Closed-Loop Nonlinear Modeling of Wideband$SigmaDelta$Fractional-$N$Frequency Synthesizers." IEEE Transactions on Microwave Theory and Techniques 54, no. 10, 3654-3663 - 3654-3663.

2003

  • Khalil, W.; Tsung-Yuan Chang, ; Xuewen Jiang, ; Naqvi, S.R. et al., 2003, "A highly integrated analog front-end for 3g." IEEE Journal of Solid-State Circuits 38, no. 5, 774-781 - 774-781.

1992

  • Liu, Y.; Khalil, W.; Fischer, P.B.; Chou, S.Y. et al., 1992, "Nanoscale ultrafast metal-semiconductor-metal photodetectors." IEEE Transactions on Electron Devices 39, no. 11, 2674-2675 - 2674-2675.
  • Chou, S.Y.; Liu, Y.; Khalil, W.; Hsiang, T.Y. et al., 1992, "Ultrafast nanoscale metal‐semiconductor‐metal photodetectors on bulk and low‐temperature grown GaAs." Applied Physics Letters 61, no. 7, 819-821 - 819-821.

Unknown

  • Rahman, M.T.; Rahman, M.S.; Wang, H.; Tajik, S. et al., "Defense-in-Depth: A Recipe for Logic Locking to Prevail."

Presentations

  • "Workshop: Volumetric Switched Beam Array for 60 GHz Wireless Systems." 2010, Presented at IEEE MTT International Microwave Symposium (IMS),
  • "Ultra Wideband Direct Digital-to-RF D/A Architecture and Circuits." 2010, Presented at IEEE Dallas Circuits and Systems (DCAS),
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2010, Presented at ElectroScience Lab Consortium for EM and RF (CERF),
  • "Short Course: Millimeter Wave Circuits: Embracing The Next Wave of Wireless Communication." 2010, Presented at Radio and Mixed Signal Integrated Systems (RAMSIS) 6th Summer School,
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2011, Presented at ElectroScience Lab Consortium for EM and RF (CERF),
  • "Invited Talk: VCO Design Challenges And Solutions For Mm-Wave Applications." 2019, Presented at IEEE Circuits and Systems Society (CASS) Santa Clara Valley Section, Santa Clara, California,,
  • "Invited Talk: Process Specific Functions for Assurance of Analog-Mixed-Signal Integrated Circuits." 2018, Presented at IEEE International Test Conference (ITC),
  • "Short Course: Fundamentals of Radio Systems." 2018, Presented at Harris Corporation Invited Course,
  • "Short Course: The Radio Modem: RF Transceiver From Antenna to Bits and Back." 2020, Presented at Besser Associates Short Course,
  • "Short Course: Fundamentals of RF Radio Systems." 2019, Presented at Lockheed Martin Invited Course,
  • "Short Course: Analysis and Design of High Performance PLLs and Frequency Synthesizers." 2019, Presented at Lockheed Martin Invited Course,
  • "Short Course: The Radio Modem: RF Transceiver From Antenna to Bits and Back." 2018, Presented at Besser Associates Short Course,
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2018, Presented at Besser Associates Short Course,
  • "Short Course: Introduction to Si RF & Mixed Signal IC Design." 2017, Presented at IEEE Compound Semiconductor IC Symposium (CSICS),
  • "Short Course: The Radio Modem: RF Transceiver From Antenna to Bits and Back." 2017, Presented at Besser Associates Short Course,
  • "Short Course: Analysis and Design of mm-Wave VCOs in CMOS and Bipolar Technologies." 2017, Presented at ElectroScience Lab Consortium on Electromagnetics and Radio Frequencies (CERF),
  • "Short Course: Wideband PLLs and Digital Frequency Synthesis: Challenges and Solutions." 2016, Presented at ElectroScience Lab Consortium on Electromagnetics and Radio Frequencies (CERF),
  • "Short Course: Wideband PLLs and Frac-N Synthesizers for SDRs; Challenges and Solutions." 2015, Presented at ElectroScience Lab Consortium on Electromagnetics and Radio Frequencies (CERF),
  • "Short Course: RFIC Architectures and Design for Radar and Communication Systems." 2014, Presented at ElectroScience Lab Consortium on Electromagnetics and Radio Frequencies (CERF),
  • "Short Course: High Performance Digital to Analog Converters: Challenges and Solutions." 2017, Presented at ElectroScience Lab Consortium on Electromagnetics and Radio Frequencies (CERF),
  • "Workshop Invited Speaker: The Insider Guide to Designing mm-Wave Silicon VCOs." 2017, Presented at IEEE RFIC Symposium,
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2017, Presented at Besser Associates Short Course,
  • "Short Course: The Radio Modem: RF Transceiver From Antenna to Bits and Back." 2016, Presented at Besser Associates Short Course,
  • "Short Course: Introduction to Si RFIC Design." 2016, Presented at IEEE Compound Semiconductor IC Symposium (CSICS),
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2016, Presented at Besser Associates Short Course,
  • "Short Course: Introduction to Si RFIC Design." 2015, Presented at IEEE Compound Semiconductor IC Symposium (CSICS),
  • "Short Course: The Radio Modem: RF Transceiver From Antenna to Bits and Back." 2015, Presented at Besser Associates Short Course,
  • "Short Course: Wideband PLLs and Frac-N Synthesizers for SDRs: Challenges and Solutions." 2015, Presented at Air Force Research Lab Invited Course,
  • "Short Course: Wireless Design: An End to End Systems' Perspective." 2015, Presented at Vigilant Global Invited Course,
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2015, Presented at Besser Associates Short Course,
  • "Short Course: Characterization and Measurement of Phase Noise and Jitter." 2014, Presented at Besser Associates Short Course,
  • "Workshop Invited Speaker: To HBT or Not HBT? Why CMOS Cannot Do it Alone!!." 2014, Presented at DARPA MTO Workshop,
  • "Short Course: Introduction to Si RFIC Design." 2014, Presented at IEEE Compound Semiconductor IC Symposium (CSICS),
  • "Short Course: RF Wireless System Design Fundamentals." 2014, Presented at Ericsson Invited Short Course,
  • "Invited Talk: Challenges and Roadmap to Ultra Wideband and Low Phase Noise mm-wave VCOs." 2014, Presented at CMOS Emerging Technologies Research,
  • "Invited Talk: Towards the Design of Robust Wide Tuning Range & Low Phase Noise mm-Wave VCOs: Challenges, Solutions and Recent Advances." 2014, Presented at University of Pierre and Marie Curie, Paris, France,
  • "Invited Talk: Towards the Design of Robust Wide Tuning Range and Low Phase Noise mm-Wave VCOs." 2014, Presented at University of Southern California, Los Angeles, CA,
  • "Invited Talk: Towards Ultra Wide Tuning Range and Low Phase Noise mm-Wave VCOs: A Negative Capacitance and BiCMOS Perspective." 2013, Presented at IEEE MTT Local Chapter, Washington DC,
  • "Plenary Talk: Toward Millimeter-Wave DACs: Challenges and Opportunities." 2012, Presented at IEEE Compound Semiconductor IC Symposium (CSICS),
  • "Invited Talk: Towards mm-Wave Design in Nanometer CMOS: Challenges and Solutions." 2012, Presented at University of Calgary, Calgary, Canada,
  • "Invited Talk: Negative Capacitance Circuits and Their Applications to ESD and Parasitic Capacitance Cancellation in High Speed IO Cells." 2010, Presented at Intel Research Labs, Hillsboro, Oregon,
  • "Short Course: Recent Advances in The Design of Wideband PLLs." 2009, Presented at Swedish Royal Inst. Of Technology (KTH) RAMSIS Summer School, Cairo, Egypt,
  • "Invited Talk: An On-Chip Phase Noise Analyzer." 2009, Presented at IBM Research Center, Yorktown Heights, New York,
  • "Short Course:Wideband Frequency Synthesizers." 2008, Presented at Swedish Royal Inst. Of Technology (KTH) RAMSIS Summer School, Stockholm, Sweden,
  • "Workshop Invited Speaker: Accurate Tuning and Calibration of Fractional-N Frequency Synthesizers." 2008, Presented at IEEE RFIC Symposium,
  • "Short Course: Frequency Synthesis for Wireless Systems." 2007, Presented at Swedish Royal Inst. Of Technology (KTH) RAMSIS Summer School, Gammarth, Tunisia,
  • "Tutorial Invited Speaker: RFIC Circuit and System Design." 2007, Presented at IEEE RFIC Symposium,
  • "Short Course: RF CMOS Design Solutions for 4G Wireless." 2006, Presented at Swedish Royal Inst. Of Technology (KTH) RAMSIS Summer School, Malaga, Spain,
  • "Invited Talk: Analysis of Phase Noise and Its Impact on RF Systems." 2005, Presented at IEEE International Conference on Electronics Circuits ad Systems, ICECS,
  • "Short Course: Introduction to Wireless Radio Communications." 2004, Presented at Swedish Royal Inst. Of Technology (KTH) RAMSIS Summer School, Beirut, Lebanon,

Papers in Proceedings

2019

  • Dean, T.; Quach, T.; Rashid, S.; James, T. et al. "Wideband High-Efficiency Reconfigurable Digital Power Amplifier in GaN." in Government Microcircuit Applications Conference (GOMAC). (3 2019).
  • Tantawy, R.; Patel, V.J.; Smith, D.S.; Rashid, S.M.S. et al. "Wide-Bandwidth, High-Linearity, 2.8-GS/s, 10-bit Accurate Sample and Hold Amplifier in 130-nm SiGe BiCMOS." (5 2019).
  • Belz, M.; Kines, M.; Rashid, S.; Smith, D. et al. "Optimal Component Selection for mm-Wave VCOs using Evolutionary Algorithms." in Government Microcircuit Applications Conference (GOMAC). (3 2019).
  • Specht, T.; Taghipour, Z.; Ronningen, T.J.; Fragasse, R. et al. "Photodetector architecture for open circuit voltage operation of MWIR InAsSb detectors." (8 2019).
  • Casto, M.; Dupaix, B.; Orlando, P.L.; Khalil, W. "Process Specific Functions for Assurance of Analog/Mixed-Signal Integrated Circuits." (8 2019).
  • Specht, T.; Taghipour, Z.; Ronningen, T.J.; Fragasse, R. et al. "Novel photodetector design using open circuit voltage for mid-wave infrared imagers." (1 2019).

2018

  • Abdelfattah, M.; Swilam, M.; Dupaix, B.; Smith, S. et al. "An on-chip resonant-gate-drive switched-capacitor converter for near-threshold computing achieving 70.2% efficiency at 0.92A/mm2current density and 0.4V output." (3 2018).
  • Fragasse, R.; Dupaix, B.; Tantawy, R.; James, T. et al. "Sense Amplifier Offset Cancellation and Replica Timing Calibration for High-Speed SRAMs." in 9th IEEE Latin American Symposium on Circuits and Systems (LASCAS). (1 2018).
  • Tantawy, R.; Patel, V.J.; Smith, D.S.; Casto, M. et al. "A High Linearity, 2.8 GS/s, 10-bit Accurate, Sample and Hold Amplifier in 130 nm SiGe BiCMOS." (4 2018).
  • Alzahrani, S.; Elabd, S.; Khalil, W. "A Wide Tuning Range Millimeter Wave CMOS LCVCO with Linearized Coarse Tuning Characteristics." (12 2018).
  • Larue, M.; Barton, T.; Belz, M.; Rashid, S. et al. "Multifunction Transmitter based on a Fully-Digital CMOS/GaN Architecture in DAHI Technology." in Government Microcircuit Applications Conference (GOMAC). (3 2018).
  • Naguib, A.; Tawfik, E.; Smith, D.; Dupaix, B. et al. "High Resolution Wide Bandwidth Integrated Arbitrary Amplitude and Phase Waveform Generator." in Government Microcircuit Applications Conference (GOMAC). (3 2018).

2017

  • Quach, T.; Watson, P.; Dupaix, B.; Barton, T. et al. "Wideband high-efficiency digital power amplifier in GaN." (12 2017).
  • Mathieu, B.; McCue, J.J.; Dupaix, B.; Patel, V.J. et al. "An AC coupled 10 Gb/s LVDS-compatible receiver with latched data biasing in 130 nm SiGe BiCMOS." (12 2017).
  • Larue, M.; Dupaix, B.; Rashid, S.; Barton, T. et al. "A fully-integrated S/C band transmitter in 45nm CMOS/0.2gm GaN heterogeneous technology." (12 2017).
  • Swilam, M.; Naguib, A.; Dupaix, B.; Khalil, W. et al. "A calibration-free low-power supply-pushing reduction circuit (SPRC) for LC VCOs." (9 2017).
  • Duncan, L.; Dupaix, B.; McCue, J.; Mathieu, B. et al. "A 10b DC-to-20GHz multiple-return-to-zero DAC with >48dB SFDR." (3 2017).

2016

  • Rashid, S.; Dupaix, B.; Watson, P.; Gaber, W. et al. "A Wide-Band Complementary Digital Driver for Pulse Modulated Single-Ended and Differential S/C Bands Class-E PAs in 130 nm GaAs Technology." (11 2016).
  • Mattamana, A.; Gouty, W.; Khalil, W.; Watson, P. et al. "Multi-Octave and Frequency-Agile LNAs Covering S-C Band Using 0.25 μm GaN Technology." (11 2016).
  • Alwan, E.A.; Papantonis, D.; Novak, M.; Akhiyat, A.A. et al. "Reduced-power millimeter-wave reconfigurable systems." (5 2016).

2015

  • Venkatakrishnan, S.B.; Akhiyat, A.A.; Alwan, E.A.; Khalil, W. et al. "Phase characterization of an 8-channel on-site coding receiver for digital beamforming." (10 2015).
  • McCue, J.J.; Dupaix, B.; Duncan, L.; Patel, V.J. et al. "A time-interleaved multi-mode ΔΣ RF-DAC for direct digital-to-RF synthesis." (11 2015).
  • Watt, S.J.; Alwan, E.A.; Khalil, W.; Volakis, J.L. "Wideband self-interference cancellation filter for Simultaneous Transmit and Receive systems." (10 2015).
  • Scherer, K.L.; Watt, S.J.; Alwan, E.A.; Akhiyat, A.A. et al. "Simultaneous transmit and receive system architecture with four stages of cancellation." (10 2015).
  • Venkatakrishnan, S.B.; Akhiyat, A.A.; Alwan, E.A.; Khalil, W. et al. "Angle of arrival estimation across a 10:1 bandwidth architecture using on-site coding receiver." (10 2015).
  • Abdelfattah, M.; Dupaix, B.; Naqvi, S.; Khalil, W. "A fully-integrated switched capacitor voltage regulator for near-threshold applications." (1 2015).

2014

  • Alwan, E.A.; Khalil, W.; Volakis, J.L. "Analytical and experimental evaluation of a novel wideband transceiver with on-site coding." (1 2014).
  • McCue, J.J.; Casto, M.; Li, J.C.; Watson, P. et al. "An active double-balanced down-conversion mixer in InP/Si BICMOS operating from 70-110 GHz." (1 2014).
  • Venkatakrishnan, S.B.; Akhiyat, A.; Alwan, E.A.; Khalil, W. et al. "Realization of a novel on-site coding digital beamformer using FPGAs." (1 2014).
  • Abdelfattah, M.; Naqvi, S.; Dupaix, B.; Khalil, W. "Tracking energy efficiency of near-threshold design using process variation control techniques." (1 2014).
  • Volakis, J.L.; Alwan, E.A.; Papantonis, D.; Khalil, W. "Ultra-wideband conformal apertures with digital beamforming for UHF to millimeter-wave applications." (1 2014).
  • Alwan, E.A.; Akhiyat, A.; Khalil, W.; Volakis, J.L. "Phase characterization of a 2-path on-site coding digital beamformer." (1 2014).
  • Khalil, W.; McCue, J.; Dupaix, B.; Gaber, W. et al. "On the design of RF-DACs for random acquisition based reconfigurable receivers." (1 2014).
  • Liang, Y.; Eliezer, O.; Islam, Z.; Rajan, D. et al. "Interference-robustness improvement in BPSK receivers for the enhanced WWVB broadcast." (1 2014).

2013

  • Liang, Y.; Rajan, D.; Eliezer, O.; Balasubramanian, S. et al. "A new broadcast format and receiver architecture for radio controlled clocks." (12 2013).
  • Wu, Q.; Elabd, S.; McCue, J.J.; Khalil, W. "Analytical and experimental study of tuning range limitation in mm-wave CMOS LC-VCOs." (9 2013).
  • Yoder, S.M.; Balasubramanian, S.; Khalil, W.; Patel, V.J. "Accuracy and speed limitations in DACs across CMOS process technologies." (12 2013).
  • Q. Wu, T. Quach, A. Mattamana, S. Elabd, S. R. Dooley, J. J. McCue, P. L. Orlando, G. Creech, W. Khalil "A 10mW 37.8GHz Current Redistribution BiCMOS VCO with an Average FOMT of -193.5dBc/Hz." in IEEE International Solid-State Circuits Conference (ISSCC). (2 2013).
  • Alwan, E.A.; Larue, M.; Khalil, W.; Volakis, J.L. "Experimental validation of a coding-based digital beamformer." (12 2013).
  • Alwan, E.A.; Khalil, W.; Volakis, J.L. "Ultra-wideband on-site coding receiver (OSCR) for digital beamforming applications." (12 2013).
  • Alwan, E.A.; Akhiyat, A.; Larue, M.; Khalil, W. et al. "Low cost, power efficient, on-site coding receiver (OSCR) for ultra-wideband digital beamforming." (12 2013).
  • E.A. Alwan, S. Balasubramanian,J. G. Atallah,M. Larue, W. Khalil, K. Sertel, J.L. Volakis "Ultra-wideband Digital Beamformer with Significant SWAP-C Reduction." in Wireless Innovation Forum (SDR 2013). (1 2013).
  • Wu, Q.; Elabd, S.; Quach, T.K.; Mattamana, A. et al. "A -189 dBc/Hz FOMT wide tuning range Ka-band VCO using tunable negative capacitance and inductance redistribution." (9 2013).

2012

  • Alwan, E.A.; Balasubramanian, S.; Atallah, J.G.; Larue, M.R. et al. "Coding-based transceiver for phased array with significant hardware reduction." (12 2012).
  • Wu, Q.; Quach, T.; Mattamana, A.; Elabd, S. et al. "Design of wide tuning-range mm-wave VCOs using negative capacitance." (12 2012).
  • Q. Wu, T. Quach, A. Mattamana, S. Soliman, S. Dooley, J. McCue, P. L. Orlando, G. Creech, W. Khalil "Negative Capacitance Circuits Design Considerations for Wide Tuning Range mm-Wave VCOs." in IEEE Compound Semiconductor IC Symposium (CSICS 2012). (10 2012).
  • W. Khalil, J. Wilson, B. Dupaix, S. Balasubramanian, G. Creech "(invited) Toward Millimeter-Wave DACs: Challenges and Opportunities." in Compound Semiconductor IC Symposium (CSICS 2012). (10 2012).
  • Elias Alwan, Kubilay Sertel, Waleed Khalil, and John L Volakis "Cost and Power Efficient Ultra-wideband Digital Beam-forming for Cognitive Sensing." in 2012 IEEE Antennas and Propagation Society/URSI Symposium. (8 2012).
  • Balasubramanian, S.; Khalil, W. "Architectural trends in GHz speed DACs." (12 2012).

2011

  • J. Lowe, M. Deutch, G. Nelson, D. Sutton, W. Yates, P. Hansen, O. Eliezer, T. Jung, S. Morrison, Y. Liang, D. Rajan, S. Balasubramanian, A. Ramasami, W. Khalil "New Improved System for WWVB Broadcast." in 43rd Annual Precise Time and Time Interval (PTTI) Meeting. (11 2011).
  • J. McCue, W. Khalil, L. Orlando, K. Groves, A. Mattamana, T. Quach and G. Creech "LNA Linearization at the Ka Band Using a .13µm SiGe Technology." in Government Microcircuit Applications Conference (GOMAC). (3 2011).
  • S. Yoder, W. Khalil, M. Ismail and G. Creech "Analysis and Modeling of Non-Idealities in VCO-Based Quantizers using Frequency-to-Digital and Time-to-Digital Converters." in Government Microcircuit Applications Conference (GOMAC). (3 2011).
  • J. McCue, S. Bou-Sleiman, L. Orlando, A. Mattamana, T. Quach, G. Creech, W. Khalil "Physical Modeling of a Parasitic Net Area Check (NAC) Tie-Down Diode for De-embedding." in 8th International Applied Computational Electromagnetics Society (ACES) Conference. (12 2011).

2010

  • Moulder, W.F.; Khalil, W.; Volakis, J.L. "60 GHz volumetric switched beam array." (6 2010).
  • Sleiman, S.B.; Akour, A.; Khalil, W.; Ismail, M. "Millimeter-wave BiST and BiSC using a high-definition sub-ranged detector in 90nm CMOS." (9 2010).
  • A. Akour, W. Khalil, J. Volakis, M. Ismail "A Compact Model for mm-Wave Tramission Lines and Interconnects on Lossy CMOS Substrates." in IEEE International Electronics, Circuits and Systems Conference (ICECS). (12 2010).
  • Hu, J.; Liu, W.; Khalil, W.; Ismail, M. "Increasing sleep-mode efficiency by reducing battery current using a DC-DC converter." (9 2010).
  • Shashidharan, S.; Khalil, W.; Chakraborty, S.; Kiaei, S. et al. "A 700uA, 405MHz fractional-N all digital frequency-locked loop for MICS band applications." (7 2010).
  • Akour, A.; Khalil, W.; Ismail, M. "Sub-THz high gain wide-band low noise amplifiers in 90nm RF CMOS technology." (12 2010).
  • Liu, W.; Khalil, W.; Ismail, M.; Kussener, E. "A resistor-free temperature-compensated CMOS current reference." (8 2010).

2009

  • H. Hedayati, W. Khalil, B. Bakkaloglu "A 1MHz-Bandwidth Type-I ΔΣ Fractional-N Synthesizer for WiMAX Applications." in IEEE International Solid-State Circuits Conference (ISSCC). (2 2009).
  • Abdelmoneum, M.; Browning, D.; Arabi, T.; Khalil, W. "Micro and Nano Electro Mechanical Systems (MEMS/NEMS) for mobile computing systems." (12 2009).

2008

  • W. Khalil, H. Hedayati, B. Bakkaloglu, S. Kiaei "(Invited) Analysis and Modeling of Noise Folding and Spurious Emission in Wideband ΣΔ Fractional-N Synthesizers." in IEEE Radio Frequency Integrated Circuits Symposium (RFIC). (6 2008).

2007

  • W. Khalil, B. Bakkaloglu, S. Kiaei "A Self-Calibrated, On-chip Phase Noise Measurement Circuit with -75dBc Single Tone Sensitivity at 100kHz Offset." in IEEE International Solid-State Circuits Conference (ISSCC). (2 2007).
  • Valdes-Garcia, A.; Khalil, W.; Bakkaloglu, B.; Silva-Martinez, J. et al. "Built-in self test of RF transceiver SoCs: From signal chain to RF synthesizers (invited)." (10 2007).

2003

  • Khalil, W.; Chang, T.Y.; Jiang, X.; Naqvi, S.R. et al. "Fully integrated AFE for WCDMA." (12 2003).

2002

  • Liu, Y.; Khalil, W.; Fischer, P.B.; Chou, S.Y. et al. "Nanoscale Ultrafast Metal-Semiconductor-Metal Photodetectors." in IEEE Device Research Conference. (8 2002).
  • T. Chang, X. Jiang, W. Khalil, S. Naqvi, B. Nikjou, J. Tseng "Analog front end IC for 3G WCDMA." in IEEE Symposium on VLSI Circuits. (6 2002).

Patents

  • K. Glass, W. Khalil, B. McDaniel. "High speed, low power, current mode comparator." Patent number: 6008673
  • K. Glass, W. Khalil, B. McDaniel. "Ultra high speed, low power, flash A/D converter utilizing a current mode regenerative comparator." Patent number: 6037890
  • K. Glass, W. Khalil, B. McDaniel. "Electronic system with high speed, low power, A/D converter." Patent number: 6121913
  • W. Khalil, C. Shi, J. Wilson. "Multiplexed digital-to-analog converters used in communication devices." Patent number: 6621437
  • Afghahi,Morteza; Waleed,Khalil; Sami,Issa. "Amplifier assisted active pixel read out structure." Patent number: 6717616
  • Jiang,Xuewen; Nikjou,Bobby,B; Khalil,Waleed; Naqvi,Syed,R. "Differential digital-to-analog converter." Patent number: 6924761
  • T. Chang, W. Khalil, B. Nikjou. "Method and circuit to reduce intermodulation distortion." Patent number: 6975846
  • W. Khalil. "Voltage controlled oscillator apparatus, method, and system." Patent number: 7034623
  • W. Khalil, T. Chang, B. Nikjou. "Self-calibrating tunable filter." Patent number: 7050781
  • X. Jiang, B. Nikjou, W. Khalil, S. Naqvi. "Differential digital-to-analog converter." Patent number: 7242338
  • J. Tseng, W. Khalil, B. Nikjou, L. Johnson. "Programmable gain amplifier with self-adjusting offset correction." Patent number: 7302246
  • "Low Voltage Differential Signal Receiver with Fully Integrated AC Coupling and Bias Latching." Patent number: 9698735
  • "Wide-band Digital Buffer Driver." Patent number: 10411706
  • "Multi-function reconfigurable delta sigma DAC." Patent number: US9065472B1
  • "High-speed low-latency current-steering DAC." Patent number: US9184764B1