dr. S.M. Alavi

Assistant Professor
Electronic Circuits and Architectures (ELCA), Department of Microelectronics

PhD thesis (Jun 2014): All-Digital I/Q RF-DAC
Promotor: Bogdan Staszewski, Leo de Vreede

Expertise: RF Integrated Circuit

Themes: XG - Next Generation Sensing and Communication

Biography

Morteza S. Alavi was born in Tehran, Iran. He received the B.S.E.E and M.S.E.E degrees from the Iran University of Science and Technology and the University of Tehran in 2003 and 2006, respectively, and his Ph.D. in electrical engineering from the Delft University of Technology (TU-Delft), Delft, The Netherlands in 2014.

He was a Co-Founder and the CEO of DitIQ BV, Delft, a local company developing energy-efficient, wideband wireless transmitters for the next generation of the cellular network. Since September 2016, he has been with the Electronic Circuits and Architectures (ELCA) Research Group, TU-Delft, where he is currently a tenured Assistant Professor. His main areas of research interest are designing single-chip RFIC for wireless and cellular communication systems and CMOS wireline transceivers. He has co-authored Radio-Frequency Digital-to-Analog Converter (Elsevier, 2016).

He was the Best Paper Award recipient of the 2011 IEEE International Symposium on Radio-Frequency Integrated Technology (RFIT). He received the Best Student Paper Award (Second Place) at the 2013 Radio-Frequency Integrated Circuits (RFIC) Symposium. His Ph.D. student also won the Best Student Paper Award (First Place) of the 2017 RFIC Symposium held in Honolulu, HI, USA. His research group received the 2021 Institute of Semiconductor Engineers (ISE) President Best Paper Award of the International SoC Design Conference (ISOCC). 

One of his Ph.D. students also received the Platinum Award (first place) for Huawei student RFIC design content. Also, in 2021, one of his Ph.D. students was awarded the 2021-2022 IEEE SSCS Predoctoral Achievement award. 

 

EE1C11 Linear Circuits A

Circuit theory course for first year EE students, Part 1

EE1C21 Linear Circuits B

Circuit theory course for first year EE students, Part 2

EE4615 Digital IC design II

Designing digital CMOS circuit such as frequency dividers and time-to-digital (TDC) circuits

EE4C13 Wireless systems for electrical engineering applications

Commonly used RF electronics architectures in wireless systems, with the requirements on their building blocks.

ET4371 Mixed-mode wireless transceivers

Digital RF/Microwave System, Digital-Passive, All-digital RF synthesizers, transmitters and receivers

Education history

EE4600 Wireless Concepts and Systems

(not running) Basic concepts of RF design, such as noise, nonlinearity, Impedance Matching, Analog/Digital Modulation, Pulse-shaping, Mixer, Oscillator, Link-budget, Transmitter/Receiver Architectures

Digital tRAnSmitTer ICs

This project aims to develop DTX ICs for highly-integrated and energy-efficient mMIMO base stations.

Energy Efficient Radar TX

In the next years, advanced driver assistance systems (ADAS) are expected to transform cars into securely-connected self-driving robots with the capability of sensing the environment, thinking, and acting autonomously. CRUISE facilitates transforming to this near era.

Energy Efficient Wideband Transmitter, NXP Partnership ‘Advanced 5G Solutions’

This project providing enhanced average efficiency in wideband wireless transmitters while withstanding the changing load conditions that can occur in handheld devices and MIMO/smart-antenna communication systems.

smart Everything everywhere Access to content through Small cells Technologies

EAST is focused on the development of Small cell technologies for 5G applications up to 6 GHz

Projects history

High Power RF-DAC

This project investigates the next generation of high power RF-DACs and digital intensive receivers

  1. A Single-Supply Balun-First Three-Way mm-Wave Doherty PA
    Kumaran, Anil Kumar; Pashaeifar, Masoud; Alexanderson, Mats; de Vreede, Leonardus Cornelis Nicolaas; Alavi, Morteza S.;
    IEEE Transactions on Microwave Theory and Techniques,
    pp. 1-16, 2024. DOI: 10.1109/TMTT.2024.3365697
    Keywords: ... Inductors;Integrated circuit modeling;5G mobile communication;Capacitors;Bandwidth;Impedance;Peak to average power ratio;Compact;Doherty;lumped components;millimeter wave;Norton transformation;power amplifier (PA);three-stage.

  2. 32.7 A 25.2dBm PSAT, 35-to-43GHz VSWR-Resilient Chain-Weaver Eight-Way Balanced PA with an Embedded Impedance/Power Sensor
    Pashaeifar, Masoud; Kumaran, Anil K.; De Vreede, Leo C.N.; Alavi, Morteza S.;
    In 2024 IEEE International Solid-State Circuits Conference (ISSCC),
    pp. 532-534, 2024. DOI: 10.1109/ISSCC49657.2024.10454427
    Keywords: ... Time-frequency analysis;5G mobile communication;Transmitters;Linearity;Power amplifiers;Solid state circuits;Reliability.

  3. A Wideband Digital-Intensive Current-Mode Transmitter Line-Up
    Y. Shen; M. Hoogelander; R. Bootsman; M. S. Alavi; L. C. N. de Vreede;
    IEEE Journal Solid-State Circuits,
    Volume 58, Issue 9, pp. 2489-2500, Sep. 2023. DOI: 10.1109/JSSC.2023.3279235

  4. A Wideband Energy-Efficient Multi-Mode CMOS Digital Transmitter
    Beikmirza, Mohammadreza; Shen, Yiyu; de Vreede, Leo C. N.; Alavi, Morteza S.;
    IEEE Journal of Solid-State Circuits,
    Volume 58, Issue 3, pp. 677-690, 2023. DOI: 10.1109/JSSC.2022.3222028

  5. A Wideband Digital-Intensive Current-Mode Transmitter Line-Up
    Shen, Yiyu; Hoogelander, Martijn; Bootsman, Rob; Alavi, Morteza S.; de Vreede, Leo C. N.;
    IEEE Journal of Solid-State Circuits,
    pp. 1-12, 2023. DOI: 10.1109/JSSC.2023.3279235

  6. An Inverted Doherty Power Amplifier Insensitive to Load Variation With an Embedded Impedance Sensor in Its Output Power-Combining Network
    Singh, Gagan Deep; Nemati, Hossein Mashad; Alavi, Morteza S.; de Vreede, Leonardus Cornelis Nicolaas;
    IEEE Transactions on Microwave Theory and Techniques,
    pp. 1-15, 2023. DOI: 10.1109/TMTT.2023.3277081

  7. The Efficiency and Power Utilization of Current-Scaling Digital Transmitters
    Mul, Dieuwert P. N.; Bootsman, Robert J.; Beikmirza, Mohammadreza; Alavi, Morteza S.; de Vreede, Leo C. N.;
    IEEE Transactions on Microwave Theory and Techniques,
    pp. 1-17, 2023. DOI: 10.1109/TMTT.2023.3336984
    Keywords: ... Switches;Radio frequency;Clocks;Logic gates;Transmitters;Power generation;Loading;Current mode;current scaling;digital transmitter (DTX);Doherty;efficiency;multiphase;peak-to-average-power ratio (PAPR);polar;power utilization;RF-DAC;signed Cartesian (SC);upconversion.

  8. PA Output Power and Efficiency Enhancement Across the 2:1 VSWR Circle using Static Active Load Adjustment
    Singh, Gagan Deep; Nemati, Hossein Mashad; Alavi, Morteza S.; de Vreede, Leo C.N.;
    In 2023 IEEE/MTT-S International Microwave Symposium - IMS 2023,
    pp. 211-214, 2023. DOI: 10.1109/IMS37964.2023.10188045
    Keywords: ... Loading;Power amplifiers;Couplers;Microwave theory and techniques;Microwave amplifiers;Power generation;Power Amplifier;VSWR;Coupler;Gallium Nitrite (GaN);HEMT.

  9. A Low-Complexity Digital Predistortion Technique For Digital I/Q Transmitters
    Beikmirza, Mohammadreza; de Vreede, Leo C.N.; Alavi, Morteza S.;
    In 2023 IEEE/MTT-S International Microwave Symposium - IMS 2023,
    pp. 787-790, 2023. DOI: 10.1109/IMS37964.2023.10187914
    Keywords: ... Microwave measurement;Constellation diagram;Transmitters;Bandwidth;Microwave theory and techniques;Predistortion;Digital pre-distortion;DPD;constellation;mapping;digital transmitter;RF-DAC.

  10. A 26GHz Balun-First Three-Way Doherty PA in 40nm CMOS with 20.7 dBm Psat and 20dB Power Gain
    Kumaran, Anil Kumar; Pashaeifar, Masoud; Nemati, Hossein Mashad; de Vreede, Leo C.N.; Alavi, Morteza S.;
    In 2023 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 189-192, 2023. DOI: 10.1109/RFIC54547.2023.10186161
    Keywords: ... Power measurement;5G mobile communication;Radio transmitters;Power amplifiers;Radiofrequency integrated circuits;Frequency measurement;Scattering parameters;Doherty;3-stage Power amplifier;Compact;Millimeter wave;Lumped components;Norton transformation.

  11. A Millimeter-Wave CMOS Series-Doherty Power Amplifier With Post-Silicon Inter-Stage Passive Validation
    Pashaeifar, Masoud; de Vreede, Leo C. N.; Alavi, Morteza S.;
    IEEE Journal of Solid-State Circuits,
    Volume 57, Issue 10, pp. 2999-3013, 2022. DOI: 10.1109/JSSC.2022.3175685

  12. Load-Modulation-Based IMD3 Cancellation for Millimeter-Wave Class-B CMOS Power Amplifiers Achieving EVM < 1.2%
    Pashaeifar, Masoud; de Vreede, Leo C. N.; Alavi, Morteza S.;
    IEEE Microwave and Wireless Components Letters,
    Volume 32, Issue 6, pp. 716-719, 2022. DOI: 10.1109/LMWC.2022.3166257

  13. High-Power Digital Transmitters for Wireless Infrastructure Applications (A Feasibility Study)
    Bootsman, Robert J.; Mul, Dieuwert P. N.; Shen, Yiyu; Hashemi, Mohsen; Heeres, Rob M.; van Rijs, Fred; Alavi, Morteza S.; de Vreede, Leo C. N.;
    IEEE Transactions on Microwave Theory and Techniques,
    Volume 70, Issue 5, pp. 2835-2850, 2022. DOI: 10.1109/TMTT.2022.3153000

  14. A Wideband IQ-Mapping Direct-Digital RF Modulator for 5G Transmitters
    Shen, Yiyu; Bootsman, Robert; Alavi, Morteza S.; de Vreede, Leo C. N.;
    IEEE Journal of Solid-State Circuits,
    Volume 57, Issue 5, pp. 1446-1456, 2022. DOI: 10.1109/JSSC.2022.3144362

  15. A Low-Spur Fractional-N PLL Based on a Time-Mode Arithmetic Unit
    Gao, Zhong; He, Jingchu; Fritz, Martin; Gong, Jiang; Shen, Yiyu; Zong, Zhirui; Chen, Peng; Spalink, Gerd; Eitel, Ben; Alavi, Morteza S.; Staszewski, Robert Bogdan; Babaie, Masoud;
    IEEE Journal of Solid-State Circuits,
    pp. 1-20, 2022. DOI: 10.1109/JSSC.2022.3209338

  16. A Load Insensitive Doherty Power Amplifier with better than −39dBc ACLR on 2:1 VSWR Circle using a Constant 50 Ω Trained Pre-distorted Signal
    Singh, Gagan Deep; Mul, Dieuwert; Nemati, Hossein Mashad; Alavi, Morteza S.; de Vreede, Leo C.N.;
    In 2022 52nd European Microwave Conference (EuMC),
    pp. 222-225, 2022. DOI: 10.23919/EuMC54642.2022.9924452

  17. A 39 W Fully Digital Wideband Inverted Doherty Transmitter
    Bootsman, Robert; Shen, Yiyu; Mul, Dieuwert; Rousstia, Mohadig; Heeres, Rob; van Rijs, Fred; Gajadharsing, John; Alavi, Morteza S.; de Vreede, Leo C.N.;
    In 2022 IEEE/MTT-S International Microwave Symposium - IMS 2022,
    pp. 979-982, 2022. DOI: 10.1109/IMS37962.2022.9865405

  18. A Wideband Two-Way Digital Doherty Transmitter in 40nm CMOS
    Beikmirza, Mohammadreza; Shen, Yiyu; de Vreede, Leo C.N.; Alavi, Morteza S.;
    In 2022 IEEE/MTT-S International Microwave Symposium - IMS 2022,
    pp. 975-978, 2022. DOI: 10.1109/IMS37962.2022.9865506

  19. A Millimeter-Wave Front-End for FD/FDD Transceivers Featuring an Embedded PA and an N-Path Filter Based Circulator Receiver
    Pashaeifar, Masoud; De Vreede, Leo C.N.; Alavi, Morteza S.;
    In 2022 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 11-14, 2022. DOI: 10.1109/RFIC54546.2022.9863209

  20. A 1-to-4GHz Multi-Mode Digital Transmitter in 40nm CMOS Supporting 200MHz 1024-QAM OFDM signals with more than 23dBm/66% Peak Power/Drain Efficiency
    Beikmirza, Mohammadreza; Shen, Yiyu; de Vreede, Leo C.N.; Alavi, Morteza S.;
    In 2022 IEEE Custom Integrated Circuits Conference (CICC),
    pp. 01-02, 2022. DOI: 10.1109/CICC53496.2022.9772797

  21. A 1.66Gb/s and 5.8pJ/b Transcutaneous IR-UWB Telemetry System with Hybrid Impulse Modulation for Intracortical Brain-Computer Interfaces
    Song, Minyoung; Huang, Yu; Shen, Yiyu; Shi, Chengyao; Breeschoten, Arjan; Konijnenburg, Mario; Visser, Huib; Romme, Jac; Dutta, Barundeb; Alavi, Morteza S.; Bachmann, Christian; Liu, Yao-Hong;
    In 2022 IEEE International Solid- State Circuits Conference (ISSCC),
    pp. 394-396, 2022. DOI: 10.1109/ISSCC42614.2022.9731608

  22. A 2.6-to-4.1GHz Fractional-N Digital PLL Based on a Time-Mode Arithmetic Unit Achieving -249.4dB FoM and -59dBc Fractional Spurs
    Gao, Zhong; He, Jingchu; Fritz, Martin; Gong, Jiang; Shen, Yiyu; Zong, Zhirui; Chen, Peng; Spalink, Gerd; Eitel, Ben; Yamamoto, Ken; Staszewski, Robert Bogdan; Alavi, Morteza S.; Babaie, Masoud;
    In 2022 IEEE International Solid- State Circuits Conference (ISSCC),
    pp. 380-382, 2022. DOI: 10.1109/ISSCC42614.2022.9731561

  23. A DPLL-Based Phase Modulator Achieving -46dB EVM with A Fast Two-Step DCO Nonlinearity Calibration and Non-Uniform Clock Compensation
    Gao, Zhong; Fritz, Martin; He, Jingchu; Spalink, Gerd; Staszewski, Robert Bogdan; Alavi, Morteza S.; Babaie, Masoud;
    In 2022 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits,
    pp. 14-15, 2022. DOI: 10.1109/VLSITechnologyandCir46769.2022.9830398

  24. Compact N-Way Doherty Power Combiners for mm-wave 5G Transmitters
    Kumaran, Anil Kumar; Nemati, Hossein Mashad; De Vreede, Leo C.N.; Alavi, Morteza S.;
    In 2022 IEEE International Symposium on Circuits and Systems (ISCAS),
    pp. 438-442, 2022. DOI: 10.1109/ISCAS48785.2022.9937619

  25. A Wideband Four-Way Doherty Bits-In RF-Out CMOS Transmitter
    Beikmirza, Mohammadreza; Shen, Yiyu; de Vreede, Leo C. N.; Alavi, Morteza S.;
    IEEE Journal of Solid-State Circuits,
    Volume 56, Issue 12, pp. 3768-3783, 2021. DOI: 10.1109/JSSC.2021.3105542

  26. A Millimeter-Wave Mutual-Coupling-Resilient Double-Quadrature Transmitter for 5G Applications
    Pashaeifar, Masoud; de Vreede, Leo C. N.; Alavi, Morteza S.;
    IEEE Journal of Solid-State Circuits,
    Volume 56, Issue 12, pp. 3784-3798, 2021. DOI: 10.1109/JSSC.2021.3111126

  27. 14.4 A 24-to-30GHz Double-Quadrature Direct-Upconversion Transmitter with Mutual-Coupling-Resilient Series-Doherty Balanced PA for 5G MIMO Arrays
    Pashaeifar, Masoud; de Vreede, Leo C. N.; Alavi, Morteza S.;
    In 2021 IEEE International Solid- State Circuits Conference (ISSCC),
    pp. 223-225, 2021. DOI: 10.1109/ISSCC42613.2021.9365776

  28. 6.2 A 4-Way Doherty Digital Transmitter Featuring 50%-LO Signed IQ Interleave Upconversion with more than 27dBm Peak Power and 40% Drain Efficiency at 10dB Power Back-Off Operating in the 5GHz Band
    Beikmirza, Mohammadreza; Shen, Yiyu; Mehrpoo, Mohammadreza; Hashemi, Mohsen; Mul, Dieuwert; de Vreede, Leo C.N.; Alavi, Morteza S.;
    In 2021 IEEE International Solid- State Circuits Conference (ISSCC),
    pp. 92-94, 2021. DOI: 10.1109/ISSCC42613.2021.9365831

  29. Efficiency and Linearity of Digital "Class-C Like" Transmitters
    Mul, Dieuwert P.N.; Bootsman, Rob J.; Bruinsma, Quinten; Shen, Yiyu; Krause, Sebastian; Quay, Rüdiger; Pelk, Marco J.; van Rijs, Fred; Heeres, Rob M.; Pires, Sergio; Alavi, Morteza; de Vreede, Leo C.N.;
    In 2020 50th European Microwave Conference (EuMC),
    pp. 1-4, 2021. DOI: 10.23919/EuMC48046.2021.9338122

  30. On-Chip Output Stage Design for a Continuous Class-F Power Amplifier
    Kumaran, Anil Kumar; Pashaeifar, Masoud; D’Avino, Marco; de Vreede, Leo C. N.; Alavi, Morteza S.;
    In 2021 IEEE International Symposium on Circuits and Systems (ISCAS),
    pp. 1-5, 2021. DOI: 10.1109/ISCAS51556.2021.9401788

  31. A 24-to-32GHz series-Doherty PA with two-step impedance inverting power combiner achieving 20.4dBm Psat and 38%/34% PAE at Psat/6dB PBO for 5G applications
    Pashaeifar, Masoud; Kumaran, Anil K.; Beikmirza, Mohammadreza; de Vreede, Leo C.N.; Alavi, Morteza S.;
    In 2021 IEEE Asian Solid-State Circuits Conference (A-SSCC),
    pp. 1-3, 2021. DOI: 10.1109/A-SSCC53895.2021.9634772

  32. A Versatile and Efficient 0.1-to-11 Gb/s CML Transmitter in 40-nm CMOS
    Feng, Jun; Beikmirza, Mohammadreza; Mehrpoo, Mohammadreza; de Vreede, Leo C.N.; Alavi, Morteza S.;
    In 2021 18th International SoC Design Conference (ISOCC),
    pp. 41-42, 2021. DOI: 10.1109/ISOCC53507.2021.9613887

  33. An 18.5 W Fully-Digital Transmitter with 60.4 % Peak System Efficiency
    Bootsman, R.J.; Mul, D.P.N.; Shen, Y.; Heeres, R.M.; van Rijs, F.; Alavi, M.S.; de Vreede, L.C.N.;
    In 2020 IEEE/MTT-S International Microwave Symposium (IMS),
    pp. 1113-1116, 2020. DOI: 10.1109/IMS30576.2020.9223942

  34. A 1–3 GHz I/Q Interleaved Direct-Digital RF Modulator As A Driver for A Common-Gate PA in 40 nm CMOS
    Shen, Yiyu; Bootsman, Rob; Alavi, Morteza S.; de Vreede, Leo C.N.;
    In 2020 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 287-290, 2020. DOI: 10.1109/RFIC49505.2020.9218324

  35. A 0.5-3 GHz I/Q Interleaved Direct-Digital RF Modulator with up to 320 MHz Modulation Bandwidth in 40 nm CMOS
    Shen, Yiyu; Bootsman, Rob; Alavi, Morteza S.; de Vreede, Leonardus;
    In 2020 IEEE Custom Integrated Circuits Conference (CICC),
    pp. 1-4, 2020. DOI: 10.1109/CICC48029.2020.9075949

  36. Bits-In RF-Out Transmitters
    Morteza S. Alavi; Leo de Vreede,;
    In IEEE Radio Frequency Integrated Circuits (RFIC) Symposium Workshop,
    2019.

  37. A Wideband Linear $I/Q$ -Interleaving DDRM
    Mehrpoo, Mohammadreza; Hashemi, Mohsen; Shen, Yiyu; de Vreede, Leo C. N.; Alavi, Morteza S.;
    IEEE Journal of Solid-State Circuits,
    Volume 53, Issue 5, pp. 1361-1373, 2018. DOI: 10.1109/JSSC.2017.2786685

  38. Quasi-load insensitive class-E for Doherty and Outphasing Transmitters
    Leo de Vreede; Morteza S. Alavi;
    In IEEE MTT-S International Microwave Symposium (IMS), Workshop,
    2018.

  39. Pushing the Linearity Limits of a Digital Polar Transmitter
    Hashemi, Mohsen; Alavi, Morteza S.; De Vreede, Leo C.N.;
    In 2018 13th European Microwave Integrated Circuits Conference (EuMIC),
    pp. 174-177, 2018. DOI: 10.23919/EuMIC.2018.8539964

  40. A Wideband I/Q RFDAC-Based Phase Modulator
    Yiyu Shen; Michael Polushkin; Mohammad Reza Mehrpoo; Mohsen Hashemi; Earl McCune; Morteza S. Alavi; Leo C. N. de Vreede,;
    In (accepted RWS 2018).,
    2018.

  41. Bits-In / RF-Out Transmitters for 5G mMIMO
    Leo de Vreede; Morteza S. Alavi;
    In IEEE European Microwave Week (EuMIC) Workshop,
    2018.

  42. A wideband I/Q RFD AC-based phase modulator
    Shen, Yiyu; Polushkin, Michael; Mehrpoo, Mohammadreza; Hashemi, Mohsen; McCune, Earl; Alavi, Morteza S.; de Vreede, Leo C. N.;
    In 2018 IEEE 18th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF),
    pp. 8-11, 2018. DOI: 10.1109/SIRF.2018.8304215

  43. An Intrinsically Linear Wideband Polar Digital Power Amplifier
    Hashemi, Mohsen; Shen, Yiyu; Mehrpoo, Mohammadreza; Alavi, Morteza S.; de Vreede, Leo C. N.;
    IEEE Journal of Solid-State Circuits,
    Volume 52, Issue 12, pp. 3312-3328, 2017. DOI: 10.1109/JSSC.2017.2737647

  44. An intrinsically linear wideband digital polar PA featuring AM-AM and AM-PM corrections through nonlinear sizing, overdrive-voltage control, and multiphase RF clocking
    M. Hashemi; Y. Shen; M. Mehrpoo; M. Acar; R. van Leuken; M. S. Alavi; L. de Vreede;
    In 2017 IEEE International Solid-State Circuits Conference (ISSCC),
    pp. 300-301, February 2017. DOI: 10.1109/ISSCC.2017.7870380
    document

  45. A fully-integrated digital-intensive polar Doherty transmitter
    Y. Shen; M. Mehrpoo; M. Hashemi; M. Polushkin; L. Zhou; M. Acar; R. van Leuken; M. S. Alavi; L. de Vreede;
    In 2017 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 196-199, June 2017. DOI: 10.1109/RFIC.2017.7969051
    document

  46. A wideband linear direct digital RF modulator using harmonic rejection and I/Q-interleaving RF DACs
    M. Mehrpoo; M. Hashemi; Y. Shen; R. van Leuken; M. S. Alavi; L. C. N. de Vreede;
    In 2017 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 188-191, June 2017. DOI: 10.1109/RFIC.2017.7969049
    document

  47. 17.5 An intrinsically linear wideband digital polar PA featuring AM-AM and AM-PM corrections through nonlinear sizing, overdrive-voltage control, and multiphase RF clocking
    Hashemi, Mohsen; Shen, Yiyu; Mehrpoo, Mohammadreza; Acar, Mustafa; van Leuken, René; Alavi, Morteza S.; de Vreede, Leonardus;
    In 2017 IEEE International Solid-State Circuits Conference (ISSCC),
    pp. 300-301, 2017. DOI: 10.1109/ISSCC.2017.7870380

  48. A wideband linear direct digital RF modulator using harmonic rejection and I/Q-interleaving RF DACs
    Mehrpoo, M.; Hashemi, M.; Shen, Y.; van Leuken, R.; Alavi, M. S.; de Vreede, L. C. N.;
    In 2017 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 188-191, 2017. DOI: 10.1109/RFIC.2017.7969049

  49. A fully-integrated digital-intensive polar Doherty transmitter
    Shen, Yiyu; Mehrpoo, Mohammadreza; Hashemi, Mohsen; Polushkin, Michael; Zhou, Lei; Acar, Mustafa; van Leuken, Rene; Alavi, Morteza S.; de Vreede, Leo;
    In 2017 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 196-199, 2017. DOI: 10.1109/RFIC.2017.7969051

  50. A 5.9 GHz RFDAC-based outphasing power amplifier in 40-nm CMOS with 49.2% efficiency and 22.2 dBm power
    Hu, Zhebin; de Vreede, Leo C.N.; Alavi, Morteza S.; Calvillo-Cortes, David A.; Staszewski, Robert Bogdan; He, Songbai;
    In 2016 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 206-209, 2016. DOI: 10.1109/RFIC.2016.7508287

  51. A Wideband 2$\times$ 13-bit All-Digital I/Q RF-DAC
    Alavi, Morteza S.; Staszewski, Robert Bogdan; de Vreede, Leo C. N.; Long, John R.;
    IEEE Transactions on Microwave Theory and Techniques,
    Volume 62, Issue 4, pp. 732-752, 2014. DOI: 10.1109/TMTT.2014.2307876

  52. All-Digital I/Q RF-DAC
    S. M. Alavi;
    PhD thesis, Delft University of Technology, http://doi.org/10.4233/uuid:fd7dec40-1957-4aad-bb24-90d6f40b5268, 06 2014. Promotor: R.B. Staszewski.

  53. A 2×13-bit all-digital I/Q RF-DAC in 65-nm CMOS
    Alavi, Morteza S.; Voicu, George; Staszewski, Robert B.; de Vreede, Leo C. N.; Long, John R.;
    In 2013 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 167-170, 2013. DOI: 10.1109/RFIC.2013.6569551

  54. All-Digital RF $I/Q$ Modulator
    Alavi, Morteza S.; Staszewski, Robert Bogdan; de Vreede, Leo C. N.; Visweswaran, Akshay; Long, John R.;
    IEEE Transactions on Microwave Theory and Techniques,
    Volume 60, Issue 11, pp. 3513-3526, 2012. DOI: 10.1109/TMTT.2012.2211612

  55. A 2-GHz digital I/Q modulator in 65-nm CMOS
    Alavi, Morteza S.; Visweswaran, Akshay; Staszewski, Robert B.; de Vreede, Leo C.N; Long, John R.; Akhnoukh, Atef;
    In IEEE Asian Solid-State Circuits Conference 2011,
    pp. 277-280, 2011. DOI: 10.1109/ASSCC.2011.6123565

  56. Orthogonal summing and power combining network in a 65-nm all-digital RF I/Q modulator
    Alavi, Morteza S.; Staszewski, Robert B.; de Vreede, Leo C. N.; Long, John R.;
    In 2011 IEEE International Symposium on Radio-Frequency Integration Technology,
    pp. 21-24, 2011. DOI: 10.1109/RFIT.2011.6141758

  57. Efficient LDMOS device operation for envelope tracking amplifiers through second harmonic manipulation
    Alavi, Morteza. S.; van Rijs, Fred; Marchetti, Mauro; Squillante, Michele; Zhang, Tao; Theeuwen, Steven J.C.H.; Volokhine, Yuri; Jos, H.F.F.; Heijden, Mark P. v. d.; Acar, Mustafa; de Vreede, Leo C.N.;
    In 2011 IEEE MTT-S International Microwave Symposium,
    pp. 1-4, 2011. DOI: 10.1109/MWSYM.2011.5972665

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Last updated: 3 Jul 2024