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

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.

EE2C2 Mixed-Signal Circuits and Systems

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

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.
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.
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
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
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
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.
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.
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.
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.
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Bits-In RF-Out Transmitters
Morteza S. Alavi; Leo de Vreede,;
In IEEE Radio Frequency Integrated Circuits (RFIC) Symposium Workshop,
2019.
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
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.
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
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.
Bits-In / RF-Out Transmitters for 5G mMIMO
Leo de Vreede; Morteza S. Alavi;
In IEEE European Microwave Week (EuMIC) Workshop,
2018.
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
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
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
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
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
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
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
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.
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
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
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
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
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