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  • Oct 2017

    Our paper entitled "A 23-30GHz Hybrid Beam-Forming MIMO Receiver Array with Closed-Loop Multi-Stage Front-End Beam-Formers for Full-FoV Dynamic and Autonomous Unknown Signal Tracking and Blocker Rejection" is accepted for publication at IEEE International Solid-State Circuits Conference (ISSCC) 2018. This paper is authored by Min-Yu Huang, Taiyun Chi, Fei Wang, Tso-Wei Li, and Hua Wang. Congratulations team!

  • Oct 2017

    Our paper entitled "A 62-68GHz linear 6Gb/s 64-QAM CMOS Doherty radiator with 27.5%/20.1% PAE at peak/6dB back-off output power leveraging high-efficiency multi-port antenna-based active load modulation" is accepted for publication at IEEE International Solid-State Circuits Conference (ISSCC) 2018. This paper is authored by Huy Thong Nguyen, Taiyun Chi, Sensen Li, and Hua Wang. Congratulations team!

  • Oct 2017

    Our paper entitled "A 64GHz Full-Duplex Transceiver Front-End with An On-Chip Multi-Port Self-Interference-Cancelling Antenna and An All-Passive Canceler Supporting 4Gb/s Modulation in One Antenna Footprint" is accepted for publication at IEEE International Solid-State Circuits Conference (ISSCC) 2018. This paper is authored by Taiyun Chi, Jongseok Park, Sensen Li, and Hua Wang. Congratulations team!

  • Oct 2017

    Our paper entitled "A Continuous-Mode Harmonically-Tuned 19-29.5GHz Ultra-Linear PA Supporting 18Gbit/s at 18.4%
    Modulation PAE and 43.5% Peak PAE" is accepted for publication at IEEE International Solid-State Circuits Conference (ISSCC) 2018. This paper is authored by Tso-Wei Li, Min-Yu Huang, and Hua Wang. Congratulations team!

  • Sep 2017

    Jongseok's paper entitled "A CMOS Wideband Current-Mode Digital Polar Power Amplifier with Built-In AM-PM Distortion Self-Compensation" has been accepted for publication at IEEE Journal of Solid-State Circuits (JSSC).

    Congratulations Jongseok!

  • Jun 2017

    Mr. Kang Yang, an antenna design expert and senior staff engineer from Speed Wireless Technology, joins GEMS lab as a visitng scholar. Welcome aboard Mr. Yang!

  • Sep 2017

    Jongseok, Moez, Sensen, and Taiyun's paper entitled "1024-Pixel CMOS Multi-Modality Joint Cellular Sensor/Stimulator Array for Real-Time Holistic Cellular Characterization and Cell-Based Drug Screening" has been accepted for publication at IEEE Transactions on Biomedical Circuits and Systems (TBCAS).

    This paper presents a fully integrated CMOS multi-modality joint sensor/stimulator array with 1024 pixels. Using on-chip cultured rat cardiomyocytes, measured high-resolution optical opacity images, extracellular potential recordings, biphasic current stimulation, and cellular impedance images demonstrate the unique advantages of the system for real-time holistic cell characterization and drug screening. Moreover, this paper demonstrates the use of optical detection on the on-chip cultured cardiomyocytes to real-time track their cyclic beating pattern and beating rate.

    Congratulations team!

  • Sep 2017

    Yeo Joon Youn is selected to receive the highly prestigious Kwanjeong Educational Foundation (KEF) that will sponsor his PhD study in GEMS group at Georgia Tech.

    The KEF foundation was established in 2000. Its mission is to provide scholarships for excellent Korean students studying abroad and enable them to concentrate on their studies and develop their full potential. Each year KEF selects distinguished Korean students who will pursue their advanced studies in widely recognized universities outside of Korea. The scholarship recipients are selected based on their outstanding undergraduate academic performance, the excellence of their graduate programs, and the potential impact of their graduate research.

    Yeo Joon Youn received his B.Sc in Electrical and Computer Engineering (ECE) at Seoul National University (SNU), Seoul, South Korea (Summa Cum Laude) in summer 2017. He received a 2-year National Scholarship for Science and Engineering from Korea Student Aid Foundation in 2014-2015. He won the Silver Medal of the University Students Contest of Mathematics in Korean Mathematical Society in 2008.

    Starting from fall 2017, Yeo Joon pursues his PhD study at Georgia Tech GEMS lab. His PhD research focuses on multi-modal hybrid biology/nano-electronics systems for sensing, actuation, and energy harvesting.

  • Aug 2017

    Sanghoon Lee, B.Sc in EE from University of Massachusetts, Amherst (Magna Cum Laude) and 2017 Georgia Tech Presidential Fellowship award winner, joins GEMS lab as a Ph.D. student. Welcome aboard, Sanghoon!

  • Aug 2017

    Tzu-Yuan Huang, B.Sc in ECE from NCTU Taiwan and M.S. in CE from NTU Taiwan, joins GEMS lab as a Ph.D. student. Welcome aboard, Tzu-Yuan!

  • Aug 2017

    Adam Wang, B.Sc in EE and Math from Vanderbilt University (Summa Cum Laude) and 2017 Georgia Tech Presidential Fellowship award winner, joins GEMS lab as a Ph.D. student. Welcome aboard, Adam!

  • Aug 2017

    Yeojoon Yoon, B.Sc at SNU South Korea (Summa Cum Laude), joins GEMS lab as a Ph.D. student. Welcome aboard, Yeojoon!

  • Aug 2017

    Taiyun, Sensen, and Jongseok's journal paper entitled "A Multi-Feed Antenna for High-Efficiency On-Antenna Power Combining" has been accepted for publication at IEEE Transactions on Antennas and Propagation (T-AP).

    This paper presents a theoretical study on various multi-feed antenna topologies and their capabilities of achieving direct on-antenna power combining with high-efficiency. Several new multi-feed antenna designs are experimentally demonstrated in this paper.

    Congratulations Team!

  • Aug 2017

    Tso-Wei's journal paper entitled "A Millimeter-Wave Fully Integrated Passive Reflection-Type Phase Shifter with Transformer-Based Multi-Resonance Loads for 360° Phase Shifting" has been accepted for publication at IEEE Transactions on Circuits and Systems I: Regular Papers (TCAS-I).

    This paper gives a comprehensive review on fully integrated passive reflection-type phase shifters (RTPS) with various reflective loads. It demonstrates a new transformer-based multi-resonance RTPS at 60GHz that covers 360° full phase range with the best reported phase-shift/insertion-loss FOM of 37.1°/dB.

    Congratulations Tso-Wei!

  • Jun 2017

    Mr. Zhanyi Qian, an antenna design expert and senior staff engineer from Speed Wireless Technology, joins GEMS lab as a visitng scholar. Welcome aboard Mr. Qian!

  • Jun 2017

    Our 5G mm-Wave research on multi-band mm-Wave Doherty power amplifier and multi-feed antenna for direct on-antenna power combining will be presented as an invited paper at IEEE Bipolar/BiCMOS Circuits and Technology Meeting (BCTM), Sep. 2017.

    Congratulations team!

  • Jun 2017

    Sensen and Taiyun's paper entitled "A Millimeter-Wave Dual-Feed Square Loop Antenna for 5G Communications" has been accepted for publication at IEEE Transactions on Antennas and Propagation (T-AP). This paper will be presented in the IEEE T-AP Special Issue on “Antennas and Propagation Aspects of 5G Communications" in October 2017.

    Congratulations Sensen and Taiyun!

  • May 2017

    Dr. Wang will serve as the Guest Editor of the IEEE Journal of Solid-State Circuits (JSSC) special issue for the IEEE 2017 BCTM conference.

  • May 2017

    Edgar has been selected as a GEM fellow based on his academic record, prior awards, and current Ph.D. research. He is also selected as an Intel scholar, and he will join Intel Corporation as a summer intern in 2017.

    Congratulations on these achievements, Edgar!

  • Apr 2017

    Dr. Wang will serve as a steering committee member for the IEEE Radio Frequency Integrated Circuits Symposium (RFIC) starting from 2018.

  • Apr 2017

    Dr. Wang will serve as a steering committee member for the IEEE Custom Integrated Circuits Conference (CICC) starting from 2018.

  • Mar 2017

    Dr. Yoshitaka Niida from Fujitsu Laboratories LTD. (Japan) joins GEMS lab as a visitor scholar. Welcome aboard Dr. Niida!

  • Mar 2017

    Dr. Wang is invited to serve as a Technical Program Committee (TPC) member on the RF subcommittee for the IEEE International Solid-State Circuits Conference (ISSCC) in 2018.

  • Mar 2017

    Our invited paper entitled "Addressing the Challenges of 5G Systems: Research at the Georgia Institute of Technology" is accepted for publication at IEEE 2017 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI). This invited paper is co-authored by Dr. Andrew Peterson, Dr. Hua Wang, Dr. Manos Tentzeris, Dr. Geoffrey Li, and Dr. Ian Akyildiz at the School of ECE of Georgia Tech.

  • Mar 2017

    Song's paper entitled "A Compact Broadband Mixed-Signal Power Amplifier in Bulk CMOS with Hybrid Class-G and Dynamic Load Trajectory Manipulation" has been accepted for publication at IEEE Journal of Solid-State Circuits (JSSC).

    Congratulations Song!

  • Jan 2017

    Dr. Wang is selected to receive the 2017 Outstanding Young Engineer Award of the IEEE Microwave Theory and Techniques Society (MTT-S). This award recognizes an outstanding young MTT-S Member, who has distinguished him/herself through achievement(s), which may be technical (within the MTT-S Field of Interest), exemplary service to the MTT-S, or a combination of both.

    The award will be conferred at the annual Society Awards Banquet to be held during the IEEE MTT-S International Microwave Symposium the week of 5-9 June, 2017 in Honolulu, Hawaii.

  • Jan 2017

    Min-Yu and Fei are selected as the winners of ISSCC Analog Devices Inc. Outstanding Student Designer Award in 2017. Congratulations Min-Yu and Fe!

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  • Jan 2017

    Taiyun and Min-Yu's paper in collaboration with Professor Foster Dai's group from Auburn University has been accepted for publication at IEEE Custom Integrated Circuits Conference (CICC) 2017. The paper is entitled "A Bidirectional Lens-Free Digital-Bits-In/-Out 0.57mm2 Terahertz Nano-Radio in CMOS with 49.3mW Peak Power Consumption Supporting 50cm Internet-of-Things Communication."

    This paper is also nominated for the 2017 IEEE CICC Best Student Paper Award!

    Congratulations team!

  • Jan 2017

    Jongseok, Moez, Doohwan, Taiyun, and Sensen's paper in collaboration with Professor Hee Cheol Cho's group from Emory University has been accepted for publication at IEEE Custom Integrated Circuits Conference (CICC) 2017. The paper is entitled "A CMOS 22k-Pixel Single-Cell Resolution Multi-Modality Real-Time Cellular Sensing Array."

    Congratulations team!

  • Jan 2017

    Our paper in collaboration with Professor Foster Dai's group from Auburn University has been accepted for publication at IEEE Custom Integrated Circuits Conference (CICC) 2017. The paper is entitled "A 330μW 1.25ps 400fs-INL Vernier Time-to-Digital Converter with 2D Reconfigurable Spiral Arbiter Array and 2nd-Order ΔΣ Linearization."

    Congratulations team!

  • Dec 2016

    Min-Yu, Taiyun, and Fei's paper entitled "An All-Passive Negative Feedback Network for Broadband and Wide Field-of-View Self-Steering Beam-Forming with Zero DC Power Consumption" has been accepted for publication at IEEE Journal of Solid-State Circuits (JSSC).

    Congratulations team!

  • Dec 2016

    Jongseok is selected to receive the IEEE Solid-State Circuits Society (SSCS) Predoctoral Achievement Award for 2015-2016 for the research on "Multi-Modality Cellular Interface with Single-Cell Resolution and Tissue-Level Field-of-View (FoV)."

    This is the highest honor for PhD students from the IEEE SSCS society. Congratulations Jongseok!

  • Nov 2016

    Our paper entitled "Live Demonstration: A 1024-Pixel CMOS Multi-Modality Sensing Array for Cell-Based Assays" won the 2016 IEEE SENSORS Conference Best Live Demo Award (2nd Place). This paper is authored by Jong Seok Park, Moez Karim Aziz, Taiyun Chi, Amy Su, Andrew Zhao, Hee Cheol Cho, Mark Styczynski, and Hua Wang.

    In this paper, we present a live demonstration of a CMOS multi-modality cellular biosensor array chip for drug screening and cell-based assays. The multi-modality sensing functionality enables real-time measurements of multiple physiological parameters of biological cells and cell clusters. Compared with existing single-modality sensors, our multi-modality sensor captures multi-physics cellular responses with a high spatiotemporal resolution, substantially expanding our capabilities of monitoring cellular states and understanding complex drug mechanistic effects. For our live demonstration, we operate our CMOS sensor chip with various bio-samples, including on-chip cultured E Coli. bacteria colonies, to present its multi-modality sensing capability and clinical relevance.

    Congratulations team!

  • Nov 2016

    Min-Yu and Edgar's papers are accepted for publication at the Government Microcircuit Applications and Critical Technology Conference (GOMACTech) 2017. Congratulations Min-Yu and Edgar!

  • Oct 2016

    Our paper entitled "A Packaged 90-300GHz Transmitter and 115-325GHz Coherent Receiver in CMOS for Full-Band Continuous-Wave Mm-Wave and THz Hyperspectral Imaging" is accepted for publication at IEEE International Solid-State Circuits Conference (ISSCC) 2017. This paper is authored by Taiyun Chi, Min-Yu Huang, Sensen Li, and Hua Wang. Congratulations team!

  • Oct 2016

    Song and Fei's paper entitled "A 28GHz/37GHz/39GHz Multiband Linear Doherty Power Amplifier for 5G Massive MIMO Applications" is accepted for publication at IEEE International Solid-State Circuits Conference (ISSCC) 2017. Congratulations Song and Fei!

  • Oct 2016

    Jongseok's paper entitled "A 24dBm 2-to-4.3GHz Wideband Digital Power Amplifier with Built-In AM-PM Distortion Self-Compensation" is accepted for publication at IEEE International Solid-State Circuits Conference (ISSCC) 2017. Congratulations Jongseok!

  • Oct 2016

    Our paper entitled "A 60GHz On-Chip Linear Radiator with Single-Element 27.9dBm Psat and 33.1dBm Peak EIRP Using Multi-Feed Antenna for Direct On-Antenna Power Combining" is accepted for publication at IEEE International Solid-State Circuits Conference (ISSCC) 2017. This paper is authored by Taiyun Chi, Fei Wang, Sensen Li, Min-Yu Huang, Jong Seok Park, and Hua Wang. Congratulations team!

  • Sep 2016

    Jongseok and Song's paper entitled "A Highly Linear Dual-Band Mixed-Mode Polar Power Amplifier in CMOS with An Ultra-Compact Output Network" won the IEEE CICC 2015 Best Student Paper Award! The award will be presented to them at the IEEE CICC 2017 that will be held in April in Austin Texas.

    Congratulations Jongseok and Song on your excellent work!

    This paper presents a highly linear dual-band mixed-mode polar power amplifier (PA) fully integrated in a standard 65 nm bulk CMOS process. Without using any switch or tunable elements, an ultra-compact single-transformer-based passive network provides optimum load impedance transformation simultaneously at two operating frequencies (2.6GHz/4.5GHz), reducing the PA chip size by 50%. The mixed-mode PA also leverages both digital and analog techniques to dynamically suppress the AM-AM and AM-PM distortions and to support highly linear complex modulations (256QAM).

    This is the world-first demonstration of a fully-integrated CMOS power amplifier that supports two operation frequencies using one single on-chip transformer for ultra-compact chip area. This work was performed through our collaboration program with Intel Corporation.

  • Aug 2016

    Edgar Garay won the Alfred P. Sloan Foundation's Minority PhD (MPHD) Scholarship and became a Sloan Scholar!

    Congratulations Edgar on receiving this prestigious award!

  • Jun 2016

    Jongseok and Song's paper entitled "A Highly Linear Dual-Band Mixed-Mode Polar Power Amplifier in CMOS with An Ultra-Compact Output Network" has been accepted for publication at IEEE Journal of Solid-State Circuits (JSSC).

    Congratulations Jongseok and Song!

  • May 2016

    Min-Yu and Taiyun's RFIC paper entitled "A 5GHz All-Passive Negative Feedback Network for RF Front-End Self-Steering Beam-Forming with Zero DC Power Consumption" won the IEEE RFIC 2016 Best Student Paper Award (2nd Place)!

    Congratulations Min-Yu and Taiyun on your excellent work!

    In this paper, we proposed and demonstrated an all-passive RF front-end phased-array beam-forming scheme that can autonomously form a receiver beam and track the direction of an unknown incident RF beam.

    The beam-former only consists of fully integrated passive components and consumes zero DC power. More importantly, the proposed beam-former processes the signal information in both phase and voltage domains, and the nonlinear conversions between the two signal domains are exploited to achieve a negative feedback loop with a large loop gain for high-accuracy phased-array beam-forming and autonomous beam-tracking. A proof-of-concept 4-element self-steering beam-former is implemented in a standard 130nm CMOS process and occupies a tiny integrated circuit (IC) chip area of 4.1mm2. To the best of the team's knowledge, this is the first demonstration of an all-passive negative feedback network capable of performing front-end self-steering beam-forming with zero DC power. The demonstration of this all-passive scheme outperforms any reported active self-steering beam-formers that often consume hundreds of milli-watt or watts of power consumption.

    Photograph at 2016 IEEE RFIC Student Best Paper Award Ceremony: (From left to right) Professor Albert Wang (University of California, Riverside, Conference General Chair of 2017 IEEE RFIC), Min-Yu Huang (1st Author), and Professor Hua Wang

  • May 2016

    Our IEEE Microwave Magazine paper entitled "The Wireless Workhorse: Mixed-Signal Power Amplifiers Leverage Digital and Analog Techniques to Enhance Large-Signal RF Operations" won the 2016 Microwave Magazine Best Paper Award of the IEEE Microwave Theory and Techniques Society (MTT-S)!

    The Microwave Magazine Best Paper Award recognizes a peer-reviewed technical article from the prior calendar year that provides the finest overview of the state of the art in a given area of the MTT Society’s field of interest.

    Our paper reviews recently reported new architectures for silicon-based power amplifiers (PAs) that exploit mixed-signal (both analog and digital) techniques to substantially improve PA performance, such as PA back-off power efficiency, in-band/out-of-band linearity, and robustness against antenna load variations. These advanced PA architectures and designs have become complex mixed-signal/mixed-mode RF systems with orchestrated collaborations among analog, digital, and large-signal RF operations.

    Photograph at 2016 IEEE IMS Award Banquet: (From left to right) Song Hu, Professor Hua Wang, and Professor Ke Wu (Polytechnique Montréal, 2016 president of the IEEE Microwave Theory and Techniques Society MTT-S)

  • Mar 2016

    Moez won the 2016 National Science Foundation (NSF) Graduate Research Fellowship! This is one of the top graduate student fellowship honors from US federal funding agencies.

    Congratulations Moez on receiving this prestigious award!

  • Mar 2016

    Song won the 2016 Roger P. Webb ECE Graduate Research Assistant Excellence Award!

    This is the highest honor for Georgia Tech ECE graduate students to recognize their outstanding research achievements. This honor is awarded to only two PhD students every year selected among the entire School of ECE.

    Congratulations Song on receiving this prestigious award!

  • Mar 2016

    Jongseok and Taiyun's paper entitled "An High-Density CMOS Multi-Modality Joint Sensor/Stimulator Array with 1024 Pixels for Holistic Real-Time Cellular Characterization" has been accepted for publication at 2016 IEEE Symosia on VLSI Technology and Circuits (VLSI)!

    Congratulations Jongseok and Taiyun!

  • Mar 2016

    Dr. Wang won the 2016 Sigma Xi Young Faculty Award of the Georgia Tech Chapter!

    The Sigma Xi Georgia Tech chapter annually awards two junior faculty members for their outstanding research achievements at Georgia Tech, as evidenced by publications, program development results, and other research contributions with highlights for the achievements in the previous calendar year.

  • Feb 2016

    Taiyun is selected to receive the 2016 IEEE Microwave Theory and Techniques Society (MTT-S) Graduate Fellowship on Medical Applications.

    Congratulations Taiyun!

  • Feb 2016

    Min-Yu and Taiyun's paper entitled "A 5GHz All-Passive Negative Feedback Network for RF Front-End
    Self-Steering Beam-Forming with Zero DC Power Consumption" has been accepted for publication at 2016 IEEE Radio Frequency Integrated Circuits Symposium (RFIC)!

    This paper has also been selected as a 2016 IEEE RFIC Best Student Paper Award Finalist!

    Congratulations Min-Yu and Taiyun!

     

  • Feb 2016

    Song and Fei's paper entitled "A Transformer-Based Inverted Complementary Cross-Coupled VCO with a 193.3dBc/Hz FoM and 13kHz 1/f3 Noise Corner" has been accepted for publication at 2016 IEEE Radio Frequency Integrated Circuits Symposium (RFIC)!

    Congratulations Song and Fei!

  • Feb 2016

    Song's paper entitled "A Compact Broadband Mixed-Signal Power Amplifier in Bulk CMOS with Hybrid Class-G and Dynamic Load Trajectory Manipulation Operations" has been accepted for publication at 2016 IEEE Radio Frequency Integrated Circuits Symposium (RFIC)!

    Congratulations Song!

     

  • Feb 2016

    Our invited paper entitled "Mixed-Signal Doherty Power Amplifiers in CMOS" has been accepted for publication at Proc. IEEE International Microwave Symposium (IMS) in 2016!

    This paper is invited for the the special IMS session “Celebrating the 80th anniversary of the Doherty Patent" as a new Doherty power amplifier (PA) architecture with digital reconfiurability to achieve real-time PA back-off efficiency optimization and robustness against in-field antenna load variation.

  • Feb 2016

    Sensen and Taiyun's paper entitled "A Fully Packaged D-Band MIMO Transmitter Using High-Density Flip-Chip Interconnects on A Flexible LCP Substrate" has been accepted for publication at Proc. IEEE International Microwave Symposium (IMS) in 2016! This paper is based on a collaboration project with Professor John Papapolymerou.

    Congratulations, Sensen and Taiyun!

  • Feb 2016

    Min-Yu's paper entitled "An Ultra-Compact Folded Inductor Based Mm-Wave Rat-Race Coupler in CMOS" has been accepted for publication at Proc. IEEE International Microwave Symposium (IMS) in 2016!

    Congratulations, Min-Yu!

  • Feb 2016

    Fei's paper entitled "An N-Way Transformer Based Wilkinson Power Divider in CMOS" has been accepted for publication at Proc. IEEE International Microwave Symposium (IMS) in 2016!

    Congratulations, Fei!

  • Feb 2016

    Fei's paper entitled "A Broadband Low-Loss Compact 4×4 Butler Matrix in CMOS with Stacked Transformer Based Quadrature Couplers" has been accepted for publication at Proc. IEEE International Microwave Symposium (IMS) in 2016!

    Congratulations, Fei!

  • Jan 2016

    Our hybrid class-G digital Doherty PA chip microphotograph is shown on the cover page of the February issue of the IEEE Microwave Magazine!

  • Jan 2016

    Tso-Wei is selected as the winner of ISSCC Analog Devices Inc. Outstanding Student Designer Award in 2016. Congratulations Tso-Wei!

  • Dec 2015

    Dr. Wang and Dr. Kaushik Sengupta's book, RF and mm-Wave Power Generation in Silicon, is now published!

  • Dec 2015

    Song is selected to receive the IEEE Solid-State Circuits Society (SSCS) Predoctoral Achievement Award for 2015-2016 for the research on "Mixed-Signal Power Amplifier Architecture with Self-Contained In-Situ Linearization and Efficiency Enhancement."

    This is the highest honor for PhD students from the IEEE SSCS society. Congratulations Song!

  • Nov 2015

    Song's paper entitled "A Broadband Mixed-Signal CMOS Power Amplifier with A Hybrid Class-G Doherty Efficiency Enhancement Technique" has been accepted for publication at IEEE Journal of Solid-State Circuits (JSSC).

    This paper proposes and demonstrates a broadband mixed-signal CMOS PA with a hybrid Class-G Doherty architecture for PA efficiency enhancement up to the deep power back-off (PBO) region. The PA is fully integrated in a standard 65 nm bulk CMOS process, and achieves +26.7 dBm peak output power (Pout) with 40.2% peak drain efficiency (DE) at 3.71 GHz. The DE at 6 and 12 dB PBO are 1.8× and 2.6× over the Class-B operation, advancing the state-of-the-art CMOS PA PBO efficiency performance.

    Congratulations Song!

  • Nov 2015

    Taiyun and Jongseok's paper entitled "A Multi-Modality CMOS Sensor Array for Cell-Based Assay and Drug Screening" has been accepted for publication at IEEE Transactions on Biomedical Circuits and Systems (TBCAS).

    This paper demonstrates the world-first multi-modality CMOS sensor array for real-time and holistic characterization of cell physiological responses. Comprehensive biological experiments with different living cell samples demonstrate the functionality and benefit of the proposed multi-modality sensing in cell-based assay and drug screening applications.

    Congratulations Taiyun and Jongseok!

  • Nov 2015

    Jongseok's paper entitled "A Transformer-Based Poly-Phase Network for Ultra-Broadband Quadrature Signal Generation" has been accepted for publication at IEEE Transactions on Microwave Theory and Techinques (T-MTT).

    This paper demonstrates a fully integrated all-passive network in a standard 65nm bulk CMOS that can generate high-quality differential quadrature signals (4-phases) for a world-first one-decade bandwidth (2GHz-20GHz) with low-loss (3.65dB) and compact area. The 2-20GHz coverage is the instantaneous bandwidth without using any band selection switches or tunable components.

    Congratulations Jongseok!

  • Oct 2015

    Jongseok's paper entitled "A Fully Differential Ultra-Compact Broadband Transformer-Based Wilkinson Power Divider,” has been accepted for publication at IEEE Microwave and Wireless Component Letter (MWCL).

    This paper demonstrates a fully integrated novel transformer-based Wilkinson power divider/combiner in a standard 130nm SiGe BiOCMOS process. A proof-of-concept implementation at 60GHz achieves low-loss (1.32dB), well balanced output magnitude/phase (0.2dB/5 degrees), and 64% 1dB insertion-loss bandwidth.

    Congratulations Jongseok!

  • Sep 2015

    Our review paper on mixed-signal power amplifiers (PAs) is published at IEEE Microwave Magazine. The paper is entitled "The Wireless Workhorse: Mixed-Signal Power Amplifiers Leverage Digital and Analog Techniques to Enhance Large-Signal RF Operations."

    This paper reviews recently reported CMOS PA architectures that exploit mixed-signal (both analog and digital) techniques to substantially improve PA performance, such as PA back-off efficiency, in-band/out-of-band linearity, and robustness against antenna load variations. These advanced CMOS PA designs have become complex mixed-signal/mixed-mode RF systems with orchestrated collaborations among analog, digital, and large-signal RF operations.

  • Sep 2015

    Our collaboration work with Georgia Tech Integrated 3D System Group (I3DS) on hybrid biosensor system has been accepted for publication at 2015 IEEE International Electron Devices Meeting (IEDM). IEEE IEDM is the flagship conference for nanometer-scale CMOS transistor technology, advanced memory, displays, sensors, MEMS devices, novel quantum and nano-scale devices and phenomenology, optoelectronics, devices for power and energy harvesting, high-speed devices, as well as process technology and device modeling and simulation.

    Our talk is entitled "A Microfabricated Electronic Microplate Platform for Low-cost Repeatable Bio-sensing Applications."

    Congratulations on this successful collaboration work, Taiyun!

  • Sep 2015

    Our collaboration work with Georgia Tech Integrated 3D System Group (I3DS) on Silicon Membranes/CMOS IC hybrid biosensor system has been accepted for publication at 2015 IEEE Biomedical Circuits and Systems Conference (BioCAS).

    Our talk is entitled "Fabrication of and Cell Growth on ‘Silicon Membranes’ with High Density TSVs for Bio-sensing Applications."

    Congratulations on this successful collaboration work, Taiyun!

  • Sep 2015

    Our silicon-based THz signal generation work has been invited to present at the 2015 IEEE Asia-Pacific Microwave Conference (APMC). Our talk is entitled "A Hybrid Technique for PA Back-Off Efficiency Enhancement - A Broadband Mixed-Signal Class-G Doherty PA in CMOS."

  • Sep 2015

    Our hybrid Class-G Doherty Power Amplifier research work has been invited to present at the 2015 IEEE Power Amplifier Topical Symposium at the University of California, San Diego. Our talk is entitled "A Hybrid Technique for PA Back-Off Efficiency Enhancement - A Broadband Mixed-Signal Class-G Doherty PA in CMOS."

  • Aug 2015

    Dr. Wang becomes a faculty member of the Georgia Tech Parker H. Petit Institute for Bioengineering and Bioscience.

  • Jul 2015

    SRC is awarded a two-year funding from NIST (National Institute of Standards and Technology) to develop a Semiconductor Synthetic Biology (SSB) Consortium and Roadmap for future Semiconductor Synthetic Biology technologies.

    Dr. Wang is selected to serve as the chair for the Technical Working Group of "Intelligent Sensor System" and a member of the Roadmap Executive Committee in this SRC-NIST SSB roadmap effort. The mission of this Technical Working Group is to investigate potential technologies to enable the next-generation synthetic biology-semiconductor interfacing.

  • Jul 2015

    Song's paper paper entitled "Design of A Transformer-Based Reconfigurable Digital Polar Doherty Power Amplifier Fully Integrated in Bulk CMOS" was among the Top 13 Most Frequently Downloaded Documents for IEEE Journal of Solid State Circuits (JSSC) in May 2015. Congratulations Song!

  • Jun 2015

    Jong Seok and Song's paper entitled "A Highly Linear Dual-Band Mixed-Mode Polar Power Amplifier in CMOS with An Ultra-Compact Output Network" has been nominated for the 2015 IEEE CICC Best Student Paper Award! Congratulations, Jong Seok and Song!

  • Jun 2015

    Tso-Wei and Jong Seok's paper entitled "A 2-24GHz 360-Degree Full-Span Differential Vector Modulator Phase Rotator with Transformer-Based Poly-Phase Quadrature Network" has been nominated for the 2015 IEEE CICC Best Student Paper Award! Congratulations, Tso-Wei and Jong Seok!

  • Jun 2015

    Chengjie (Bert) Zhu has been selected as a recipient of the Georgia Tech President’s Undergraduate Research Salary Award (PURA) for Fall 2015 based on his research on Paramagnetic Lab-on-Chip (LoC) Platform with Microfluidic Channel. This is the 2nd time for Chengjie to win this highly prestigious undergraduate research award!

    Congratulations Chengjie!

  • Jun 2015

    Jong Seok and Song's paper entitled "A Highly Linear Dual-Band Mixed-Mode Polar Power Amplifier in CMOS with An Ultra-Compact Output Network" has been accepted for publication at IEEE Custom Integrated Circuits Conference (CICC) in 2015! Congratulations, Jong Seok and Song!

  • Jun 2015

    Tso-Wei and Jong Seok's paper entitled "A 2-24GHz 360-Degree Full-Span Differential Vector Modulator Phase Rotator with Transformer-Based Poly-Phase Quadrature Network" has been accepted for publication at IEEE Custom Integrated Circuits Conference (CICC) in 2015! Congratulations, Tso-Wei and Jong Seok!

  • Jun 2015

    Tso-Wei's paper entitled "A Millimeter-Wave Fully Differential Transformer-Based Passive Reflective-Type Phase Shifter" has been accepted for publication at IEEE Custom Integrated Circuits Conference (CICC) in 2015! Congratulations, Tso-Wei!

  • May 2015

    Our invited review paper entitled "Mixed-Signal Power Amplifiers: Leveraging Digital and Analog Techniques to Enhance Large-Signal RF Operations" has been accepted for publication at IEEE Microwave Magazine.

  • May 2015

    Dr. Wang is selected to serve on the technical committee (TC) for the IEEE/CAS-EMB Biomedical Circuits and Systems Conference (BioCAS) starting from 2015.

  • Apr 2015

    Our research on multi-modality CMOS biosensor array and its applications in synthetic biology research, drug development, chemical scanning, and personalized medicine receives press coverage at EETimes and other major news media.

    We are combining CMOS microelectronics and living biological components to build hybrid "cyborg-like" systems for sensing, actuation, signal process, and biological synthesis.

    Our ultimate goal is to see if we could eventually build a CMOS hybrid life form.

    EETimes, SRC, Bloomberg, Business Wire, Phys.org, Solid State Technology, Virtual-Strategy Magazine, Digital Journal, EIN News Desk, R&D Magazine, EETimes (Japan)

  • Apr 2015

    Georgia Tech press release on our multi-modality CMOS biosensor array research.

    Georgia Tech News Center, Georgia Tech Research Horizons, Georgia Tech School of ECE News, Georgia Tech IEN News

  • Apr 2015

    Dr. Wang receives the 2015 Roger P. Webb ECE Outstanding Junior Faculty Member Award.

    Georgia Tech School of ECE News

  • Mar 2015

    Taiyun's paper entitled "A Multi-Phase Sub-Harmonic Injection Locking Technique for Bandwidth Extension in Silicon-Based THz Signal Generation" has been accepted for publication at IEEE Journal of Solid-State Circuits (JSSC). Congratulations Taiyun!

  • Mar 2015

    Toshak Singhal joins GEMS lab as a master student. Welcome aboard Toshak!

  • Mar 2015

    Song's paper paper entitled "Antenna Impedance Variation Compensation By Exploiting A Digital Doherty Power Amplifier Architecture" was among the Top 10 Most Frequently Downloaded Documents for IEEE Transactions on Microwave Theory and Techinques (T-MTT) in February 2015. Congratulations Song!

  • Mar 2015

    Song's paper entitled "Design of A Transformer-Based Reconfigurable Digital Polar Doherty Power Amplifier Fully Integrated in Bulk CMOS" has been accepted for publication at IEEE Journal of Solid-State Circuits (JSSC). Congratulations Song!

  • Feb 2015

    Dr. Wang is selected to receive the 2015 Lockheed Dean’s Excellence in Teaching Award.

    The purpose of this award is to recognize outstanding educators from among the untenured junior faculty from the Georgia Tech Schools of Aerospace Engineering, Electrical and Computer Engineering, Mechanical Engineering, and the College of Computing. Award recipients are selected for extraordinary effectiveness in classroom teaching, educational innovations, inspiration transmitted to students, direct impact and involvement with students, and impact on the postgraduate success of students.

  • Feb 2015

    Song is selected to receive the IEEE Microwave Theory and Techniques Society (MTT-S) Graduate Fellowship for the research on "Digital Intensive Hybrid Architectures for Efficiency and Linearity Improvement in Silicon-based RF Power Amplifier." Congratulations Song!

  • Feb 2015

    Taiyun's paper entitled "A +2.3dBm 124-158GHz Class-C Frequency Quadrupler with Folded-Transformer Based Multi-Phase Driving" has been accepted for publication at IEEE Radio Frequency Integrated Circuits Symposium (RFIC). Congratulations Taiyun!

  • Feb 2015

    Dr. Wang is elevated to a senior member of IEEE.

  • Feb 2015

    Dr. Wang won the 2015 National Science Foundation (NSF) CAREER award.

  • Feb 2015

    Dr. Wang serves as an Organizational Committee Member for the IEEE Custom Integrated Circuits Conference (CICC) starting from 2015.

  • Jan 2015

    Jongseok's paper entitled "A Transformer-Based Poly-Phase Network for Ultra-Broadband Quadrature Signal Generation" has been accepted for publication at IEEE International Microwave Symposium (IMS). Congratulations Jongseok!

    Taiyun's collaboration paper with GT SiGe group and GT MiRCTECH group entitled "A D-band (110 to 170 GHz) SPDT Switch in 32 nm CMOS SOI" has been accepted for publication at IEEE International Microwave Symposium (IMS). Congratulations Taiyun!

  • Jan 2015

    Taiyun is selected as the winner of ISSCC Analog Devices Inc. Outstanding Student Designer Award in 2015. Congratulations Taiyun!

  • Jan 2015

    Tabish joins GEMS lab as a master student for his "Special Problem" Graduate Research Program. Evan joins GEMS lab as an undergraduate researcher. Welcome aboard Tabish and Evan!

  • Dec 2014

    Our IEEE Atlanta SSCS/CASS joint chapter wins the IEEE SSCS Outstanding Chapter Award of 2014! In each year, only one chapter selected among all the 85 IEEE SSCS chapters in the world receives this outstanding chapter award, which recognizes the chapter's excellence in organzing professional and education outreach activities.

    This award will be officially annouced at the Plenary Session of the IEEE International Solid-State Circuits Conference (ISSCC) in Feb 2015.

  • Dec 2014

    Song's paper entitled "Antenna Impedance Variation Compensation By Exploiting A Digital Doherty Power Amplifier Architecture" has been accepted for publication at IEEE Transactions on Microwave Theory and Techniques (T-MTT). Congratulations Song!

  • Nov 2014

    GEMS lab has 3 papers accepted for publication at the 2015 Government Microcircuit Applications & Critical Technology Conference (GOMACTech)! Congratulations Tso-Wei, Stefan, and Song on your excellent work!

  • Oct 2014

    Jongseok and Taiyun's paper entitled "A Multi-Modality CMOS Sensor Array for Cell-Based Assay and Drug Screening" has been accepted for publication at IEEE International Solid-State Circuits Conference (ISSCC) 2015. Congratulations Jongseok and Taiyun!

  • Oct 2014

    Song's paper entitled "A Broadband CMOS Digital Power Amplifier with Hybrid Class-G Doherty Efficiency Enhancement" has been accepted for publication at IEEE International Solid-State Circuits Conference (ISSCC) 2015. Congratulations Song!

  • Sep 2014

    Taiyun won the Texas Instruments CICC Student Scholarship Award! Taiyun's paper is one of the highest rated papers among the Best Student Paper finalists submitted to 2014 CICC. The award winning paper is entitled "A Multi-Phase Sub-Harmonic Injection Locking Technique for Bandwidth Extension in Silicon-Based THz Signal Generation."

    Congratulations Taiyun on your excellent work!

    Photograph at 2014 IEEE CICC Conference: (From left to right) Dr. Don Thelen (ON Semiconductor, Technical Program Chair of 2014 IEEE CICC) and Taiyun Chi.
  • Aug 2014

    Our work on CMOS Power Amplifiers has been invited to present at the 2014 Power Amplifier Symposium at the University of California, San Diego. Our talk is entitled "Enhancing Doherty Power Amplifier Operation by A Digitally Reconfigurable Architeture.

  • Aug 2014

    Manoj Aripirala joins GEMS lab as a master student for his "Special Problem" Graduate Research Program. Tianhao Li joins GEMS lab as an undergraduate researcher. Welcome aboard Manoj and Tianhao!

  • Aug 2014

    Min-Yu Huang and Fei Wang join GEMS lab as PhD students. Welcome aboard Min-Yu and Fei!

  • Aug 2014

    Dr. Wang starts to serve as an associate editor of the IEEE Microwave and Wireless Components Letters (MWCL). This is one of the journal publications with the IEEE Microwave Theory and Technique (MTT) Society.

  • Jul 2014

    Dr. Wang is awarded the Demetrius T. Paris Junior Professorship in Electrical and Computer Engineering at Georgia Tech.

  • Jun 2014

    Choongsoon and Chengjie's paper entitled "A Reconfigurable Bio-Impedance Sensing Platform With Array-Based Detection Algorithm for 3D Tissue Characterization and Delineation" has been accepted by BMES 2014 Annual Meeting. Congratulations Choongsoon and Chengjie!

  • Jun 2014

    Dr. Wang has been selected as the 2014 Class of 1969 Teaching Scholar at Georgia Tech.

  • Jun 2014

    Dr. Venkatesh Ramalingam joined GEMS lab as part of the Georgia Intern Fellowship Teacher (GIFT) Program. Dr. Ramalingam has 18 years of teaching experience as a high school teacher in Physics and Mathematics. We are proud of having him join our GEMS lab and help us further expand our K-12 outreach activities.

    Welcome aboard Venkatesh!

  • Jun 2014

    Song and Jongseok's RFIC paper entitled "A +27.3dBm Transformer-Based Digital Doherty Polar Power Amplifier Fully Integrated in Bulk CMOS" won the IEEE RFIC 2014 Best Student Paper Award (1st Place)!

    Congratulations Song and Jongseok on your excellent work!

    In this paper, we proposed a novel digital Doherty polar power amplifier (PA) circuit architecture and implemented it in a standard 65nm CMOS process.

    Our proposed digital Doherty PA architecture leverages digital reconfigurability and achieves (1) optimum Doherty active load-modulation operation for maximum PA back-off efficiency enhancement and (2) optimum AM-AM and AM-PM linearization. These desired properties enable the wireless transmission of high data-rate with drastically enhanced efficiency, and therefore extended battery life in mobile devices. In addition, we have demonstrated that such a digital Doherty architecture can be reconfigured to achieve robust PA performance against antenna load variations. This aspect of the design opens the door for in-field transmitter reconfiguration to ensure optimum wireless transmission under different or even time-varying radiation environments.

    This digital Doherty PA circuit architecture can be further extended to other integrated circuit process to address non-commercial applications.

    RFIC Besty Student Paper Award GEMS 2014

    Photograph at 2014 IEEE RFIC Student Best Paper Award Ceremony: (From left to right) Professor Hua Wang, Jong Seok Park, Song Hu (1st Author), and Lawrence Kushner (BAE Systems, Conference General Chair of 2014 IEEE RFIC)

  • Jun 2014

    GEMS lab won the 2014 Defense University Research Instrumentation Program (DURIP) award!

    The proposed research focuses on "Characterization and Development of Energy-Efficient Scalable Integrated THz Signal Sources."

    Dr. Wang serves as the PI of this DURIP project.

  • Jun 2014

    Taiyun and Song's paper entitled "A Multi-Phase Sub-Harmonic Injection Locking Technique for Bandwidth Extension in Silicon-Based THz Signal Generation" has been accepted by IEEE Custom Integrated Circuits Conference (CICC) 2014 and has been nominated for the 2014 CICC Best Student Paper Award! Congratulations Taiyun and Song!

  • Jun 2014

    An invited paper entitled "A New Wave of CMOS Power Amplifier Innovations: Fusing Digital and Analog Techniques with Large Signal RF Operations" has been accepted by IEEE Custom Integrated Circuits Conference (CICC) 2014. We collaborated with Toshiba and Caltech on this review paper which summarizes state-of-the-art CMOS Power Amplifier Techniques.

  • Jun 2014

    Taiyun and Jongseok's paper entitled "A Low-Power and Ultra-Compact W-band Transmitter Front-End in 90 nm SiGe BiCMOS Technology" has been accepted by IEEE Bipolar/BiCMOS Circuits and Technology Meeting (BCTM) 2014. Congratulations Taiyun and Jongseok!

  • May 2014

    GEMS lab receives the Georgia Tech IEN Seed Grant. This grant will support our research on Post Processing and Packaging Techniques Development for CMOS Biosensors.

  • Apr 2014

    Dr. Wang will serve as the chair for a special session entitled "CMOS Biosensors for Molecular Diagnostics and Cellular Monitoring" at IEEE 2014 Biomedical Circuits and Systems Conference (BioCAS) in Lausanne Switzerland in October 2014. Dr. Sam Kavusi, Bio-ASICs technical lead at Robert Bosch Research and Technology Center, will serve as the session co-chair.

  • Mar 2014

    Dr. Wang is invited to give a seminar talk on his teaching innovation at the Engaging Conversations Series at the Georgia Tech Center for the Enhancement of Teaching and Learning (CETL) in April 2014. The title of the talk is "'You're Hired!' --- Using a Mock Job Interview to Review Course Concepts".

  • Feb 2014

    Dr. Wang is invited to give a tutorial talk on "CMOS Biosensors for Molecular Diagnostics and Cellular Monitoring" at the International Symposium on Quality Electronic Design (ISQED) in March 2014.

  • Feb 2014

    Jongseok's paper entitled "A K-Band 10-Bit Digital Linear Phase Rotator with Folded Transformer Based Ultra-Compact Quadrature Generation" has been accepted for publication at IEEE Radio Frequency Integrated Circuits (RFIC) 2014. Congratulations Jongseok!

  • Feb 2014

    Song's paper entitled "A +27.3dBm Transformer-Based Digital Doherty Polar Power Amplifier Fully Integrated in Bulk CMOS" has been accepted for publication at IEEE Radio Frequency Integrated Circuits (RFIC) 2014. Congratulations Song!

  • Jan 2014

    Dr. Wang is selected to serve on the technical program committee (TPC) for the IEEE Custom Integrated Circuits Conference (CICC) starting from 2014.

  • Jan 2014

    Mohan Yang joined GEMS lab as an undergraduate researcher. Welcome aboard Mohan!

  • Jan 2014

    Stefan Lepkowski joined GEMS lab as a master student. Welcome aboard Stefan!

  • Jan 2014

    Xiangyu Mao joined GEMS lab as an undergraduate researcher. Welcome aboard Xiangyu!

  • Dec 2013

    Jongseok is selected as the winner of ISSCC Analog Devices Inc. Outstanding Student Designer Award in 2014. Congratulations Jongseok!

  • Dec 2013

    Song is selected as the winner of ISSCC Analog Devices Inc. Outstanding Student Designer Award in 2014. Congratulations Song!

  • Dec 2013

    Dr. Wang's paper entitled "Magnetic Sensors for Diagnostic Medicine: CMOS-Based Magnetic Particle Detectors for Medical Diagnosis Applications" was among the "Top 25 Most Frequently Downloaded Documents for IEEE Microwave Maganzine" in August, September, and November 2013.

  • Nov 2013

    Dr. Wang received sponsorship from Qualcomm for the RFIC Student Design Competition Awards in his class of ECE6420 Wireless IC.

  • Nov 2013

    Hao Ye joined GEMS lab. Welcome aboard Hao!

  • Oct 2013

    Adam Gleason joined GEMS lab. Welcome aboard Adam!

  • Oct 2013

    A Georgia Tech research team led by Dr. Hua Wang and Dr. Mark P. Styczynski won Semiconductor Research Corporation (SRC) funding to develop next-generation biosensors. The team was awarded a three-year research contract of $475,000, including the contribution from both SRC and the State of Georgia.

    Please find the press release about our Georgia Tech program on the websites of GT Department of Electrical and Computer Engineering and GT Institute for Electronics and Nanotechnology (IEN). Our program is part of SRC's Semiconductor Synthetic Biology (SSB) reseach initiative, which is featured on SRC, EE Times, Yahoo! Finance, and several other public websites.

  • July 2013

    Chengjie (Bert) Zhu has been selected as a recipient of the Georgia Tech President’s Undergraduate Research Salary Award (PURA) for Fall 2013 based on his research on real-time 3D tumor imaging. Congratulations Chengjie!

  • June 2013

    Dr. Wang has been selected as the 2013 Class of 1969 Teaching Fellow at Georgia Tech.

  • June 2013

    Jongseok and Taiyun's paper entitled “An Ultra-Broadband Compact Mm-Wave Butler Matrix in CMOS for Array-Based MIMO Systems” has been accepted by IEEE Custom Integrated Circuits Conference (CICC) 2013. Congratulations Jongseok and Taiyun!

  • June 2013

    Jongseok's paper entitled “A Fully Differential Ultra-Compact Broadband Transformer Based Quadrature Generation Scheme” has been accepted by IEEE Custom Integrated Circuits Conference (CICC) 2013. Congratulations Jongseok!

  • April 2013

    Choongsoon and Chengjie's paper entitled “A Microscopic Real-Time 3D Impedance Imaging Technique for Precise and Accurate Tumor Remove" has been accepted by Center for Clinical and Translational Science Conference, University of Kentucky. This is a collaboration research between GEMS and University of Kentucky School of Medicine. Congratulations Choongsoon and Chengjie!

  • Dec 2012

    Jongseok's paper entitled “A Passive Quadrature Generation Scheme for Integrated RF Systems” has been accepted by IEEE MTT-S International Wireless Symposium (IWS) 2013. Congratulations Jongseok!

Last revised on July 3rd, 2013.