AWARDS GRANTS

  

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        PI: Integrated Sensing and Communication RF Circuit Techniques, $1,007,495, 28 December 2023 to 27 December 2027, Industry.

        PI: Terahertz-to-Imaging Integrated Circuit for Security and Health: MOE AcRF Tier 2/ CMOS (T2EP50123-0022), S$704,340, 1 February 2024 to 31 January 2028.

        PI: Testing and design methodology on element design applicable for beyond-5G/6G smart drone communication systems: Keysight Technologies Singapore (Sales), S$900,000 (in-kind), 16 September 2022 to 15 August 2024, Keysight Technologies Singapore (Industry).

PI: CMOS Terahertz Plasmonic Interconnect towards Tera-scale Computing, $788,736, 28 January 2020 to 27 January 2023, AcRF Tier 2 MOE, MOE2019-T2-1-114.

 

PI: Keysight Technologies Singapore – NTU Joint R&D: Transceiver test and development applicable for V2X-System and mmW, S$1,783.750 (including testing in-kind), 22 January 2020 to 21 January 2023, Keysight Technologies Singapore (Industry).

 

PI: WP1: Transceiver Development Applicable for Hybrid “C-V2X+DSRC” V2X-System, S$2,889.900, 1 November 2019 to 31 October 2022, A*STAR (STAT Board), SERC A19D6a0053.

 

PI: LEES III-V + CMOS Circuits & System towards Commercialization, 1 July 2019 to 31 December 2021, LEES-SMART-IRG (SMART No. II-16 LEES IRG), Phase II.

 

PI: Industry: Wireless Heterogeneous Network Transceiver Chipset for Content-Driven Transmission of Learning Media (SLE-RP3) Research Area (SLE), 1st July 2016 to 30th June 2021.

 

PI: Monolithic Terahertz Passive Components in Advanced CMOS Technology: From Fundamental Understandings to Integrated Circuit Applications, 1st  November 2016 to 31st October 2018.

 

PI: Industry: Circuit Design for GaN Based DC-DC Converter Power, 1st June 2016 to 31st December 2018..

 

Industry: An Integrated Platform Approach Towards Non-Invasive Continuous Blood Glucose Monitoring Addressing Clinical Need for Early Diagnosis and Improved Compliance, 1st July 2016 to 30th July 2018.

PI: Industrial Grant (Fortune 500 Company) 10GiFi research & development of ultra-wideband RF transceiver, S$927,840.00, 15th July 2014 to 14th July 201.

PI: High Thermal Resolution Ultra-Low Power Integrated Imager: Fund. Issues in CMOS, $840,000, July 2013 to June 2016, AcRF Tier 2 MOE.

PI: Project 2: Electronic Circuit Design, Communication, S$391,560, April. 2012 to March 2013, LEES-SMART-IRG.

 

        PI: Project 2: Electronic Circuit Design, Communication, S$376,200, April. 2013 to March 2014, LEES-    SMART-IRG. Due to his excellent work and performance, he was again awarded this subcontract.

 

PI: Project 2: Electronic Circuit Design, Communication, S$836,400, April. 2014 to March 2016, LEES-SMART-IRG.

Recently, due to the outstanding feedback on Jan 2014 LEES Annual Review Meeting, he was further awarded a large subcontract amount of S$836,400 as PI under the “Low Energy Electronic Systems” from April 2014 to March 2016. LEES Annual Review Meeting is attended by all the PIs and Scientific Advisory Board (SAB) members which include Prof. Timothy David Sands who was recently appointed as President of Virginia Tech, USA.

 

PI: Ultra-low Power Fully Integrated CMOS 24GHz Receiver, $0.323mil, March 2008 to February 2011, AcRF Tier 1 MOE.

PI: Batteryless Flexible Transceiver for Biomedical Applications, $1,186,270 including scholarships), May 2009 to April 2012, AcRF Tier 2 MOE.

Co-PI: An Ultra Low-Power RFIC Chip For Wireless and Communication Applications S$1.2 mil, March 2006 to February 2009, funded by Agency for Science, Technology and Research (A*STAR).

Co-PI: System-on-chip: Realization of Software Radio, S$0.3 mil, 3 December 2008 to 2 December 2009, University of Electronic Science and Technology (UEST) of China-NTU Joint R&D, jointly funded by UEST and NTU.

Co-PI: An Ultra Low-Power RF Transceiver Chip towards a New Paradigm of Life Quality, S$0.25 mil, 3 December 2008 to 2 December 2009, NRF.

Key Collaborator: Low Energy Electronic Systems which has won the Singapore-MIT Alliance for Research and Technology (SMART) International Research Grant (IRG) proposal with a grant total of S$25million.

Research Interest


My research interests are in the areas of
millimeter-Wave (mmW) and radio frequency (RF) circuits and systems design for Biomedical, Communications and Security applications. For example ECG/Wheeze (Asthma)/Anti-Fall RF sensor network, next generation hand-phone, mmW Camera and wireless local-area network (WLAN) design. I have been looking at methods to improve the design of transceivers (radios) for the above applications in order to achieve ultra-low power, low cost, small die size and good performance.

·  Below is the brief description of my major research accomplishments and related papers:

·  (1) Green RFIC.

·  In this research, I recognized that the rapid scaling of Si technology has brought the technology to the point where various fundamental physical phenomena are beginning to impede the path to further progress. One of the main problems is due to power dissipation and the temperature rise associated with very high power densities. An ultra-low power consumption transceiver makes sense as transceiver is traditionally power hungry. In fact, power consumption relates to the mobility, marketability, functionality and cost of a wireless device (transceiver). It is obvious that the development of ultra-low power consumption transceiver is of extreme importance.

·  An example of my work in this area is the ultra low-power voltage-controlled oscillator (VCO) design. In a conventional VCO design, high current is injected into the circuit to achieve good phase noise performance which is critical to the performance of a transceiver. However, high current will result in high noise. Such kind of method is not ideal due to the high noise and the high power consumption. To date, few VCOs have met the specifications of the WCDMA and CDMA2000 standards due to the stringent phase noise requirement. This is especially true for fully integrated VCOs due to the low inductor Q. Based on the understanding of the flicker noise generation in the MOSFET, a novel method for improving the phase noise performance of a CMOS LC oscillator was investigated. An example of a VCO that meets the system specifications of the WCDMA/CDMA2000 has been achieved through this novel topology. This work was published in IEEE Transaction year 2004 and has 37 citations (Google Scholar) so far [J3].

·  Other related work done by his team includes design of ultra-low power transceiver at sub-threshold region. Design of sub-threshold region has been extensively implemented by watch maker such that the small lithium battery in the watch can last for many years without replacement. In fact, photovoltaic cell that is small enough to be fitted into the front panel of a watch is popularly used to power the watch. However, due to some fundamental limitations, sub-threshold region circuits are mostly employed for low frequency applications like watches and calculators and are often deemed unsuitable for high frequency RF circuits. Through extensive studies on the RF circuits working at sub-threshold region, we have successfully fabricated and tested a 2.45GHz RF circuit (LNA) working at sub-threshold region. The circuit has achieved ultra-low power consumption with good performance. This work by my part-time PhD student was published in IEEE Transaction year 2008 [J8].

·  Our group has later consolidated the experience to successfully design an energy-aware IC chip that will adjust its performance according to the amount of received signal strength and will use the optimum power to receive the signal in a given situation [published in J17, J22, C23, C24, C26]. This work together with the idea of harvesting electromagnetic energy and converting it to useful DC power have resulted in a new generation of ultra-low-power System-on-Chips (SoCs) or "green" SoCs, with quantum leap for power consumption. In other words, power consumption can be reduced to be more than 10 times less compared to conventional RFIC, which will greatly increase its usefulness for daily usage. Thus, green electronics holds the promise as the next generation electronics technology for computer communication and consumer products, where energy-aware design and energy harvesting techniques are part of the overall design considerations to achieve significant energy savings and hence prolonging battery life.

·  We have been awarded several competitive funding for this area of research:

·  • PI: $1,186,270, AcRF Tier 2 MOE.

·  • Co-PI: S$1.2 mil, funded by Agency for Science, Technology and Research (A*STAR).

·  • Collaborator: S$25 mil, funded by NRF.

·  Since 2008, we have published 16 International Journals (mostly in TOP tier), 25 IEEE conference papers, 1 book and 2 book chapters on this topic.

·  Some other highlights of these works include: (1) 5mW energy-aware receiver with comparable performance to those of 70mW conventional receiver. (2) High speed frequency divider that consumes only 25% of the power of conventional frequency divider with the same speed. (3) Smallest 60GHz and 77GHz dual-mode CMOS filter [0.1x0.56mm2] with comparable performance to other larger CMOS filters. All these and more works have been implemented using low cost CMOS 0.18µm technology from local foundry. In addition, all these works have been fabricated and tested physically.

· 

(2) RF and
mmW Components Modeling and Innovation

·  The research of mmW and RFIC will not be complete without thorough investigation on its components modeling and its related innovation. Currently a low performance RFIC transceiver chip can cost as low as 25 US cents. However most RFIC chips are not truly fully integrated, meaning external components are still needed for the RFIC transceiver to work properly. Such external components can easily cost 25 US cents thus doubling the cost of an RFIC transceiver. One of the reasons for using external components like an inductor at RF frequency is due to the low quality factor of integrated inductor implemented in CMOS. Conventional quality factor for an integrated inductor is about 4 to 10, while external inductor can achieved 100 times better quality factor. We have filed a patent together with our industry partner, Chartered Semiconductor (now GlobalFoundries) on a new invention that will allow the quality factor of an integrated inductor to achieve 1000 times higher than conventional inductor. This work currently being pursued by my PhD student (Qiu Ping) [P1] is set to revolutionize the RFIC industry.

·  Extensive work has been done on high speed interconnects, transformers, transistor’s modeling and characterization. Some of these works are done in collaboration with GlobalFoundries.

·  We have been awarded several competitive funding for this area of research:

·  • PI: $0.323mil, AcRF Tier 1 MOE.

·  • Co-PI: S$0.3 mil, University of Electronic Science and Technology (UEST) of China-NTU Joint R&D, jointly funded by UEST and NTU.

·  • Co-PI: S$0.25 mil, NRF.

·  Since 2008, we have published 8 International Journals (mostly in TOP tier), 5 IEEE conference papers and 1 book on this topic.

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