Dr Chong Li

Senior Lecturer (Electronic & Nanoscale Engineering)

telephone: +44 141 330 4626
email: Chong.Li@glasgow.ac.uk

School of Engineering, R207 80 Oakfield Avenue, G12 8LT

ORCID iD https://orcid.org/0000-0001-5654-0039

Biography

I obtained a PhD degree in Electronics and Electrical Engineering from the University of Glasgow in 2012. My PhD involved developing monolithic millimetre-wave signal sources and integrated circuits. From Aug. 2011, I took up a post as a Postdoctoral Research Assistant, and later a Postdoctoral Research Associate at the University of Glasgow, working on development of terahertz imaging systems. I joined the National Physical Laboratory (NPL) in January 2014 as a Higher Research Scientist. I rejoined Glasgow University in August 2017 as a lecturer and found the Microwave and Terahertz Electronics (MaTE) group. I am the Director of Electronic System Design Centre (https://www.gla.ac.uk/research/az/esdc/) and managing the Microwave and Terahertz Laboraotory (see below for further details).

I am a Visiting Lecturer at the University of Stratchclyde (2022-2025) and was a visiting researcher at the Advanced Technology Institute (ATI), University of Surrey in 2017. I was a member of the European Microwave Association (EuMA) General Assembly (GA) representing Group 4 (United Kingdom, Ireland, Gibraltar, Malta) between 2018 and 2021. I was the Chair of Workshop & Short Courses of EuMW2021 and I am an Associate Editor for Royal Society Open Science since 2017. I've served as a member of the technical programme committee for several conferences. I won the best paper twice at Loughborough Antennas and Propagation Conference (LAPC).

Research interests

I am leading the Microwave and THz Electronics (MaTE) Group and interested in:

III-V (InP/GaAs/GaN) semiconductor devices and fabrication processes
MMICs and TMICs
emerging materials and technologies for wireless sensing, imaging, communications and energy harvesting;
metrology for antennas and propagation; and
metrology for on-wafer measurements.

Summer students, final year/MSc project students, self-funded/government-funded PhD students are welcome to my group. Please contact me if you have any brilliant ideas about any of the above listed topic(s) or something else.

Equipment and Facilities

I am currently managing the Microwave and Terahertz Laboraotry which is equiped with the state-of-art instruments for characterisation of RF, microwave, mmWave and THz devices and systems. Information about micro-/nano-fabrication can be found on the JWNC website. Here below list some of the equipment for measurements from RF to THz:

Anntenna measurement systems

0.5 GHz-18 GHz anechoic chamber
30 GHz-50 GHz OTA system
140 GHz-220 GHz near field planar antenna scanning system
220 GHz-325 GHz near field planar antenna scanning system
750 GHz-1.1 THz near field planar antenna scanning system

On-wafer power and S-parameter measurement systems

10 MHz-110 GHz on-wafer VNA system integrated with semi-automated probe station
110 - 170, 140 -220 GHz, 220 -325 GHz, 325-500 GHz and 500 - 750 GHz on-wafer VNA systems
750 GHz -1.1 THz on-wafer VNA system and material characterisation kits

Other measurement capabilities

Spectrum analyer and power meter for up to 1 THz
70 GHz oscilloscope exented to 110-170 GHz and 220 GHz- 325 GHz (March 2023)
50 GHz arbitary waveform generator exented to 110-170 GHz and 220 GHz- 325 GHz (March 2023)
110 -170 GHz and 750 GHz-1.1 THz material characterisation kit (MCK)
kV Semiconductor device analyser for DC & Pulsed IV/CV measurement (on-wafer)
DC-40 GHz high/low temprature (77K/675K) manual probe station with permanent maganet

Postdoctoral Opportunities

PDRA1:

A fantastic opportunity has arisen for a 2-year Research Associate post working on antennas and wireless systems. You will contribute to a high profile EPSRC funded project-EPIQC. Contact me for further details.

PDRA2:

This is a new opportunity focusing on cryogenic microwave components and systems for quantum computer systems. This project is funded by the recent award of EPSRC New Horizon scheme and the initial appointment for this post is 21 months. The candidate must have profound knowledge and expereince in design, modelling and test of microwave components such as filters, and antennas. Established publication track record is necessary. Contact me for further details.

PhD projects

Making the quantum computers wireless
The first computer ENIAC, which was invented 75 years ago, occupied 170 square meters and weighted almost 50 tonnes. Nobody at the time would imagine how computers could be evolved to what they look like today. Quantum computing, which is believed to be one of the most significant revolutions of 21^st century is still at its dawn, facing the same challenges as first computers did half a century ago: bulky, expensive, and difficult to operate. We are here at Glasgow University bold and ambitious! Funded by EPSRC’s WiQC and EPIQC projects, we will take a risky but potentially rewarding step for the next generation of quantum computers: making the quantum computers wireless. Want to be part of this? Please get in touch.
Pushing the limits of low noise amplifiers: from semiconductor materials, device physics, nanofabriacation to circuit design
Low noise amplifiers (LNAs) are the most important components of all RF systems such as communications, RADAR, astronomy observation, and remote sensing. The conventional key performance parameters of LNAs include noise figure, gain, linearity, and bandwidth. However, the recent advance of quantum computer systems has added another performance factor: DC power consumption which makes development of LNAs even challenging. In this project, you will take advantage of Glasgow University’s world leading nanofabrication and test facilities (JWNC and ESDC) and continue Glasgow University’s legacy on transistors flourish again.
GaN-based diodes and tranistors for water and gas sensing

Ionic pollution in water and concentrations of gases, vapours and volatile organic compounds in air are becoming threads to human health, food safety and environments. GaN-based field effect transistor (FET)-based sensors have recently been demonstrated a viable solution due to their high sensitivity to the surface charge. However, the current technologies e.g. GaN transistors require tens of milliwatts which are not sustainable in many applications. In this project, we aim to reduce power consumptions of the sensors by at least two orders via co-optimisation of devices, circuits and systems.

Compact monolithic integrated circuits for Beyond5G/6G wireless communications

With commercial 5G networks rolling out globally from 2019 onwards, the agenda for research into next-generation mobile communications has become a priority for academia and industry. One of the main challenges in cracking future communication systems is highly efficient RF front-end or transceiver. As the operating frequencies of future communications move into the millimetre wave domain, e.g. 30 GHz and above, the performance of electronic devices such as amplifiers and passive component integrated circuits will degrade in a number of ways, including lower efficiency, higher power consumption and poor integratability. In this project, you will take advantage of Glasgow University’s world leading nanofabrication and test facilities (JWNC and ESDC) and devise, fabricate and test compact transceivers operating at 110 GHz and above.

Development of wireless charging technology for wireless sensor nodes
Wireless sensor nodes (WSN) have been found in many applications including environment monitoring, building structural health checks, and personal medical diagnosis etc. In most cases, sensor nodes are powered by built-in batteries which are bulky and can only last for short time. Replacing batteries can be very expensive or impossible in some scenarios. In the past decade, many energy harvesting approaches converting ambient energy e.g. solar, thermal, and acoustics to power WSNs have been studied; however, they face various limitations, e.g. weather conditions, size, distance, and communications. RF/microwave signals e.g. GPS, WiFi, 4G/5G are nowadays everywhere and they have the advantage of low attenuation in air and being less affected by weather conditions. That makes them suitable for long distance applications; however, RF/microwave signals suffer from high loss in water or inside human bodies. To use them in those conditions, different media such as ultrasound has to be implemented. In this project we will investigate a novel hybrid microwave-ultrasound transducer for both energy harvesting and wireless communications. We will tackle the challenges of RF/Microwave sensing, RF/Microwave to ultrasound frequency conversion, and ultrasound transducer efficiency. The candidate student will investigate new material, device modelling, circuit design and micro/nano fabrication. Finally, a hybrid transducer with integration of CMOS sensors will be tested for underwater monitoring or/and medical diagnosis.

follow the link to apply:

https://www.gla.ac.uk/postgraduate/howtoapplyforaresearchdegree/#applyonline

Publications

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Number of items: 95.

2023

Kazim, J. U. R. et al. (2023) Wireless Microwave Signal Transmission for Cryogenic Applications. In: 2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Portland, Oregon, USA, 23–28 July 2023, (Accepted for Publication)

Xia, Y., Yuan, M., Dobrea, A., Li, C. , Heidari, H. , Mottram, N. and Ghannam, R. (2023) Reconfigurable wearable antenna for 5G applications using nematic liquid crystals. Nano Select, (Accepted for Publication)

Leitenstorfer, A. et al. (2023) The 2023 Terahertz Science and Technology Roadmap. Journal of Physics D: Applied Physics, (doi: 10.1088/1361-6463/acbe4c) (Early Online Publication)

Wang, Y., Fu, X., Wu, A., Huo, Y., Liu, C., Luan, P., Lei, L., Liang, F. and Li, C. (2023) An advanced calibration method for probe leakage correction in on-wafer test systems. IEEE Transactions on Microwave Theory and Techniques, 71(2), pp. 682-690. (doi: 10.1109/TMTT.2022.3200050)

Aniel, F. et al. (2023) Terahertz electronic devices. In: Rudan, M., Brunetti, R. and Reggiani, S. (eds.) Springer Handbook of Semiconductor Devices. Series: Springer Handbooks. Springer: Cham, pp. 807-849. ISBN 9783030798277 (doi: 10.1007/978-3-030-79827-7_22)

2022

Li, C. (2022) Advances in Leakage Corrections for On-wafer S-parameter Measurements. European Microwave Week 2022, Milan, Italy, 25-30 Sep 2022.

Wang, Y., Huang, T., Jin, S., Wang, C., Shen, H., Li, C. , Li, Y. and Wu, W. (2022) A self-biased GaN LNA with 30 dB Gain and 21 dBm P1dB for 5G communications. International Journal of Microwave and Wireless Technologies, (doi: 10.1017/S175907872200085X) (Early Online Publication)

Cheng, H., Dhongde, A., Karami, K. , Reynolds, P. , Thoms, S. , Wasige, E. and Li, C. (2022) Reliable T-gate Process for THz HEMTs. UK Semiconductors 2022, Sheffield, UK, 6-7 July 2022.

Zhong, M., Cumming, D. and Li, C. (2022) Power Enhancement of Planar Gunn Oscillators Using Injection Locking. UK Semiconductors 2022, Sheffield, UK, 6-7 July 2022.

Li, C. (2022) Modelling and Correction of Probe-Probe Crosstalk at mm wave Frequencies. International Microwave Symposium 2022, Denver, CO, USA, 19-24 Jun 2022.

Karami, K. , Dhongde, A., Cheng, H., Reynolds, P. M. , Thoms, S. , Reddy, B. A., Ritter, D., Li, C. and Wasige, E. (2022) Robust sub-100 nm T-gate fabrication process using multi-step development. MNE EUROSENSORS 2022, Leuven, Belgium, 19-23 September 2022. (Accepted for Publication)

Wang, J., Xue, L.-Y., Liu, B. and Li, C. (2022) Design of Terahertz InP pHEMT Using Machine Learning Assisted Global Optimization Techniques. In: European Microwave Week 2021, London, UK, 02-07 Apr 2022, pp. 67-70. ISBN 9781665447225 (doi: 10.23919/EuMIC50153.2022.9784068)

Farage, M.E. and Li, C. (2022) A W-Band Rectangular Waveguide CRLH Frequency Scanning Array. In: 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Delft, The Netherlands, 28 Aug - 02 Sep 2022, (Accepted for Publication)

Zhong, M. Y., Cumming, D. R.S. and Li, C. (2022) Numerical and Experimental Investigations of Self-mixing Effect of a Planar Gunn Diode Oscillator. In: 2021 16th European Microwave Integrated Circuits Conference (EuMIC), London, UK, 03-04 Apr 2022, pp. 390-393. ISBN 9782874870644 (doi: 10.23919/EuMIC50153.2022.9783700)

Al-Moathin, A. et al. (2022) EML based on identical epitaxial layer, side-wall grating and HSQ planarization. IEEE Photonics Technology Letters, 34(6), pp. 317-320. (doi: 10.1109/LPT.2022.3155730)

Al-Moathin, A., Smith, M. D., Thayne, I. , Kuball, M. and Li, C. (2022) Low Damage High Selectivity Cl2/N2/O2-Based Inductively Coupled Plasma Etching for GaN/AlGaN Heterostructures. UKNC Winter Meeting 2022, 05-06 Jan 2022. (Accepted for Publication)

Danilin, S. , Barbosa, J., Farage, M., Zhao, Z., Shang, X., Burnett, J., Ridler, N., Li, C. and Weides, M. (2022) Engineering the microwave to infrared noise photon flux for superconducting quantum systems. EPJ Quantum Technology, 9, 1. (doi: 10.1140/epjqt/s40507-022-00121-6)

2021

Abohmra, A., Abbas, H. , Kazim, J. U. R., Rabbani, M. S., Li, C. , Alomainy, A., Imran, M. A. and Abbasi, Q. H. (2021) An ultrawideband microfabricated gold-based antenna array for terahertz communication. IEEE Antennas and Wireless Propagation Letters, 20(11), pp. 2156-2160. (doi: 10.1109/LAWP.2021.3072562)

Al-Moathin, A., Li, C. , Wang, J., Al-Taai, Q. R. A. , Eddie, I., Ye, S. , Hou, L. , Thoms, S. , Kelly, A. and Marsh, J. H. (2021) Traveling-Wave Electroabsorption Modulated Laser Based on Identical Epitaxial Layer Scheme and HSQ Planarization. In: CLEO/Europe-EQEC 2021, Munich, Germany, 21-25 Jun 2021, ISBN 9781665418768 (doi: 10.1109/CLEO/Europe-EQEC52157.2021.9542652)

Ahmad, W. , Li, C. and Gamage, K. A.A. (2021) Deployment of Robots Remotely in Teaching Programming and Robotics – Future of Engineering Laboratories. In: Practical Engineering Education 21 Conference (PEE-21), Sheffield, UK, 16-17 Sept 2021,

Scott-George, A., Li, C. , Tang, Y. K. , Shimul, S., Tareq Bin Ali, M., Marma, A. and Pal, S. (2021) A Review on the Sustainability of Solar Home System for Rural Electrification. In: 6th International Conference on Sustainable and Renewable Energy Engineering (ICSREE 2021), Strasbourg, France, 5-7 May 2021, 02003. (doi: 10.1051/e3sconf/202129402003)

Das, S. et al. (2021) Design and Analysis of an AC Coupled Photovoltaic System for an Off-grid Community in Chittagong Hill Tracts. In: 6th International Conference on Renewable Energy Generation and Applications (ICREGA), Al Ain, United Arab Emirates, 02-04 Feb 2021, pp. 39-43. ISBN 9781728183015 (doi: 10.1109/ICREGA50506.2021.9388295)

Farage, M., Zhao, Z., Abbasi, Q. and Li, C. (2021) Evaluation of a 300 GHz Near Field Antenna Measurement System. IET Colloquium on Millimetre-wave and Terahertz Engineering and Technology 2021, 17-18 Mar 2021.

Al-Moathin, A., Li, C. , Hou, L. and Marsh, J. H. (2021) Novel Design for Electroabsorption Modulator Based on Microstrip Transmission Line Technology. In: Semiconductor and Integrated Opto-Electronics (SIOE) Conference, 30 March - 1 April 2021, (Accepted for Publication)

2020

Zhao, Z., Farage, M. E., Yi, Y. and Li, C. (2020) A Quasi-optical THz Imaging System Using a One-port Vector Network Analyser. In: 5th International Conference on the UK-China Emerging Technologies (UCET 2020), Glasgow, UK, 20-21 Aug 2020, ISBN 9781728194899 (doi: 10.1109/UCET51115.2020.9205425)

Wu, A., Liu, C., Liang, F., Zou, X., Wang, Y., Luan, P. and Li, C. (2020) Calibration on the fly—a novel two-port S-parameter measurement method for on-wafer leaky systems. IEEE Transactions on Microwave Theory and Techniques, 68(8), pp. 3558-3564. (doi: 10.1109/TMTT.2020.2988461)

Li, C. , Wu, A., Liu, C., Liang, F., Wang, Y. and Luan, P. (2020) A “Calibration on the Fly” Method for Millimeter-wave On-wafer Measurement. 13th UK-Europe-China Workshop on Millimetre Waves and THz Technologies (UCMMT 2020), Tianjin, China, 29 Aug - 01 Sep 2020. (Accepted for Publication)

Wu, A., Fu, X., Liu, C., Li, C. , Wang, Y., Liang, F. and Luan, P. (2020) Optimal design of passive devices for verifying on-wafer noise parameter measurement systems. IEEE Transactions on Instrumentation and Measurement, 69(6), pp. 2837-2844. (doi: 10.1109/TIM.2019.2929671)

Vosti, H., Stant, L. T., Matei, C., Salter, M. J., Li, C. , Ridler, N. M. and Aaen, P. H. (2020) An Interferometric Characterization Technique for Extreme Impedance Microwave Devices. In: 94th ARFTG Microwave Measurement Symposium, San Antonio, TX, USA, 26-29 Jan 2020, ISBN 9781728120577 (doi: 10.1109/ARFTG47584.2020.9071748)

Wang, Y., Li, L.-A., Li, C. , Ao, J.-P., Wang, X. and Hao, Y. (2020) Thermal analysis of AlGaN/GaN hetero-structural Gunn diodes on different substrates through numerical simulation. IEEE Journal of the Electron Devices Society, 8, pp. 134-139. (doi: 10.1109/JEDS.2020.2967473)

2019

Al-Moathin, A., Hou, L. , Ofiare, A., Wang, J., Ye, S. , Li, C. and Marsh, J. H. (2019) Thick film hydrogen silsesquioxane planarization for passive component technology associated with electronic-photonic integrated circuits. Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures, 37(6), 061210. (doi: 10.1116/1.5123286)

Ridler, N. M., Clarke, R. G., Li, C. and Salter, M. J. (2019) Strategies for traceable submillimeter-wave vector network analyzer measurements. IEEE Transactions on Terahertz Science and Technology, 9(4), pp. 392-398. (doi: 10.1109/TTHZ.2019.2911870)

Chen, A., Li, C. , Huang, Y. and Zhou, J. (2019) Compact mm-Wave Coplanar Diplexer Design Without Using Air-bridges. The 12th UK/Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT 2019), London, UK, 20-22 Aug 2019.

Li, C. , Tang, Y. K. , Saha, S., Bin Ali, M. T. and Basith, M. A. (2019) Current Status of Solar Home Systems in Bangladesh. 7th European Conference on Renewable Energy Systems, Madrid, Spain, 10-12 June 2019.

Li, C. , Tang, Y. K. , Saha, S., Ali, M. T. B., Basith, M. A. and Marma, A. (2019) Feasibility Studies on Deploying a Self-Contained Solar-Hydraulic Pilot Power Plant in a Rural Area in Bangladesh. Project Report. University of Glasgow. (Unpublished)

2018

Li, C. , Liu, C., Wu, A. and Ridler, N. (2018) A new SOLT calibration method for leaky on-wafer measurements using a 10-term error model. IEEE Transactions on Microwave Theory and Techniques, 66(8), pp. 3894-3900. (doi: 10.1109/TMTT.2018.2832052)

Zahid, A., Yang, K., Heidari, H. , Li, C. , Imran, M. A. , Alomainy, A. and Abbasi, Q. H. (2018) Terahertz Characterisation of Living Plant Leaves for Quality of Life Assessment Applications. In: Microwave and Radar Week (MIKON-2018 and Baltic URSI Symposium-2018, Poznań, Poland, 14-17 May 2018, pp. 117-120. ISBN 9788394942137 (doi: 10.23919/URSI.2018.8406770)

Clarke, R.G., Li, C. and Ridler, N.M. (2018) An Intra-laboratory Investigation of On-wafer Measurement Reproducibility at Millimeter-wave Frequencies. In: 2017 90th ARFTC Microwave Measurement Symposium (ARFTG), Boulder, CO, USA, 28 Nov - 01 Dec 2017, ISBN 9781538643563 (doi: 10.1109/ARFTG.2017.8255866)

Wu, A., Li, C. , Sun, J., Wang, Y. and Liu, C. (2018) Development of a Verification Technique for On-wafer Noise Figure Measurement Systems. In: 2017 90th ARFTC Microwave Measurement Symposium (ARFTG), Boulder, CO, USA, 28 Nov - 01 Dec 2017, ISBN 9781538643563 (doi: 10.1109/ARFTG.2017.8255878)

2017

Votsi, H., Li, C. , Aaen, P. H. and Ridler, N. M. (2017) An active interferometric method for extreme impedance on-wafer device measurements. IEEE Microwave and Wireless Components Letters, 27(11), pp. 1034-1036. (doi: 10.1109/LMWC.2017.2750086)

Li, C. , Liua, C., Wua, A. and Ridlera, N. (2017) Uncertainty Analysis of Calibration Standards for On-wafer Measurements over 110 GHz. UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies, Liverpool, UK, 11-13 Sep 2017. (Unpublished)

Li, C. , Loh, T.-H., Tian, Z., Xu, Q. and Huang, Y. (2017) Evaluation of chamber effects on antenna efficiency measurements using non-reference antenna methods in two reverberation chambers. IET Microwaves, Antennas and Propagation, 11(11), pp. 1536-1541. (doi: 10.1049/iet-map.2015.0838)

Ridler, N. and Li, C. (2017) Benchmarking Electrical Loss in Rectangular Metallic Waveguide at Submillimeter Wavelengths. In: 2017 10th UK-Europe-China Workshop on Milimetre Waves and Terahertz Technologies (UCMMT), Liverpool, UK, 11-13 Sep 2017, ISBN 9781538627204 (doi: 10.1109/UCMMT.2017.8068355)

2016

Votsi, H., Roch-Jeune, I., Haddadi, K., Li, C. , Dambrine, G., Aaen, P.H. and Ridler, N. (2016) Development of a Reference Wafer for On-Wafer Testing of Extreme Impedance Devices. In: 2016 88th ARFTG Microwave Measurement Conference (ARFTG), Austin, TX, USA, 08-09 Dec 2016, ISBN 9781509045150 (doi: 10.1109/ARFTG.2016.7839719)

Tian, Z., Huang, Y., Zu, Q., Loh, T.-H. and Li, C. (2016) Measurement of Absorption Cross Section of a Lossy Object in Reverberation Chamber Without the Need for Calibration. In: 2016 Loughborough Antennas & Propagation Conference (LAPC), Loughborough, UK, 14-15 Nov 2016, ISBN 9781509007844 (doi: 10.1109/LAPC.2016.7807533)

Khalid, A. , Cumming, D. , Clarke, R., Li, C. and Ridler, N. (2016) Evaluation of a VNA-based material characterization kit at frequencies from 0.75 THz to 1.1 THz. In: 2016 IEEE 9th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT), Qingdao, China, 05-07 Sep 2016, pp. 31-34. ISBN 9781509022779 (doi: 10.1109/UCMMT.2016.7873952)

Li, C. , Loh, T.-H., Humphreys, D. A., Gui, Y., Wang, H. and Qin, F. (2016) A LTE MIMO OTA Test System Using Vector Signal Transceivers. In: European Conference on Networks and Communications 2016, Athens, Greece, 27-30 June 2016,

Loh, T.-H., Li, C. , Wang, H. and Qin, F. (2016) A Software-Defined-Radio Platform for Multiple-Input-Multiple-Output Over-The-Air Measurement. In: 2016 10th European Conference on Antennas and Propagation (EuCAP), Davos, Switzerland, 10-15 Apr 2016, ISBN 9788890701863 (doi: 10.1109/EuCAP.2016.7481104)

2015

Li, C. , Loh, T.-H., Tian, Z. H., Xu, Q. and Huang, Y. (2015) A Comparison of Antenna Efficiency Measurements Performed in Two Reverberation Chambers Using Non-Reference Antenna Methods. In: 2015 Loughborough Antennas & Propagation Conference (LAPC), Loughborough, UK, 02-03 Nov 2015, ISBN 9781479989430 (doi: 10.1109/LAPC.2015.7366141)

Khalid, A.-u.-H. , Li, C. , Lok, L. B. and Cumming, D. R.S. (2015) Oscillation detection technique by using Vector Network Analyzer. Journal of Terahertz Science and Electronic Information Technology, 13(3), pp. 382-388.

2014

Papageorgiou, V., Khalid, A. , Li, C. , Steer, M. J. and Cumming, D. R.S. (2014) Integration techniques of pHEMTs and planar Gunn diodes on GaAs substrates. Solid-State Electronics, 102, pp. 87-92. (doi: 10.1016/j.sse.2014.06.006)

Maricar, M. I., Glover, J., Khalid, A. , Li, C. , Evans, G., Cumming, D. S.R. and Oxley, C. H. (2014) An AlGaAs/GaAs-based planar Gunn diode oscillator with a fundamental frequency operation of 120 GHz. Microwave and Optical Technology Letters, 56(10), pp. 2449-2451. (doi: 10.1002/mop.28606)

Maricar, M. I., Khalid, A. , Glover, J., Evans, G.A., Vasileious, P., Li, C. , Cumming, D. and Oxley, C.H. (2014) Extraction of second harmonic from the In0.57Ga0.47As planar Gunn diode using radial stub resonators. Solid-State Electronics, 99, pp. 38-40. (doi: 10.1016/j.sse.2014.05.011)

Papageorgiou, V., Khalid, A.-u.-H. , Li, C. and Cumming, D. R.S. (2014) Co-fabrication of planar Gunn diode and HEMT on InP substrate. IEEE Transactions on Electron Devices, 61(8), pp. 2779-2784. (doi: 10.1109/TED.2014.2331368)

Khalid, A. et al. (2014) Terahertz oscillations in an In_0.53Ga_0.47As submicron planar gunn diode. Journal of Applied Physics, 115(11), p. 114502. (doi: 10.1063/1.4868705)

Grant, J. , McCrindle, I.J.H., Li, C. and Cumming, D.R.S. (2014) Multispectral metamaterial absorber. Optics Letters, 39(5), pp. 1227-1230. (doi: 10.1364/OL.39.001227)

Wang, J., Wang, L., Li, C. , Alharbi, K., Khalid, A. and Wasige, E. (2014) W-band InP-based resonant tunnelling diode oscillator with milliwatt output power. In: 26th International Conference on Indium Phosphide and Related Materials, Montpelier, France, 11-15 May 2014, pp. 1-2. (doi: 10.1109/ICIPRM.2014.6880531)

2013

Grant, J. , Escorcia Carranza, I. , Li, C. , McCrindle, I. and Cumming, D. (2013) A monolithic resonant terahertz sensor element comprising a metamaterial absorber and micro-bolometer. Laser and Photonics Reviews, 7(6), pp. 1043-1048. (doi: 10.1002/lpor.201300087)

Li, C. , Grant, J. , Wang, J. and Cumming, D.S. (2013) A Nipkow disk integrated with Fresnel lenses for terahertz single pixel imaging. Optics Express, 21(21), pp. 24452-24459. (doi: 10.1364/OE.21.024452)

Ismaeel Maricar, M. et al. (2013) Planar gunn diode characterisation and resonators elements to realise oscillator circuits. In: International Conference on Advanced Nanomaterials and Emerging Engineering Technologies (ICANMEET-2013), Chennai, India, 24-26 Jul 2013, pp. 597-601. (doi: 10.1109/ICANMEET.2013.6609384)

Saha, S.C., Li, C. , Ma, Y., Grant, J.P. and Cumming, D.R.S. (2013) Fabrication of multilevel silicon diffractive lens at terahertz frequency. IEEE Transactions on Terahertz Science and Technology, 3(4), pp. 479-485. (doi: 10.1109/TTHZ.2013.2251929)

Wang, J., Wang, L., Li, C. and Wasige, E. (2013) 28 GHz MMIC resonant tunnelling diode oscillator of around 1mW output power. Electronics Letters, 49(13), pp. 816-818. (doi: 10.1049/el.2013.1583)

Li, C. , Lok, L.B., Khalid, A. , Papageorgiou, V., Grant, J. and Cumming, D.R.S. (2013) Millimeter-wave coplanar stripline power dividers. International Journal of Microwave and Wireless Technologies, 5(3), pp. 205-212. (doi: 10.1017/S1759078713000421)

Khalid, A. , Li, C. , Dunn, G.M. and Cumming, D.R.S. (2013) Multi-channel GaAs-based planar gunn diodes. In: 40th International Symposium on Compound Semiconductors, Kobe, Japan, 19-23 May 2013,

Khalid, A.-u.-H. , Li, C. , Papageorgiou, V., Pilgrim, N.J., Dunn, G.M. and Cumming, D. (2013) A 218-GHz second-harmonic multiquantum well GaAs-based planar Gunn diodes. Microwave and Optical Technology Letters, 55(3), pp. 686-688. (doi: 10.1002/mop.27393)

Khalid, A. et al. (2013) In_0.53Ga_0.47As planar Gunn diodes operating at a fundamental frequency of 164 GHz. IEEE Electron Device Letters, 34(1), pp. 39-41. (doi: 10.1109/LED.2012.2224841)

Li, C. , Lok, L.B., Khalid, A. , Papageorgiou, V., Grant, J. and Cumming, D. (2013) A coplanar ring power divider with high isolation for V-band and W-band applications. In: 42nd European Microwave Conference (EuMC), Amsterdam, The Netherlands, 29 Oct- 01 Nov 2012. IEEE: New York, NY, USA, pp. 57-60. ISBN 9781467322157

Papageorgiou, V., Khalid, A. , Li, C. , Dunn, G. M. and Cumming, D. R. S. (2013) The development of planar Gunn diodes for the realisation of MMIC oscillators. In: IET 1st Annual Active and Passive RF Devices Seminar, Glasgow, UK, 29 Oct. 2013, pp. 55-58. (doi: 10.1049/ic.2013.0248)

Papageorgiou, V., Khalid, A. , Steer, M. J., Li, C. and Cumming, D. R. S. (2013) Monolithic fabrication of a planar Gunn diode and a pHEMT side-by-side. In: ESSDERC/ESSCIRC 2013: 2013 European Solid-State Device Research and 2013 European Solid-State Circuits Conference, Bucharest, Romania, 16-20 Sept. 2013, pp. 111-114. (doi: 10.1109/ESSDERC.2013.6818831)

Papageorgiou, V., Khalid, A. , Steer, M. J., Li, C. and Cumming, D. R. S. (2013) Monolithic Implementation of a Planar Gunn Diode and a pHEMT. In: HETECH 2013: 22nd European Workshop on Heterostructure Technology, Glasgow, UK, 9-11 Sept. 2013, (Unpublished)

Papageorgiou, V., Khalid, A.H. , Li, C. and Cumming, D. (2013) Simulation and fabrication of InGaAs planar Gunn diode on InP substrate. In: 2013 International Conference on Indium Phosphide and Related Materials (IPRM), Kobe, Japan, 19-23 May 2013,

Wang, J., Wang, L., Li, C. , Cumming, D. and Wasige, E. (2013) Novel resonant tunnelling diode oscillator with high output power. In: UK Semiconductors 2013, Sheffield, UK, 3 - 4 Jul 2013,

2012

Li, C. , Khalid, A. , Papageorgiou, V., Lok, L.B. and Cumming, D.R.S. (2012) A wideband CPW ring power combiner with low insertion loss and high port isolation. IEEE Microwave and Wireless Components Letters, 22(11), pp. 580-582. (doi: 10.1109/LMWC.2012.2224854)

Khalid, A. , Li, C. , Grant, J. , Saha, S., Ferguson, S. and Cumming, D. (2012) Simple e-beam air-bridge technology for mm-wave applications. Microelectronic Engineering, 98, pp. 262-265. (doi: 10.1016/j.mee.2012.06.006)

Montes, M., Dunn, G., Stephen, A., Khalid, A. , Li, C. , Cumming, D. , Oxley, C.H., Hopper, R.H. and Kuball, M. (2012) Reduction of impact ionization in GaAs-based planar gunn diodes by anode contact design. IEEE Transactions on Electron Devices, 59(3), pp. 654-660. (doi: 10.1109/TED.2011.2177094)

2011

Li, C., Khalid, A. , Caldwell, S.H.P., Holland, M., Dunn, G.M., Thayne, I.G. and Cumming, D.R.S. (2011) Design, fabrication and characterization of In_0.23Ga_0.77As-channel planar Gunn diodes for millimeter wave applications. Solid-State Electronics, 64(1), pp. 67-72. (doi: 10.1016/j.sse.2011.07.008)

Li, C., Lok, L.B., Khalid, A. , Thayne, I.G. and Cumming, D.R.S. (2011) Investigation of loading effect on power performance for Planar Gunn diodes using load-pull measurement technique. IEEE Microwave and Wireless Components Letters, 21(10), pp. 556-558. (doi: 10.1109/LMWC.2011.2163496)

Hou, L. , Haji, M., Li, C. , Qiu, B.C. and Bryce, A.C. (2011) 80-GHz AlGaInAs/InP 1.55 mu m colliding-pulse mode-locked laser with low divergence angle and timing jitter. Laser Physics Letters, 8(7), pp. 535-540. (doi: 10.1002/lapl.201110029)

Li, C., Khalid, A. , Caldwell, S.H.P., Pilgrim, N.J., Holland, M.C., Dunn, G.M. and Cumming, D.R.S. (2011) Enhancement of power and frequency in Planar Gunn diodes by introducing extra delta-doping layers. Microwave and Optical Technology Letters, 53(7), pp. 1624-1626. (doi: 10.1002/mop.26071)

Li, C. , Khalid, A. , Lok, L.B. and Cumming, D. (2011) Novel on-wafer measurement technique for passive multiport devices in millimeter wave frequency range. In: 9th Millimeter-Wave User Group Meeting, Glasgow, UK, 31 March 2011, (Unpublished)

Khalid, A. , Li, C., Holland, M.C., Gunn, D.M. and Cumming, D.R.S. (2011) Novel composite contact design and fabrication for planar Gunn devices for millimeter-wave and terahertz frequencies. Physica Status Solidi C, 8(2), pp. 316-318. (doi: 10.1002/pssc.201000529)

Pilgrim, N.J., Khalid, A. , Li, C., Dunn, G.M. and Cumming, D.R.S. (2011) Contact shaping in planar Gunn diodes. Physica Status Solidi C, 8(2), pp. 313-315. (doi: 10.1002/pssc.201000539)

Hou, L. , Haji, M., Li, C. , Akbar, J., Marsh, J.H. and Bryce, A.C. (2011) 80-GHz AlGaInAs/InP 1.55 mu m colliding-pulse mode-locked laser with low divergence angle and timing jitter. In: Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, Munich, Germany, 22-26 May 2011, (doi: 10.1109/CLEOE.2011.5942606)

Khalid, A. , Li, C. , Grant, J. , Saha, S., Ferguson, S. and Cumming, D. (2011) A simple air bridge technology for mm-wave applications. In: 37th International Conference on Micro and Nano Engineering: MNE 2011, Berlin, 19 - 23 September 2011,

Li, C. , Lok, L.B., Khalid, A. and Cumming, D. (2011) A broadband circular combiner/divider for planar Gunn oscillators. In: 2nd Annual Passive RF and Microwave Components Seminar. The Institution of Engineering and Technology, pp. 15-20. ISBN 9781849193221 (doi: 10.1049/ic.2011.0196)

Li, C., Lok, L.B., Khalid, A. and Cumming, D.R.S. (2011) Coplanar ring divider with wideband high isolation performance. Progress in Electromagnetics Research Letters, 25, pp. 1-10.

2010

Khalid, A. , Li, C. and Cumming, D. (2010) Vertical scaling of multi-stack Planar Gunn diodes. 2010 International Semiconductor Conference (CAS), 2, pp. 427-430. (doi: 10.1109/SMICND.2010.5650562)

Li, C. , Khalid, A. , Lok, L. and Cumming, D. (2010) Low power signal detection in emerging transferred electron devices using vector network analyser above 100 GHz. In: 8th NPL Millimeter-wave Users's Group Meeting, London, UK, 1 Oct 2010,

Li, C. , Khalid, A. , Lok, L.B., Holland, M. and Cumming, D. (2010) Millimeter-wave planar Gunn diodes. In: UK Semiconductors 2010, Sheffield, UK, 7-8 Jul 2010, (Unpublished)

Khalid, A. , Li, C. , Pilgrim, N. J., Holland, M. C., Dunn, G. M. and Cumming, D. R. S. (2010) Novel Composite Contact Design and Fabrication for Planar Gunn Devices for Millimeter-Wave and Terahertz Frequencies. In: ISCS 2010: 37th International Symposium on Compound Semiconductors, Kagawa, Japan, 31 May - 4 June 2010,

Li, C., Khalid, A. , Lok, L.B., Pilgrim, N.J., Holland, M., Dunn, G.M. and Cumming, D. (2010) An In0.23Ga0.77As-based pHEMT-like Planar Gunn Diode Operating at 116 GHz. In: 35th International Conference on Infrared, Millimeter and Terahertz Waves, Rome, Italy, 5 - 10 September 2010,

Li, C. , Khalid, A. , Paluchowski Caldwell, S. H., Pilgrim, N. J., Holland, M. C., Dunn, G. M. and Cumming, D. R. S. (2010) Enhancement of Power and Frequency in HEMT-Like Planar Gunn Diodes by Introducing Extra Delta-Doping Layers. In: ISCS 2010: 37th International Symposium on Compound Semiconductors, Kagawa, Japan, 31 May - 4 June 2010,

Lok, L.B., Li, C., Khalid, A. , Pilgrim, N.J., Dunn, G.M. and Cumming, D. (2010) Demonstration of the Self-Mixing Effect with a Planar Gunn Diode at Millimeter-Wave Frequency. In: 35th International Conference on Infrared, Millimeter and Terahertz Waves, Rome, Italy, 5 -10 September 2010,

2009

Khalid, A. , Li, C., Dunn, G., Pilgrim, N. and Cumming, D.R.S. (2009) Observation of multiple domains in a planar Gunn diode. In: EuMC 2009: European Microwave Conference: 28 September - 2 October 2009, Rome, Italy. IEEE Computer Society: Piscataway, N.J., USA, pp. 298-300. ISBN 9781424447497

Li, C., Khalid, A. , Pilgrim, N., Holland, M.C., Dunn, G. and Cumming, D.R.S. (2009) Novel planar Gunn diode operating in fundamental mode up to 158 GHz. Journal of Physics: Conference Series, 193(1), 012029. (doi: 10.1088/1742-6596/193/1/012029)

This list was generated on Tue Mar 28 14:20:20 2023 BST.

Jump to: Articles | Book Sections | Research Reports or Papers | Conference or Workshop Item | Conference Proceedings

Number of items: 95.

Articles

Leitenstorfer, A. et al. (2023) The 2023 Terahertz Science and Technology Roadmap. Journal of Physics D: Applied Physics, (doi: 10.1088/1361-6463/acbe4c) (Early Online Publication)

Al-Moathin, A. et al. (2022) EML based on identical epitaxial layer, side-wall grating and HSQ planarization. IEEE Photonics Technology Letters, 34(6), pp. 317-320. (doi: 10.1109/LPT.2022.3155730)

Khalid, A. et al. (2014) Terahertz oscillations in an In_0.53Ga_0.47As submicron planar gunn diode. Journal of Applied Physics, 115(11), p. 114502. (doi: 10.1063/1.4868705)

Grant, J. , McCrindle, I.J.H., Li, C. and Cumming, D.R.S. (2014) Multispectral metamaterial absorber. Optics Letters, 39(5), pp. 1227-1230. (doi: 10.1364/OL.39.001227)

Wang, J., Wang, L., Li, C. and Wasige, E. (2013) 28 GHz MMIC resonant tunnelling diode oscillator of around 1mW output power. Electronics Letters, 49(13), pp. 816-818. (doi: 10.1049/el.2013.1583)

Khalid, A. et al. (2013) In_0.53Ga_0.47As planar Gunn diodes operating at a fundamental frequency of 164 GHz. IEEE Electron Device Letters, 34(1), pp. 39-41. (doi: 10.1109/LED.2012.2224841)

Pilgrim, N.J., Khalid, A. , Li, C., Dunn, G.M. and Cumming, D.R.S. (2011) Contact shaping in planar Gunn diodes. Physica Status Solidi C, 8(2), pp. 313-315. (doi: 10.1002/pssc.201000539)

Li, C., Lok, L.B., Khalid, A. and Cumming, D.R.S. (2011) Coplanar ring divider with wideband high isolation performance. Progress in Electromagnetics Research Letters, 25, pp. 1-10.

Khalid, A. , Li, C. and Cumming, D. (2010) Vertical scaling of multi-stack Planar Gunn diodes. 2010 International Semiconductor Conference (CAS), 2, pp. 427-430. (doi: 10.1109/SMICND.2010.5650562)

Book Sections

Research Reports or Papers

Conference or Workshop Item

Li, C. (2022) Advances in Leakage Corrections for On-wafer S-parameter Measurements. European Microwave Week 2022, Milan, Italy, 25-30 Sep 2022.

Cheng, H., Dhongde, A., Karami, K. , Reynolds, P. , Thoms, S. , Wasige, E. and Li, C. (2022) Reliable T-gate Process for THz HEMTs. UK Semiconductors 2022, Sheffield, UK, 6-7 July 2022.

Zhong, M., Cumming, D. and Li, C. (2022) Power Enhancement of Planar Gunn Oscillators Using Injection Locking. UK Semiconductors 2022, Sheffield, UK, 6-7 July 2022.

Li, C. (2022) Modelling and Correction of Probe-Probe Crosstalk at mm wave Frequencies. International Microwave Symposium 2022, Denver, CO, USA, 19-24 Jun 2022.

Conference Proceedings

Khalid, A. , Li, C. , Dunn, G.M. and Cumming, D.R.S. (2013) Multi-channel GaAs-based planar gunn diodes. In: 40th International Symposium on Compound Semiconductors, Kobe, Japan, 19-23 May 2013,

Wang, J., Wang, L., Li, C. , Cumming, D. and Wasige, E. (2013) Novel resonant tunnelling diode oscillator with high output power. In: UK Semiconductors 2013, Sheffield, UK, 3 - 4 Jul 2013,

Li, C. , Khalid, A. , Lok, L.B., Holland, M. and Cumming, D. (2010) Millimeter-wave planar Gunn diodes. In: UK Semiconductors 2010, Sheffield, UK, 7-8 Jul 2010, (Unpublished)

This list was generated on Tue Mar 28 14:20:20 2023 BST.

Grants

Current grants

"Digitally tunable microwave metamaterials", DASA, PI (reputidated)

"EPSRC (UK) and DFG (Germany) joint workshop on THz integration technologies", EPSRC, Travel grant, Oct 2022

"Wireless Controls and Readouts for Qubit Upscaling (WiQC)", EPSRC EP/X017613/1, 10.2022-06.2024, PI, £200k

"Empowering Practical Interfacing of Quantum Computing (EPIQC)", EPSRC EP/W032627/1, 04.2022-03.2026, CoI, £3M

"Millimetre-wave and Terahertz On-chip Circuit Test Cluster for 6G Communications and Beyond (TiC6G)", EPSRC EP/W006448/1 ,01.2022-12.2023, Internal lead, £2.62M

"GaN Smart Power Integrated Circuit Techonlogy (GaN SPICe)", EPSRC EP/V026127/1, 10.2021-09.2024, CoI, £502k

"Integrated GaN-Diamond Microwave Electronics: From Materials, Transistors to MMICs (GaN_DaME)", EPSRC EP/P00945X/1, 01.2017(2020)-03.2023, GU PI, £4.3M

"Development of multi-physical on-wafer test capabilities for advanced communications and quantum technologies", industrial PhD scholarship, 04.2022-11.2026, PI

"EMC tests on CubeSats", Commericial, 01.2021-12.2025, PI

Past Projects

"Solar-Hydro power project", InnovateUK Energy Catalyst R7, TS/S021582/1, 04.2020-08.2021, PI, £300k

"Dielectric materials for 5G base station", 2020, PI

"Picosatellite antennae", Commericial, 2019, PI

"RFID for tracking livestocks", Scottish Agricultural Organisation Society Ltd. 2019, PI

"Multiphysical millimeter-wave probe station", EPSRC, ECR small equipment grant, 2019, PI

"Hybrid solar-hydro freasibility studies", Global Challenges Research Fund, 2018, PI

"Millimetre-wave on-wafer power and S-parameter measurements", Commercial, 2018-2019, PI

Horizon2020 PlanarCal (€1.8M) 2015-2018, WP leader

Horizon2020 MET5G (€1.6M) 2015-2018, Researcher

Horizon2020 MORSE (€2.4M) 2013-2016, Researcher

DECC DGO2 (£0.9M) 2014, WP leader

Supervision

Visiting Scholars:
Dr. Shimul Saha, Mr. Chen Liu, Ms Yi Wang
PDRAs:

Ali Al Mothian, "Wireless interfacing for quantum computer systems"

Qusay Raghib Ali Al-Taai, "MMICs and materials using GaN on diamond"

Ajay Beniwal, Marie Curie Early Stage Reseracher "DETECT"

Current PhD students:

M. Farage (writing up) "W-band frequency scanning antennas" (1st supervisor)

Y. Yi (12.2018-) "Graphene-based terahertz tunable modulators" (1st supervisor)

J. Wang (10.2019-) "Terahertz transistors and power amplifiers" (1st supervisor)

H. Cheng (10.2019-) "Monolithic Integrated Circuits for Terahertz Communications" (1st supervisor)

M. Zhong (02.2020-) "Nonlinear electronic THz detectors" (1st supervisor)

Y. Ma (11.2020-) "Hybrid RF/Ulstrasound energy harvester" (1st supervisor)

V. Kukanja (10.2021-) "Metamaterials for biomedical applications" (1st supervisor)

Q. Li (11.2021-) "AI-driven design for transistors and LNAs" (1st supervisor)

Y. Jiang (03.2022-) "Advanced antennas for future wireless communications" (1st supervisor)

J. Kelly (04.2022-) "Development of multi-physical on-wafer test capabilities for advanced communications and quantum technologies" (1st supervisor)

E. M. Khusna (02.2023-) "On-Chip Antenna based on Spoof Surface Plasmon Polaritons (SSPP) for Commercial THz Systems" (1st supervisor)

A. Dhongde (11.2018-) "W-band GaN power amplifiers" (2nd supervisor, with Prof. Edward Wasige)

F. Wu (9.2021-) "MIR detector arrays" (2nd supervisor, with Prof. David Cumming)

Q. Guo (9.2021-) " "(2nd supervisor, with Prof. David Moran)

J. Johny (10.2022-) "" (2nd supervisor, with Prof. David Moran)

Funding opportunities

A fascinating 3.5-year PhD Scholarship is now available in the field of 6G wireless communications and Quantum computers. More details can be found here (https://www.findaphd.com/phds/project/phd-in-engineering-development-of-multi-physical-on-wafer-test-capabilities-for-advanced-communications-and-quantum-technologies/?p136269 )

https://www.gla.ac.uk/postgraduate/doctoraltraining/

Iloke, Joel Idor
Prediction for Additive Manufacturing Resource Consumption and Mechanical Properties and the Multi-Objective Optimisation Approach
Jiang, Yunan
Intelligent metasurface for advanced applications
Johny, Jestin
Evaluation of Ultrawide Bandgap semiconductors for high performance electronics
Wu, Shuhao
MIR metamaterials for imaging applications using InSb detector

Former PDRAs and PhD students:
Andrew Scott-George 2020-2021

Connor Munro 2020-2021

Haris Votsi 2015 (Surrey)

Former visiting scholars:

2019: Dr. Ying Wang (Northwestern Polytechnical University)

2016-2017: Mr. Aihua Wu, HSRI，Mr. Chen Liu, HSRI

Teaching

Current

ENG4100 Microwave & Optical Transmission System (since 2023)
ENG3023 Electromagnetic Compatibility (coordinator) (since 2021)
ENG5056 Microwave and Millimeter-wave Circuit Design (since 2017)

Past

ENG3043 Real-time Computer Systems (coordinator) (2017-2022)

Professional activities & recognition

Editorial boards

2017: Royal Society Open Science

Professional & learned societies

2018 - 2021: Member of General Assembly, European Microwave Association
2019 - 2021: Chair of Workshops and Short Courses, European Microwave 2021
2017: Senior Member, IEEE (The Institute of Electrical and Electronics Engineers)
2018: Member, IET (The Institution of Engineering and Technology)

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