a Lecturer in High Frequency Engineering at Cardiff University with a special focus on microwave-accelerated interdisciplinary research. My research covers microwave integrated and discrete circuits, resonators, and high power amplifiers in the frequency range from 1 Hz up to 120 GHz.
RF/Microwave power amplifiers and applicators design, for efficient microwave power generation and delivery, and mmWave on-wafer device characterisation of GaN on Si, GaN on SiC, and GaN on Diamond transistors.
COMSOL Multiphysics electromagnetic modelling, of microwave circuit design, dielectric sensing and heating problems.
Biography
Education and qualifications
2011: PhD Linear RF/Microwave High Power Amplifier, Chonbuk National University, Jeonju, Republic of Korea
2006: MSc Information and Communication Engineering, Chonbuk National University, Jeonju, Republic of Korea
2004: BSc Electronics and Information Engineering, Chonbuk National University, Jeonju, Republic of Korea
Career overview
2021-present: Lecturer in High Frequency Engineering
2020-2021: As a Sêr Cymru (Star of Wales) Research Fellow at the Centre for High Frequency Engineering, Cardiff University, I am currently working on a GaN-GaME (Gallium Nitride on Diamond) project funded by EPSRC as a collaboration of University of Bristol, University of Cambridge, University of Glasgow, and University of Birmingham.
2017-2020: I have worked as a Sêr Cymru (Star of Wales) Research Fellow at the Centre for High Frequency Engineering, Cardiff University, pursuing commercialisation of the microwave non-invasive blood glucose monitoring sensor with an industrial collaborator.
2013-2016: I have worked on the development of non-invasive continuous blood glucose monitoring sensor, funded by Wellcome Trust. This includes development of microwave wireless wearable sensor device and a series of clinical trials.
2011-2012: I have worked on the development of active harmonic load-pull system for modulated RF waveform using National Instruments’ PXI-based modular instruments by using LabVIEW. With the project funded by Engineering and Physical Sciences Research Council (EPSRC), I had two successful live demonstrations at the exhibition of National Instruments stand (Booth no. 317) in European Microwave Conference 2012 in Amsterdam, and Radio and Wireless Week 2013 in Austin, TX.
Honours and awards
2018 International Symposium on Information Technology Convergence 2018: Best Paper Award, Jeonju, Republic of Korea
2016 GE Healthcare Life Sciences - Sensors Challenge (sponsored by GE Healthcare Life Science): Phase 1 Winner with "Non-invasive Microwave Sensor for Cell Therapeutics"
2016 SET for BRITAIN Awards 2016 (sponsored by the UK government): Finalist in Engineering category with “Bloodless, Painless, and Accurate Microwave Continuous Blood Glucose Monitoring Sensor”
2010 16th Human Tech Thesis Prize Awards (sponsored by Samsung Electronics): Honor Prize with “Efficiency Enhancement of Feedforward Amplifiers by Employing a Negative Group Delay Circuit”
2009 8th Electromagnetic Wave and Broadcasting Paper Contest (sponsored by the Korean Institute of Electromagnetic Engineering Science): Silver Prize with “Efficiency Enhancement of Feed-forward Amplifiers by Employing a Negative Group Delay Circuit”
2008 Research achievement contest in 2008 Chonbuk IT-Open Fair (sponsored by Advanced Graduate Education Center of Chonbuk for Electronics and Information Technology-BK21): Creative Research Award with “Digital Controlled Co-channel Feedback Interference Cancellation System with Broadband Cancellation”
2008 Student High-Efficiency Power Amplifier Design Competition (sponsored by IEEE MTT-S High Power Amplifier Components Committee): Outstanding Achievement Award with “class-AB power amplifier with 68% PAE at 2.14 GHz”
2006 5th Electromagnetic Wave and Broadcasting Paper Contest (sponsored by the Korean Institute of Electromagnetic Engineering Science): Bronze Prize with “Dual-band Feedforward Linear Power Amplifier Using Equal Group Delay Signal Canceller”
Co-Guest Editor, MDPI SENSORS, special issue on "RF, Microwave and mm Wave Sensors and Applicators for Chemical, Biological and Medical Applications", 2018 (https://goo.gl/tbYFu2)
International conference organisation
Session Convener, Europe-Korea Conference on Science and Technology 2022, Marseille, France (https://ekc2022.org/)
Science and Technology Programme Committee, Europe-Korea Conference on Science and Technology 2020, Munich, Germany (http://www.ekc2020.org, cancelled due to Covid-19)
The aim of my research is to improve quality of life of people, therefore I focus primarily on the translation of laboratory-based technology into real-world application, through feasibility test, scaling up and commercialisation.
I am available to supervise PhD, MSc students, project students (undergraduate and postgraduate), interns and visiting students on the following topics:
Microwave non-invasive sensing problems
Microwave dielctric characterisation and sensing
Microwave resonators and cavity perturbation technique
