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Stephen, Jordan, Jeffs, Spencer, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2025. Dielectric property measurement of a SiCf/SiC Ceramic Matrix Composite via microwave cavity characterisation. Open Ceramics 23 , 100818. 10.1016/j.oceram.2025.100818
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Miles, A., Porch, A. ORCID: https://orcid.org/0000-0001-5293-8883, Choi, H. ORCID: https://orcid.org/0000-0003-1108-293X, Cripps, S. ORCID: https://orcid.org/0000-0002-2258-951X, Brown, H. and Williams, C. F. ORCID: https://orcid.org/0000-0001-8619-2581 2025. Direct measurement of non-thermal microwave effects on bacterial growth and redox dynamics using a novel high-throughput waveguide applicator. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 383 (2297) , 20240073. 10.1098/rsta.2024.0073
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Jones, Jake, Jones, Nick, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Cripps, Steve ORCID: https://orcid.org/0000-0002-2258-951X and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2025. A novel microwave applicator for large volume metal powder heating in additive manufacturing. Presented at: APMC 2024, Bali, Indonesia, 17-20 November 2024. 2024 IEEE Asia-Pacific Microwave Conference (APMC). IEEE, pp. 1302-1304. 10.1109/apmc60911.2024.10867661

Silver, Kai, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Cripps, Steve C. ORCID: https://orcid.org/0000-0002-2258-951X, Smith, Ron, Jones, Martin O., Richards, Emma ORCID: https://orcid.org/0000-0001-6691-2377 and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2025. A novel miniaturized benchtop EPR spectrometer based on sideband detection using a software-defined radio. Presented at: APMC 2024, Bali, Indonesia, 17-20 November 2024. 2024 IEEE Asia-Pacific Microwave Conference (APMC). IEEE, pp. 814-816. 10.1109/apmc60911.2024.10867565
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Kazieczko, Dominika, Weiss, Maxime, Gouyet, Bettina, Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 and Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X 2025. Dielectric tissue phantom fabrication and automated compression test system for non-invasive blood glucose monitor. Presented at: European Microwave Week 2025, Utrecht, The Netherlands, 21-26 September 2025.
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Silver, Kai, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Cripps, Steve C. ORCID: https://orcid.org/0000-0002-2258-951X, Smith, Ron, Jones, Martin O., Richards, Emma, Murphy, Damien ORCID: https://orcid.org/0000-0002-5941-4879 and Porch, Adrian 2025. Design considerations for an electron paramagnetic resonance spectrometer for simultaneous epr and neutron diffraction. Presented at: AMPERE 2025 20th Inttetional Conference on Microwave and High Frequency Applications, Bari, Italy, 15-19 September 2025.
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Silver, Kai, Bestow, S, Richardson, J, Nagara, C, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X and Li, Jin ORCID: https://orcid.org/0000-0002-4672-6806 2024. Microwave resonator-based microfluidic sensors fabricated using 3D-printing technology. Presented at: Cardiff University Engineering Research Conference 2023, Cardiff, UK, 12-14 July 2023. Published in: Spezi, Emiliano and Bray, Michaela eds. Proceedings of the Cardiff University Engineering Research Conference 2023. Cardiff: Cardiff University Press, pp. 109-112. 10.18573/conf1.z
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Lingamgunta, Swetha, Xiao, Yao, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Christie, Graham and Fruk, Ljiljana 2024. Microwave-enhanced antibacterial activity of polydopamine–silver hybrid nanoparticles. RSC Advances 14 , pp. 8331-8340. 10.1039/d3ra07543e
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Jones, Dafydd, Cripps, Steve ORCID: https://orcid.org/0000-0002-2258-951X, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Perks, Richard ORCID: https://orcid.org/0000-0003-0873-0537, Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 and Brown, Phill 2024. Novel oscillator for use in near-field microwave microscopy. Presented at: Asia-Pacific Microwave Conference (APMC), 05-08 December 2023. Proceedings 2023 Asia-Pacific Microwave Conference (APMC). IEEE, pp. 829-831. 10.1109/APMC57107.2023.10439775

Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Luzio, Steve and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2024. Microwave non-invasive blood glucose monitor: Wireless implementation and challenges. Presented at: 54th European Microwave Conference (EuMC), Paris, France, 24-26 September 2024. 2024 54th European Microwave Conference (EuMC). IEEE, pp. 493-496. 10.23919/eumc61614.2024.10732840

Jones, D. R., Brown, P., McFarland, G., Perks, R. ORCID: https://orcid.org/0000-0003-0873-0537, Choi, H. ORCID: https://orcid.org/0000-0003-1108-293X, Cripps, S. ORCID: https://orcid.org/0000-0002-2258-951X and Porch, A. ORCID: https://orcid.org/0000-0001-5293-8883 2023. Near-field microwave microscopy for 3D surface assessment of manufactured structures. IEEE Journal of Microwaves 3 (3) , pp. 962-969. 10.1109/JMW.2023.3261901
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Williams, Catrin F. ORCID: https://orcid.org/0000-0001-8619-2581, Hather, Catherine, Conteh, Jainaba Sallah, Zhang, Jingjing, Popa, Raluca G., Owen, Anthony W., Jonas, Cara L., Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Daniel, Rhian M. ORCID: https://orcid.org/0000-0001-5649-9320, Lloyd, David ORCID: https://orcid.org/0000-0002-5656-0571, Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 and George, Christopher H. 2023. Non-thermal disruption of β-adrenergic receptor-activated Ca2+ signalling and apoptosis in human ES-derived cardiomyocytes by microwave electric fields at 2.4 GHz. Biochemical and Biophysical Research Communications 661 , pp. 89-98. 10.1016/j.bbrc.2023.04.038
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Sauchelli, Sarah, Pickles, Tim ORCID: https://orcid.org/0000-0001-7743-0234, Voinescu, Alexandra, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Sherlock, Ben, Zhang, Jingjing, Colyer, Steffi, Grant, Sabrina, Sundari, Sethu and Lasseter, Gemma 2023. Public attitudes towards the use of novel technologies in their future healthcare: a UK survey. BMC Medical Informatics and Decision Making 23 , 38. 10.1186/s12911-023-02118-2
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Magri, Giuseppina, Barter, Michael ORCID: https://orcid.org/0000-0002-4404-9397, Fletcher-Charles, Jack, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Slocombe, Daniel ORCID: https://orcid.org/0000-0003-3590-6075, Richards, Emma ORCID: https://orcid.org/0000-0001-6691-2377, Folli, Andrea ORCID: https://orcid.org/0000-0001-8913-6606, Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 and Murphy, Damien M. ORCID: https://orcid.org/0000-0002-5941-4879 2023. An in-situ study of the thermal decomposition of 2,2'-azobis(2-methylpropionitrile) radical chemistry using a dual-mode EPR resonator. Research on Chemical Intermediates 49 , pp. 289-305. 10.1007/s11164-022-04861-z
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Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Barker, Emilia, Abduljabar, Ali A., Anumba, Dilly and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2022. Cervical tissue hydration level monitoring by a resonant microwave coaxial probe. Sensors 22 (23) , 9527. 10.3390/s22239527
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Barter, Michael ORCID: https://orcid.org/0000-0002-4404-9397, Magri, Giuseppina, Harari, Jaafar, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Folli, Andrea ORCID: https://orcid.org/0000-0001-8913-6606, Slocombe, Daniel R. ORCID: https://orcid.org/0000-0003-3590-6075, Richards, Emma ORCID: https://orcid.org/0000-0001-6691-2377, Murphy, Damien M. ORCID: https://orcid.org/0000-0002-5941-4879 and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2022. Design considerations of a dual mode X-band EPR resonator for rapid in-situ microwave heating. Applied Magnetic Resonance 53 , pp. 861-874. 10.1007/s00723-022-01463-1
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Riedel, R., Seel, A. G., Malko, D., Miller, D. P., Sperling, B. T., Choi, H. ORCID: https://orcid.org/0000-0003-1108-293X, Headen, T., Zurek, E., Porch, A. ORCID: https://orcid.org/0000-0001-5293-8883, Kucernak, A., Pyper, N. C., Edwards, P .P. and Barrett, A. G. M. 2021. Superalkali-alkalide interactions and ion pairing in low-polarity solvents. Journal of the American Chemical Society 143 (10) , pp. 3934-3943. 10.1021/jacs.1c00115
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Ahortor, Evans K. ORCID: https://orcid.org/0000-0002-3885-1017, Malyshev, Dmitry, Williams, Catrin F. ORCID: https://orcid.org/0000-0001-8619-2581, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 and Baillie, Les ORCID: https://orcid.org/0000-0002-8186-223X 2020. The biological effect of 2.45 GHz microwaves on the viability and permeability of bacterial and yeast cells. Journal of Applied Physics 127 (204902) , IMPORTED. 10.1063/1.5145009
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Folli, Andrea ORCID: https://orcid.org/0000-0001-8913-6606, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Barter, Michael ORCID: https://orcid.org/0000-0002-4404-9397, Harari, Jaafar, Richards, Emma ORCID: https://orcid.org/0000-0001-6691-2377, Slocombe, Daniel ORCID: https://orcid.org/0000-0003-3590-6075, Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 and Murphy, Damien M. ORCID: https://orcid.org/0000-0002-5941-4879 2020. A novel dual mode X-band EPR resonator for rapid in situ microwave heating. Journal of Magnetic Resonance 310 , 106644. 10.1016/j.jmr.2019.106644
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Hamzah, H., Ahortor, E. ORCID: https://orcid.org/0000-0002-3885-1017, Malyshev, D., Choi, H. ORCID: https://orcid.org/0000-0003-1108-293X, Lees, J. ORCID: https://orcid.org/0000-0002-6217-7552, Baillie, L. ORCID: https://orcid.org/0000-0002-8186-223X and Porch, A. ORCID: https://orcid.org/0000-0001-5293-8883 2019. A compact microwave applicator for the rapid detection of clostridium difficile. Presented at: 2019 IEEE MTT-S International Microwave Biomedical Conference (IMBioC), Nanjing, China, 6-8 May 2019. 2019 IEEE MTT-S International Microwave Biomedical Conference (IMBioC). IEEE, 10.1109/IMBIOC.2019.8777882
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Williams, Catrin F. ORCID: https://orcid.org/0000-0001-8619-2581, Geroni, Gilles M., Lloyd, David ORCID: https://orcid.org/0000-0002-5656-0571, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Clark, Nicholas ORCID: https://orcid.org/0000-0002-5306-0993, Pirog, Antoine, Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552 and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2019. Bioluminescence of Vibrio fischeri: bacteria respond quickly and sensitively to pulsed microwave electric (but not magnetic) fields. Journal of Biomedical Optics 24 (5) , 051412. 10.1117/1.JBO.24.5.051412
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Abduljabar, Ali A., Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2019. Novel variable coupling technique for microwave liquid heating and sensing. Presented at: 18th Mediterranean Microwave Symposium (MMS) 2018, Istanbul, Turkey, 31 October - 2 November 2018. 18th Mediterranean Microwave Symposium (MMS) 2018. IEEE, -. 10.1109/MMS.2018.8612033
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Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Luzio, Stephen, Beutler, Jan and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2018. Microwave noninvasive blood glucose monitoring sensor: penetration depth and sensitivity analysis. Presented at: IEEE MTT-S International Microwave Biomedical Conference 2018, Philadelphia, PA, US, 14-15 Jun 2018. IEEE International Microwave Biomedical Conference (IMBioC). IEEE, pp. 52-54. 10.1109/IMBIOC.2018.8428850
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Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X 2017. Recent developments in minimally and truly non-invasive blood glucose monitoring techniques. Presented at: IEEE Sensors 2017, Glasgow, Scotland, 29 October - 1 November 2017. 2017 IEEE Sensors Conference Proceedings. IEEE, pp. 1-3. 10.1109/ICSENS.2017.8234291
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Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Luzio, Stephen, Beutler, Jan and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2017. Microwave noninvasive blood glucose monitoring sensor: human clinical trial results. Presented at: IEEE MTT-S International Microwave Symposium 2017, Honolulu, Hawaii, USA, 4 - 9 June 2017. Microwave Symposium (IMS), 2017 IEEE MTT-S International. pp. 876-879. 10.1109/MWSYM.2017.8058721
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Abduljabar, A.A., Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2017. Dual feeding cavity resonator for efficiency enhancement in liquid heating applications. Electronics letters 10.1049/el.2017.2557
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Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Luzio, Steve and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2016. Dielectric properties of aqueous glucose solutions using microwave cavity and coaxial probe. Presented at: 2nd Australian Microwave Symposium, Adelaide, Australia, 11-12 February 2016. 2016 IEEE 2nd Australian Microwave Symposium (AMS 2016). Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), pp. 7-8. 10.1109/AUSMS.2016.7593467

Abduljabar, Ali, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Barrow, David ORCID: https://orcid.org/0000-0003-2096-7262 and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2015. Adaptive coupling of resonators for efficient microwave heating of microfluidic systems. IEEE Transactions on Microwave Theory and Techniques 63 (11) , pp. 3681-3690. 10.1109/TMTT.2015.2478004
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Imtiaz, Azeem, Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X and Joshi, Lovleen Tina 2015. An integrated continuous class-F-1 mode power amplifier design approach for microwave enhanced portable diagnostic applications. IEEE Transactions on Microwave Theory and Techniques 63 (10) , pp. 3007-3015. 10.1109/TMTT.2015.2472417
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Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Naylon, Jack, Luzio, Steve, Buetler, Jan, Birchall, James ORCID: https://orcid.org/0000-0001-8521-6924, Martin, Chris and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2015. Design and in vitro interference test of microwave noninvasive blood glucose monitoring sensor. IEEE Transactions on Microwave Theory and Techniques 63 (10) , pp. 3016-3025. 10.1109/TMTT.2015.2472019
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Imtiaz, Azeem, Hartley, Jon, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X and Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552 2015. A high power high efficiency integrated solid-state microwave heating structure for portable diagnostic healthcare applications. Presented at: IEEE MTT-S 2014 IEEE International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications, London, 8-10 December 2014. 2014 IEEE MTT-S international microwave workshop series on RF and wireless technologies for biomedical and healthcare applications (IMWS-Bio). IEEE, pp. 1-3. 10.1109/IMWS-BIO.2014.7032437

Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jack, Naylon, Luzio, Stephen, Beutler, Jan and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2015. Design of continuous non-invasive blood glucose monitoring sensor based on a microwave split ring resonator. Presented at: IEEE MTT-S 2014 IEEE International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications, London, 8-10 December 2014. 2014 IEEE MTT-S International Microwave Workshop series on RF and wireless technologies for biomedical and healthcare applications (IMWS-Bio). IEEE, pp. 1-3. 10.1109/IMWS-BIO.2014.7032398

Cuenca, Jerome ORCID: https://orcid.org/0000-0003-1370-1167, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Hartley, Jon and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2014. Microwave detection of photodielectric effects in antimony tin oxide. Presented at: 2014 International Symposium on Information Technology Convergence (ISITC 2014), Jeonju, Republic of Korea, 30-31 October 2014.

Hartley, Jon, Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Cuenca, Jerome ORCID: https://orcid.org/0000-0003-1370-1167 and Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X 2014. Assessment of machine oil quality by microwave cavity perturbation method. Presented at: 2014 International Symposium on Information Technology Convergence (ISITC 2014), Jeonju, Republic of Korea, 30-31 October 2014.

Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Cuenca, Jerome ORCID: https://orcid.org/0000-0003-1370-1167, Hartley, Jon and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2014. Observation of change in microwave properties during solid to liquid phase transformation of gallium. Presented at: 2014 International Symposium on Information Technology Convergence (ISITC 2014), Jeonju, Republic of Korea, 30-31 October 2014.

Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Cuenca, Jerome A. ORCID: https://orcid.org/0000-0003-1370-1167, Attard, Gary and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2014. A novel concentration detection method of hydrogen peroxide using microwave cavity perturbation technique. Presented at: 44th European Microwave Conference (EuMC) 2014, Rome, Italy, 6-9 October 2014. 44th European Microwave Conference (EuMC 2014). Picastaway, NJ: IEEE, pp. 632-635. 10.1109/EuMC.2014.6986513

Yang, F., Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Yu, H. and Tasker, Paul J. ORCID: https://orcid.org/0000-0002-6760-7830 2014. Continuous class BJ power amplifier with DGS output matching. Presented at: 83rd ARFTG Microwave Measurement Conference 2014, Tampa, USA, 6 June 2014. Microwave Symposium (IMS), 2014 IEEE MTT-S International. IEEE, pp. 1-4. 10.1109/MWSYM.2014.6848562

Yusoff, Zubaida, Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Chaudhary, Muhammad Akmal, Carrubba, Vincenzo, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Tasker, Paul J. ORCID: https://orcid.org/0000-0002-6760-7830 and Cripps, Stephen Charles ORCID: https://orcid.org/0000-0002-2258-951X 2013. Simple and low-cost tracking generator design in envelope tracking radio frequency power amplifier system for WCDMA applications. IET Microwaves, Antennas & Propagation 7 (10) , pp. 802-808. 10.1049/iet-map.2013.0091

Bensmida, Souheil, Morris, Kevin A., Beach, Mark, McGeehan, Joe P., Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Akmal, Muhammad, Benedikt, Johannes ORCID: https://orcid.org/0000-0002-9583-2349 and Tasker, Paul J. ORCID: https://orcid.org/0000-0002-6760-7830 2012. Nonlinear envelope tracking for efficiency optimization of power amplifiers. Presented at: 7th European Microwave Integrated Circuits Conference (EuMIC) 2012, Amsterdam, The Netherlands, 29-30 October 2012. 7th European Microwave Integrated Circuits Conference (EuMIC), 2012. Picastaway, NJ: IEEE, pp. 480-483.

McGenn, William, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Uren, Michael J., Benedikt, Johannes ORCID: https://orcid.org/0000-0002-9583-2349 and Tasker, Paul J. ORCID: https://orcid.org/0000-0002-6760-7830 2012. Development of a RF waveform stress test procedure for GaN HFETs subjected to infinite VSWR sweeps. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest, Montreal, Canada, 17-22 June 2012. Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. IEEE, pp. 1-3. 10.1109/MWSYM.2012.6259725

Chaudhary, Girdhari, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae, Lim, Jongsik and Kim, Chul Dong 2012. Design of group delay time controller based on a reflective parallel resonator. Etri Journal 34 (2) , pp. 210-215.

Akmal, Muhammad, Ogboi, Friday Lawrence, Yusoff, Zubaida Binti, Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Carrubba, Vincenzo, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Bensmida, S., Morris, K., Beach, M., McGeehan, J., Benedikt, Johannes ORCID: https://orcid.org/0000-0002-9583-2349 and Tasker, Paul J. ORCID: https://orcid.org/0000-0002-6760-7830 2012. Characterization of electrical memory effects for complex multi-tone excitations using broadband active baseband load-pull. Presented at: 7th European Microwave Integrated Circuits Conference, Amsterdam, The Netherlands, 29-30 October 2012. 7th European Microwave Integrated Circuits Conference (EuMIC), 2012. Proceedings of the 7th European Microwave Integrated Circuits Conference. Picastaway, NJ: IEEE, pp. 885-888.

Chaudhary, Girdhari, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae, Lim, Jongsik, Kim, Dongsu and Kim, Jun-Chul 2011. Design of dual-band bandpass filter using DGS with controllable second passband. IEEE Microwave and Wireless Components Letters 21 (11) , pp. 589-591. 10.1109/LMWC.2011.2167140

Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae, Lim, Jongsik, Eom, Soon-Young and Jung, Young-Bae 2011. A novel design for a dual-band negative group delay circuit. IEEE Microwave and Wireless Components Letters 21 (1) , pp. 19-21. 10.1109/LMWC.2010.2089675

Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Chaudhary, Girdhari, Moon, Taesu, Jeong, Yongchae, Lim, Jongsik and Kim, Chul Dong 2011. A design of composite negative group delay circuit with lower signal attenuation for performance improvement of power amplifier linearization techniques. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011. 2011 IEEE MTT-S International Microwave Symposium Digest (MTT). Picastaway, NJ: IEEE, pp. 1-4. 10.1109/MWSYM.2011.5972599

Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae, Kim, Chul Dong and Kenney, James Stevenson 2010. Bandwidth enhancement of an analog feedback amplifier by employing a negative group delay circuit. Progress In Electromagnetics Research 105 , pp. 253-272. 10.2528/PIER10041808

Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae, Kim, Chul Dong and Kenney, J. Stevenson 2010. Efficiency enhancement of feedforward amplifiers by employing a negative group-delay circuit. IEEE Transactions on Microwave Theory and Techniques 58 (5) , pp. 1116-1125. 10.1109/TMTT.2010.2045576

Jeong, Y., Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X and Kim, C. D. 2010. Experimental verification for time advancement of negative group delay in RF electronic circuits. Electronics letters 46 (4) , pp. 306-307. 10.1049/el.2010.3147

Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Song, Kyungju, Jeong, Yongchae, Kenney, J. S. and Kim, Chul Dong 2009. Propagation delay matched CMOS 0.18 μm frequency doubler for L-band application. Microwave and Optical Technology Letters 51 (7) , pp. 1729-1732. 10.1002/mop.24420
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Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Lim, J. and Jeong, Y. 2009. Harmonics terminated L-band frequency quadrupler using composite right/left-handed transmission line. Electronics letters 45 (4) , pp. 208-210. 10.1049/el:20093331
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Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae, Kenney, J. S. and Kim, Chul Dong 2009. Dual-band feedforward linear power amplifier for digital cellular and IMT-2000 base-station. Microwave and Optical Technology Letters 51 (4) , pp. 922-926. 10.1002/mop.24198
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Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae, Kenney, James Stevenson and Kim, Chul-Dong 2008. Cross cancellation technique employing an error amplifier [Letter]. IEEE Microwave and Wireless Components Letters 18 (7) , pp. 488-490.
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Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Kenney, James Stevenson, Jeong, Yongchae and Kim, Chul-Dong 2008. Design of a microwave group delay time adjuster and its application to a feedforward power amplifier. Microwave Journal 51 (2) , pp. 88-100.
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Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Song, Kyungju, Kim, Chul Dong and Jeong, Yongchae 2008. Synthesis of negative group delay time circuit. Presented at: 2008 Asia- Pacific Microwave Conference, Macau, China, 16-20 December 2008. 2008 Asia- Pacific Microwave Conference APMC 2008. Picastaway: IEEE, pp. 1-4. 10.1109/APMC.2008.4958248

Song, Kyungju, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Kim, Chul Dong, Kenney, J. S. and Jeong, Yongchae 2008. Delay matching compensated CMOS microwave frequency doubler. Presented at: 38th European Microwave Conference 2008, Amsterdam, The Netherlands, 27-31 October 2008. 38th European Microwave Conference 2008. Picastaway: IEEE, pp. 464-467. 10.1109/EUMC.2008.4751489

Song, Kyungju, Jeong, Yongchae and Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X 2008. Varactor tunned high-Q aictive inductor with broadband tuning range. Presented at: International SoC Design Conference, Busan, South Korea, 24-25 November 2008. 2008 International Soc Design Conference (Isocc). Picastaway, NJ: IEEE, III-42. 10.1109/SOCDC.2008.4815740

Park, Sangkeun, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X and Jeong, Yongchae 2007. Microwave group delay time adjuster using parallel resonator. IEEE Microwave and Wireless Components Letters 17 (2) , pp. 109-111. 10.1109/LMWC.2006.890331
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Jeong, Sigyun, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae, Kenney, J. Stevenson and Kim, Chuldong 2007. High efficiency distributed amplifier using optimum transmission line. Presented at: 2007 European Microwave Conference, Munich, 9-12 October 2007. 2007 European Microwave Conference. Picastaway: IEEE, pp. 1085-1088. 10.1109/EUMC.2007.4405386

Seo, Sujin, Ryu, Namsik, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X and Jeong, Yongchae 2007. Novel high-Q inductor using active inductor structure and feedback parallel resonance circuit. Presented at: 2007 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium, Honolulu, Hawaii, 467-470. 2007 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium. Picastaway: IEEE, pp. 467-470. 10.1109/RFIC.2007.380925

Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae and Kenney, J. Stevenson 2007. Dual-band feedforward linear power amplifier using equal group delay signal canceller. Presented at: 2007 Asia Pacific Microwave Conference, Bangkok, Thailand, 11-14 Dec 2007. 2007 Asia Pacific Microwave Conference. Picastaway, NJ: IEEE, pp. 1-4. 10.1109/APMC.2007.4555143

Jeong, Sigyun, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae, Kenney, J. Stevenson and Kim, Chuldong 2007. High efficiency distributed amplifier using optimum transmission line. Presented at: European Microwave Integrated Circuits Conference (EUMIC), Munich, Germany, 8-10 October 2007. 2007 European Microwave Integrated Circuits Conference. Picastaway, NJ: IEEE, pp. 287-290. 10.1109/EMICC.2007.4412705

Jeong, Sigyun, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae, Kenney, J. Stevenson and Kim, Chuldong 2007. High efficiency distributed amplifier using optimum transmission line. Presented at: European Conference on Wireless Technologies (ECWT), Munich, Germany, 8-10 October 2007. 2007 European Conference on Wireless Technologies. Picastaway, NJ: IEEE, pp. 367-370. 10.1109/ECWT.2007.4404023

Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae, Kenney, J. Stevenson and Kim, Chul Dong 2007. Cross post-distortion balanced power amplifier. Presented at: IEEE/MTT-S International Microwave Symposium 2007, Honolulu, USA, 3-8 June 2007. IEEE/MTT-S International Microwave Symposium, 2007. Picastaway, NJ: IEEE, pp. 1115-1118. 10.1109/MWSYM.2007.380289

Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Lim, Jong-sik, Jeong, Yong-chae and Kim, Chul-dong 2006. Doherty amplifier using load modulation and phase compensation DGS microstrip line. Presented at: 36th European Microwave Conference 2006, Manchester, England, 10-15 September 2006. 2006 European Microwave Conference. Picastaway: IEEE, pp. 352-355. 10.1109/EUMC.2006.281346

Lee, Jin-kuk, Park, Sang-keun, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, jeong, Yong-chae and Yun, Jae-hun 2006. A design of co-channel feedback interference cancellation system using analog control. Presented at: 36th European Microwave Conference, Manchester, England, 10-15 September 2006. 2006 European Microwave Conference. Picastaway, NJ: IEEE, pp. 153-156. 10.1109/EUMC.2006.281241

Park, Sang-keun, Ryu, Nam-sik, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yong-chae and Kim, Chul-dong 2006. A novel design of frequency multiplier using feedforward technique and defected ground structure. Presented at: 36th European Microwave Conference 2006, Manchester, England, 10-15 September 2006. 2006 European Microwave Conference. Picastaway, NJ: IEEE, pp. 224-227. 10.1109/EUMC.2006.281277

Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Lim, Jong-Sik and Jeong, Yong-Chae 2006. A new design of Doherty amplifiers using defected ground structure. IEEE Microwave and Wireless Component Letters 16 (12) , pp. 687-689. 10.1109/LMWC.2006.885636
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Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Hee-Young, Kim, Young, Lim, Jong-Sik, Kim, Chul-Dong and Jeong, Yong-Chae 2005. Dual-band predistortion power amplifier for digital cellular and IMT-2000 base-station application. Presented at: Asia-Pacific Microwave Conference 2005 (APCM 2005), Suzhou, China, 4-7 December 2005. Published in: Hong, Wei, Cui, Tie Jun and Fang, D. G. eds. Microwave Conference Proceedings, 2005, APMC 2005, Asia-Pacific Conference Proceedings. , vol.1 Picastaway: IEEE, p. 1. 10.1109/APMC.2005.1606225

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