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Tian Hong Loh

Tian Hong Loh

Principal scientist

Tian Hong Loh is a Principal Scientist and the Science Area Leader for NPL’s Electromagnetic Technologies Group, leading a team of scientists undertaking ground-breaking research on metrology in support of the emerging electromagnetic technologies. 

Tian Hong joined the NPL in 2005 and has over 30 years of experience working in areas of antennas, electromagnetics, RF/microwave, wireless communications and radio propagation. He holds seven patents, one edited book, nine book chapters, two best paper awards from international conferences, and over 230 publications (including standards and best practice guides) as well as technical reports for governmental & commercial contracts in this field. He has a strong track record of supporting technical innovation in industry leading to demonstrable impact. 

Tian Hong has a PhD in engineering from the University of Warwick, is a visiting professor at University of Surrey (Faculty of Engineering and Physical Sciences), visiting industrial fellow at University of Cambridge, senior member of the Institute of Electrical and Electronics Engineers (IEEE), senior member of Antenna Measurement Techniques Association (AMTA) and member of the Institution of Engineering and Technology (IET). He was the Coordinator for EURAMET EMPIR ‘Metrology for 5G Communications’ MET5G project (2015 – 2018) and EURAMET EMPIR ‘Metrology for RF exposure from massive MIMO 5G base station: Impact on 5G network deployment’ 5GRFEX (2019 – 2022). Tian Hong holds distinguished roles in several international activities in this area, including: 

  • President – International Union of Radio Science (URSI) UK Board, 2023 – present 

  • Chair – European Association on Antennas and Propagation (EurAAP) Measurement Working Group, 2023 – present 

  • Conference General Chair – 

    • URSI UK Symposium 2024, 2024 

    • URSI UK Symposium 2025, 2025 

  • Conference TPC Chair –  

    • 18th European Conference on Antennas and Propagation (EuCAP 2024), 2024 

    • 2017 IEEE International Workshop on Electromagnetics (iWEM 2017), 2017 

  • Conference Industrial Liaison Chair – 12th European Conference on Antennas and Propagation (EuCAP 2018), 2018 

  • Special Issue Editor – IET Microwaves, Antennas & Propagation (MAP) Journal, 2023 – present 

  • Guest Editor – IEEE Transactions on Antennas and Propagation (TAP), Special Issue, 2023 – 2024 

  • Associate-Editor –  

    • IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology, 2020 – present 

    • Frontiers in Antennas and Propagation, 2022 – present 

    • IET MAP Journal, 2018 – present 

    • IET Communications (COMMS) Journal, 2016 – present 

  • IEEE Antennas and Propagation Society (AP-S) Representative – IEEE Future Networks Technical Community Steering Committee, 2025 – present 

  • UK representative – URSI Commission A (Electromagnetic Metrology), 2014 – 2021 

  • Technical/Standards Committees –  

    • IEEE AP-S Industrial Initiatives and Listings, 2025 – present 

    • IEEE AP-S New Technology Directions, 2023 – 2025 

    • IEEE AP-S Standards, 2022 – present 

    • IEEE P1765 Standard WG (OTA EVM measurement), 2022 – present 

    • IEEE P1720 Standard WG (Near-Field Antenna Measurements), 2021 – present 

    • IEEE AP-S Technical Committee on Antenna Measurements, 2018 – present 

    • IEEE149 Standard WG (Test Procedures for Antennas), 2015 – 2022 

Areas of interest

  • Applied electromagnetics 

  • 5G and 6G communications 

  • Reconfigurable intelligent surfaces 

  • Integrated Sensing and Communication (ISAC) 

  • Multiple-input-multiple-output (MIMO) / massive MIMO 

  • Over-the-air testing 

  • Channel characterisations 

  • Metamaterials 

  • AI-assisted wireless communications 

  • Body-centric communications 

  • Vehicular communications 

Selected impact hightlights 

  • Designed, developed and showcased real-world trials of NPL-patented reconfigurable intelligent surface (RIS) technology on a commercial 5G base station at BT’s Research Centre at Adastral Park, demonstrated remarkable performance that promises to revolutionise the telecommunications industry (https://www.npl.co.uk/news/revolutionising-the-telecommunications-industry) 

Selected recent publications

See Dr Loh’s Google Scholar page for the full list 

  1. Y. Zheng, B. Lin, T. H. Loh and Y. Qi, "An Improved Method for Quiet Zone Evaluation Using Novel Ultra-Wideband Dual-Polarized Antenna", IEEE Transactions on Antennas and Propagation, Vol. 73, No. 4, Apr. 2025. 

  1. K. Yang, Z. Wang, X. Chen, T. H. Loh, and S. Gao, “Enhancing Aperture Efficiency of Single Parabolic Cylindrical Compact Range Based on a Linear Array Excitation Method”, IEEE Transactions on Antennas and Propagation, Vol. 73, No. 4, Apr. 2025. 

  1. S. Wang, S. Gao, W. Yang, Q. Zhang, T. H. Loh, Y. Yang and F. Qin, “A Physics-Informed Deep Ray Tracing Network for Regional Channel Impulse Response Estimation”, IEEE Transactions on Wireless Communications (Early Access), 18 March 2025. 

  1. S. Wang, Z. Zhang, T. H. Loh, Y. Yang and F. Qin, "Semantic Segmentation of Multipath Fading Channel-Based Regional Map", IEEE Antennas and Wireless Propagation Letters, Vol. 24, No. 2, pp. 439-443, Feb. 2025. 

  1. C. Pichot, G. H. Huff, Y. Yang, Z. H. Jiang, X. Tong, T. H. Loh, A. Alemaryeen, M. Wagih, S. Noghanian, R. C. Paryani, Y. Huang, K. Sakakibara, F. Vipiana, E. Fear, S. Ch. Bakshi, R. Waterhouse, J. Urbina, S. D. Meinrath, B. Po-Jen Shih, R. Sharma, V. Manohar, F. T. Dagefu, and K. Ito, "New and Emerging Directions in the Fields of Antennas and Propagation", Invited Paper, IEEE Transactions on Antennas and Propagation, Vol. 73, No. 1, pp. 566-581, Jan. 2025. 

  1. Z. Zhang, S. Wang, Q. Zhang, T. H. Loh, Y. Yang and F. Qin, "The Ray Inversion Method to Obtain Regional Multipath Channels from Finite Impulse Responses", IEEE Antennas and Wireless Propagation Letters, Vol. 24, No. 1, pp. 93 – 97, Jan. 2025. 

  1. M. Qamar, K. Y. Kapusuz, L. Carslake, T. H. Loh, M. A. Thaha and A. Alomainy, "Ultra-Compact Camera-Integrated Deep-Implanted Two-Port MIMO Antenna for High-Data-Rate Wireless Capsule Endoscopy", IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology (Early Access), pp. 1 – 9, Dec. 2024. 

  1. V.R. Kandregula, Z.D. Zaharis, Q.Z. Ahmed, F.A. Khan, T.H. Loh, J. Schreiber, A. J. R. Serres, P. I. Lazaridis, "A Review of Unmanned Aerial Vehicle Based Antenna and Propagation Measurements", Sensors, Nov. 2024, 24(22):7395. 

  1. L. Si, Y. He, and T. H. Loh, "Guest Editorial: Antenna integration and miniaturisation techniques", IET Microwaves, Antennas & Propagation, Vol. 18, No. 11, pp. 801, Nov. 2024. 

  1. Y. Tang, Z. Wang, W. Fan, X. Chen, T. H. Loh, Z. Luo, and S. Gao, "A Novel Near-field Calibration Method for Linear Array Based on Plane Wave Expansion", IEEE Transactions on Antennas and Propagation, Vol. 72, No. 11, pp. 8173 – 8183, Nov. 2024. 

  1. M. Song, X. Zhang, Z. Wang, D. Xu, T. H. Loh and S. Gao, "3D-Printed Spiral Inverted Ridge Circularly Polarized Horn Antenna with One Octave Bandwidth," IEEE Antennas and Wireless Propagation Letters, Vol. 23, No. 10, pp. 3018-3022, Oct. 2024. 

  1. X. Wei, Y. Miao, X. Jin, T. H. Loh, and G. Liu, "Design of a Novel SiP Integrated RF Front-End Module Based on SOI Switch and SAW Filter", Sensors, Oct. 2024, 24(21):6994. 

  1. F. Zhang, Z. Wang, T. H. Loh, Y. Gui, S. Tang, and W. Fan, “Multiprobe-Enabled Over-the-air Calibration of Millimeter-wave Antenna Array: Concept and Experimental Validation”, invited paper, IEEE Antennas and Propagation Magazine, Vol. 66, No. 4, pp. 14 – 25, Aug. 2024. 

  1. S. Wang, S. Gao, W. Yang, T. H. Loh, Y. Yang, and F. Qin, “Area Restoration of Channel Impulse Response with Time Decomposition based Super-Resolution Method”, IEEE Transactions on Wireless Communications, Vol. 23, No. 8, pp. 9687 – 9700, Aug. 2024. 

  1. Q. Zhang, T. H. Loh, W. Zhang, Y. Yang, Z. Huang, and F. Qin, “A New Evaluation Framework for the Performance of Spatial Correlation in MIMO OTA Testing”, IEEE Transactions on Wireless Communications, Vol. 23, No. 7, pp. 7408 – 7422, Jul. 2024. 

  1. L. Shen, J. Huang, Q. Li, T. H. Loh, and G. Liu, “Dual-Wideband MIMO Antenna with Eight Elements for 5G and WLAN Communication”, Progress In Electromagnetics Research C, Vol. 144, pp. 65-74, Jun. 2024. 

  1. S. Bilson, T. H. Loh, F. Heliot, and A. Thompson, “Physics-Informed Machine Learning Modelling of RF-EMF Exposure in Massive MIMO Systems”, IEEE Access, Vol. 12, pp. 69410 – 69422, May 2024. 

  1. S. Zhu, Z. Wang, W. Fan, T. H. Loh, S. Gao, “Determining the Minimum Number of Plane Wave Generator Radiating Elements Based on SVD of the Near-Field Transfer Matrix”, IEEE Antennas and Wireless Propagation Letters, Vol. 23, No. 5, pp. 1513 – 1517, May 2024. 

  1. A. Granich, and T. H. Loh, “Antenna Measurement Uncertainty”, Invited Roadmap paper, Reviews of Electromagnetics: Antenna Measurement Challenges and Opportunities, Vol. II, pp. 8 – 49, Dec. 2023. 

  1. Y. Zheng, B. Lin, T. H. Loh, and Y. Qi, “A Novel Gain Reference Dipole Antenna for Accurate Calibration of Over the Air Measurement Systems”, IEEE Transactions on Instrumentation and Measurement, Vol. 72, pp. 1 – 10, Art No. 8006610, Oct. 2023. 

  1. Y. Tang, Z. Wang, X. Chen, T. H. Loh, W. Fan, J. Miao and S. Gao, “Near-field Uniform Linear Array Calibration Based on Extrapolation of Measured Complex Signals”, IEEE Transactions on Antennas and Propagation, Vol. 71, No. 10, pp. 8407 – 8412, Oct. 2023. 

  1. W Fan, TH Loh, L Foged, B Derat, Y Huang, and P Kyosti, “Measurement Technologies for Emerging 5G and Beyond Channel Characterization and Antenna Systems”, IEEE Transactions on Antennas and Propagation, Vol. 71, No. 4, pp. 3764 – 3764, Apr. 2023. 

  1. W. Qi, K. Chen, X. Shen, Y. Zhao, Q. Xu, T. H. Loh and Y. Huang, "Statistical Analysis for Shielding Effectiveness Measurement of Materials Using Reverberation Chambers", IEEE Transaction on Electromagnetic Compatibility, Vol. 65, No. 1, Feb. 2023, pp. 17 –27. 

  1. J. Cai, J. Huang, B. Chen, L. Shen, T. H. Loh, and G. Liu*, “A Defected Circular Ring Dual-band MIMO Antenna with High Isolation for 5G and IEEE 802.11 a/ac/ax,” Progress In Electromagnetics Research M, Vol.113, pp. 237-247, Oct. 2022. 

  1. F. Heliot, T. H. Loh, D. Cheadle, Y. Gui, and M. Dieudonne, “An Empirical Study of the Stochastic Nature of Electromagnetic Field Exposure in Massive MIMO Systems”, IEEE Access, Vol. 10, Jun. 2022, pp. 63100 – 63112. 

  1. IEEE Recommended Practice for Antenna Measurements, IEEE Std 149-2021 (Revision of IEEE Std 149-1977), pp.1-207, 18 Feb. 2022. 

  1. Q. Yang, C. Zhang, Q. Cai, T. H. Loh and G. Liu, "A MIMO Antenna with High Gain and Enhanced Isolation for WLAN Applications", Applied Sciences, 12 (5), pp. 2279-2287, Feb. 2022. 

  1. Q. Zhang, T. H. Loh, W. Zhang, Y. Yang, Z. Huang and F. Qin, "A Low-cost and Efficient Single Probe based MIMO OTA Measurement Method," IEEE Transactions on Instrumentation and Measurement, Vol. 71, pp. 1–15, Jan. 2022, Art No. 6501215. 

  1. J. Huang, Z. Chen, Q. Cai, T. H. Loh, G. Liu, "Minimized Triple-Band Eight-Element Antenna Array for 5G Metal-frame Smartphone Applications", Micromachines, Vol. 13, No. 1, pp. 136-147, Jan. 2022. 

  1. T. H. Loh (Editor), Metrology for 5G and Emerging Wireless Technologies, The Institution of Engineering and Technology, 17 Dec. 2021. 

  1. Q. Xu, L. Xing, Y. Zhao, X. Chen, Y. Huang, X. Shen, M. P. Leach, E. G. Lim, and T. H. Loh, "Estimating the Unloaded Quality Factor of Reverberation Chambers Using the Effective Conductivity Model", IEEE Electromagnetic Compatibility Magazine, Vol. 10, No. 3, Nov. 2021, pp. 39–47. 

  1. K. K. Mistry, P. I. Lazaridis, Z. D. Zaharis and T. H. Loh, “Design and Optimization of Compact Printed Log-Periodic Dipole Array Antennas with Extended Low-Frequency Response”, Electronics, Vol. 10, No. 17, 2044, August 2021. 

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