• Supercapacitor assisted power electronics, Supercapacitors in PV energy harnessing.

• Wireless power transfer, RF wireless energy harnessing and battery less devices, Metamaterials for wireless power enhancement.

• Acoustic wave propagation control (Parametric speaker array design, development, and optimization).

• Addressable data communication and its applications in IoT.

• Consumer electronics application development for smart cities.

• MIEEE, MURSI

• P A S P Pitigala, P L A K Piyumal, A L A K Ranaweera, and S R D Kalingamudali, “An Analysis of Maximum Power Point Tracking Efficiency of a DC-DC Converter-Based Solar Charge Controller,” Proceedings of International Conference on Applied Sciences, p.19, May. 2023.

• C. Chandrarathna, S. A. Graham, M. Ali, A. L. A. K. Ranaweera, L. K. Migara, J. S. Yu, J.-W. Lee, “Analysis and Experiment of Self-Powered, Pulse-Based Energy Harvester Using 400 V FEP-Based Segmented Triboelectric Nanogenerators and 98.2% Tracking Efficient Power Management IC for Multi-Functional IoT Applications,” Advanced Functional Materials, p. 2213900, Feb. 2023.

• P L A K Piyumal, A L A K Ranaweera, S R D Kalingamudali, N Kularatna, “Supercapacitor-Assisted Converter Techniques for Implementing Highly Efficient and Self-sustained Off-grid Renewable Energy Systems”, A book chapter in NSF Thematic Publication in Multisectoral Approaches to Accelerate Economic Transformation in the Face of Crisis in Sri Lanka, p. 208, Jan. 2023.

• G. M. T. Karunathilaka, A. L. A. K. Ranaweera, K. M. D. C. Jayathilaka, and J. A. Seneviratne, “Design of novel perfect metamaterial absorber for Radio Frequency energy harnessing,” Proceedings of International Conference in Applied and Pure Sciences (ICAPS), pp. 37, Oct. 2022.

• P L A K Piyumal, A L A K Ranaweera, S R D Kalingamudali, N Kularatna, “Maximum Power Point Tracking of an Off-Grid Photovoltaic System Consisting of a Series Connected Supercapacitor with a Step-Down Converter,” ECS Transactions, vol. 107, no. 1, p. 16233, Apr. 2022.

• L D P S Jayasekara, T N Gurusinghe, H E Wijesooriya, J A Seneviratne, A L A K Ranaweera, K M D C Jayathilaka, L B D R P Wijesundera, S R D Kalingamudali, “Smart system using Lora technology to connect rural areas underserved by existing internet and telecommunication technologies,” ECS Transactions, vol. 107, no. 1, p. 17731, Apr. 2022.

• A L A K Ranaweera, “Research, Innovation and Commercialization of Consumer Electronics Products for Futuristic Smart Cities,” Proceedings of International workshop on technology transfer and commercialization, Dec. 2021.

• R M I U Rajapaksha, P L A K Piyumal, J A Seneviratne, A L A K Ranaweera, “Eco-friendly smart battery-less Wi-Fi-based environmental condition monitoring system for precision agriculture,” SPAST Abs, vol. 1, no. 01, Sep. 2021.

• P L A Piyumal, A L A K Ranaweera, S R D Kalingamudali, N Kularatna, “Supercapacitor Assisted Hybrid PV System for Efficient Solar Energy Harnessing,” Electronics, 10, no. 19, p. 2422, Oct. 2021.

• L D P S Jayasekara, P L A K Piyumal, A L A K Ranaweera, S R D Kalingamudali, “Efficiency Optimization of Supercapacitor Assisted Low Dropout (SCALDO) Regulators,” Proceedings of 8th IEEE R10, Humanitarian Technology Conference, pp. 152, Dec 2020.

• A L A K Ranaweera, “Experimental Investigation of Metamaterials for Enhancing Wireless Power Transfer Applications,” Presidential Address of Section E1 of SLASS, Proceedings of 76th Annual Sessions of SLAAS, Dec 2020.

• G D K De Silva, P L A K Piyumal, A L A K Ranaweera, S R D Kalingamudali, “Supercapacitor Assisted Wireless Chargers for Moving Electric Vehicles,” Proceedings of 76th Annual Sessions of SLAAS, pp. 73, Dec. 2020.

• D G D D Jayawardana, A L A K Ranaweera and S R D Kalingamudali, “Design and characterization of a parametric speaker using Pulse Width Modulation method,” Proceedings of International Conference in Applied and Pure Sciences (ICAPS) 2020.

• U S R H Fernando, A L A K Ranaweera, S C Chandrarathna, S R D Kalingamudali, “Design and Implementation of Low Drop Diode Equivalent (LDDE) Circuits for Piezoelectric Energy Harvesting,” Proceedings of 76th Annual Sessions of SLAAS, pp. 152, Dec. 2020.

• H P M Udayanga, R T Seneviratne, S A R Geethal, W V I U Kumara, A L A K Ranaweera, S R D Kalingamudali, “Design of an Automated Power Sourcing Unit to Optimize the Operating Schedule of Industrial Loads,” Proceedings of International Conference on Advances in Computing and Technology (ICACT) – 2020, pp. 139-141, Nov. 2020.

• P L A K Piyumal, A L A K Ranaweera, S R D Kalingamudali and Nihal Kularatna, “Analysis of Impedance Matching Technique for Novel Supercapacitor Assisted PV Systems,” Proceedings of the 46th Annual Conference of the IEEE Industrial Electronics Society (IES), IECON 2020, pp. 1756-1761, Oct. 2020.

• R M I U Rajapaksha, P S H Perera, P K D M Nandasena, E P G T K Gunarathna, Gihan Kanishka, A L A K Ranaweera, and S R D Kalingamudali, “Design of an Auto Disconnecting Regulator and Safety Switch to Prevent Domestic Gas Leakages,” Proceedings of the International Research Conference on Smart Computing and Systems Engineering 2020 (SCSE 2020), pp. 80-84, Sep. 2020.

• P L A K Piyumal, A L A K Ranaweera, S R D Kalingamudali and Nihal Kularatna, “Novel slow switching technique for efficient solar energy harnessing for off grid photovoltaic systems,” Proceedings of the 4th International Research Symposium on Pure and Applied Science, p. 101, Oct. 2019.

• R Rajapaksha, S S Dhananjaya, M Wijesuriya, K M S Fernando, A L A K Ranaweera, “Design and implementation of automated heat shrink cutting process for industrial usage,” Proceedings of the 4th International Research Symposium on Pure and Applied Sciences, p. 219, Oct. 2019.

• A. L. A. K. Ranaweera, Thanh Son Pham, Huu Nguyen Bui, Viet Ngo & Jong-Wook Lee, An active metasurface for field-localizing wireless power transfer using dynamically reconfigurable cavities, Scientific Reports 9 (1), p.11735 (2019). https://doi.org/10.1038/

• P.L.A.K Piyumal, A.L.A.K. Ranaweera, S.R.D. Kalingamudali and Nihal Kularatna, Novel slow switching technique for efficient solar energy harnessing for off grid photovoltaic systems, Proceedings of the 4th International Research Symposium on Pure and Applied Science, p. 101, 2019

• R. Rajapaksha, S.S. Dhananjaya, M. Wijesuriya, K.M.S. Fernando, A. L. A. K. Ranaweera, Design and implementation of automated heat shrink cutting process for industrial usage, Proceedings of the 4th International Research Symposium on Pure and Applied Sciences, p. 219, 2019

• P.L.A.K Piyumal, A.L.A.K. Ranaweera, S.R.D. Kalingamudali and Nihal Kularatna " Improving the Energy Storage of Standalone PV Systems while Enhancing the Charging Efficiency using Supercapacitors,", Proceedings of the 20th IEEE International Conference on Industrial Technology (ICIT 2019), Feb. 2019.(Accepted)

• P.L.A.K Piyumal, A.L.A.K. Ranaweera, S.R.D. Kalingamudali and Nihal Kularatna "Novel Approach for Harnessing Maximum Energy from PV Systems using Supercapacitors,", Proceedings of the IEEE Region 10 Humanitarian Technology Conference (IEEE R10HTC 2018), p 5, Dec. 2018.

• R. M. I. U. Rajapaksha, P. S. H. Perera, P. K. D. M. Nandasena, E. P. G. T. K. Gunarathna, T. P. D. Pieris, Gihan Kanishka, A. L. A. K. Ranaweera, and S. R. D. Kalingamudali, Design and Implementation of Smart Standalone Gas Fire Security System for Domestic Usage," Proceedings of the International Postgraduate Research Conference (IPRC 2018), p 65, Dec. 2018.

• P.L.A.K Piyumal, A.L.A.K. Ranaweera, S.R.D. Kalingamudali and Nihal Kularatna "Supercapacitor based novel approach for efficient solar energy harnessing,", Proceedings of the International Research Symposium on Pure and Applied Sciences (IRSPAS 2018), p. 103, Oct. 2018.

• A. L. A. K. Ranaweera, "Metamaterials - Beyond the barriers of nature," Gloria Scientiam - Golden Jubilee Commemorative Volume, Faculty of Science, University of Kelaniya, pp. 553-558. Oct. 2017.

• Thanh Son Pham, Aruna Kumara Ranaweera, Duc Viet Ngo and Jong-Wook Lee, "Analysis and experiments on Fano interference using a 2D metamaterial cavity for field localized wireless power transfer," Journal of Physics D: Applied Physics, Vol. 50, p. 305102 (13pp), July. 2017.DOI: https://doi.org/10.1088/1361-6463/aa7988

• A. L. A. K. Ranaweera, Investigation of Efficiency Enhancement and Selective Hotspot Based Multi-Zone Power Focusing using Metamaterials in Wireless Power Transfer Applications, Kyung Hee University, Feb. 2017.

• A. L. A. K. Ranaweera, "Selective magnetic field localization for safety enhancement in wireless power transfer applications,", Proceedings of the International Research Symposium on Pure and Applied Sciences (IRSPAS 2016), p 49, Dec. 2016.

• A. L. A. K. Ranaweera, Thanh Son Pham, Viet Ngo, and Jong-Wook Lee, “Active metamaterial designs for dynamically controllable wireless power transfer applications,” Proceeding of URSI Asia Pacific Radio Science Conference (AP-RASC), pp.850-853, Aug. 2016. DOI: 10.1109/URSIAP-RASC.2016.7601278

• Thanh Son Pham, Aruna Kumara Ranaweera, Vu Dinh Lam, and Jong-Wook Lee, “Experiments on localized wireless power transmission using a magneto-inductive wave two-dimensional metamaterial cavity”, Applied Physics Express, Vol. 9, p. 044101, (2016) DOI: http://doi.org/10.7567/APEX.9.044101

• A L A K Ranaweera, Carlos Arriola Moscoso and Jong-Wook Lee , “Anisotropic metamaterial for efficiency enhancement of mid-range wireless power transfer under coil misalignment”, Journal of Physics D: Applied Physics, Vol. 48, p. 455104 (8pp), (2015) DOI: http://dx.doi.org/10.1088/0022-3727/48/45/455104

• A. L. A. K. Ranaweera and J. W. Lee, “Experiment study on resonant wireless power transfer to mechanically flexible receiver for wearable electronics”, Proceedings of International symposium on Antennas and Propagation(APS/URSI), pp. 414-415, (2015) DOI: http://dx.doi.org/10.1109/APS.2015.7304593

• A. L. A. K. Ranaweera, T. P. Doung, and J. W. Lee. “Investigation on threshold distance for efficiency enhanced wireless power transfer using bulk metamaterial”, Proceedings of Asia pacific microwave conference (APMC), pp. 1016-1018, (2014)

• A. L. A. K. Ranaweera, T. P. Doung, and J. W. Lee, “Experimental investigation of compact metamaterial for high efficiency mid-range wireless power transfer applications”, Journal of Applied Physics, Vol. 116, p. 043914, (2014) DOI: http://dx.doi.org/10.1063/1.4891715

• A. L. A. K. Ranaweera, T. P. Duong, B. S. Lee, and J.W. Lee, “Experimental Investigation of 3D Metamaterial for Mid-range Wireless Power Transfer”, Proceedings of Wireless Power Transfer Conference (WPTC), pp. 92-96, (2014) DOI: http://dx.doi.org/10.1109/WPT.2014.6839602

• A. L. A. K. Ranaweera, P. H. V. Quang, T. P. Duong, B. S. Lee, and J. W. Lee, “Metamaterial enhanced power transfer system for wireless charging applications”, Proceedings of The 21st Korean Conference on Semiconductors (KCS), pp. 32, (2014)

• A. L. A. K. Ranaweera, P. H. V. Quang, H. V. Duong, T. P. Duong, and J. W. Lee, “Enhanced wireless power charging system for human augmentation using Metamaterial repeater”, Proceedings of Winter Conference of Korean Institute of Communications and Information Science(KICS), pp.89-90, (2014)

Korean Government Scholarship for Postgraduate Studies

Patents:

i. International Publication under Patent Cooperation Treaty (PCT)

• TN Gurusinghe, LDPS Jayasekara, HE Wijesooriya, RMIU Rajapaksha, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). System and method for addressable data communication using Radio Frequency Communication, (WO 2022/189847 A1). World Intellectual Property Organization - https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2022189847&_cid=P20-L8E3Q1-87682-1

ii. Sri Lankan Patents

1. TN Gurusinghe, LDPS Jayasekara, HE Wijesooriya, RMIU Rajapaksha, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). System and method for addressable data communication, processing, control, and visualization based on RF wireless communication with or without an Internet connection, Sri Lankan Patent No 21656. National Intellectual Property Office

2. PLAK Piyumal, ALAK Ranaweera, SRD Kalingamudali and ADVN Kularatna, (2022). Dynamic Power Management Technique for Supercapacitor-Battery Hybrid Photovoltaic Systems, Sri Lankan Patent No 21483. National Intellectual Property Office

3. RMIU Rajapaksha, PSH Perera, PKDM Nandasena, PSTK Gunarathna, ALAK Ranaweera, SRD Kalingamudali and PPDG Kanishka, (2021). Auto removing regulator for Liquefied Petroleum Gas Cylinders and Electricity CUT-OFF system at Gas Leakages, Sri Lankan Patent No 20365. National Intellectual Property Office.

iii. Sri Lankan Patents (Pending)

1. RMIU Rajapaksha, PLAK Piyumal, LDPS Jayasekara, TN Gurusinghe, , HE Wijesooriya, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). AI-based Smart LP Gas Level Indicator, Sri Lankan Patent No 22121. National Intellectual Property Office

2. LDPS Jayasekara, HE Wijesooriya, TN Gurusinghe, RMIU Rajapaksha, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Addressable Data Communication System for Industry Automation and Industrial Internet of Things (IIoT) Based on Controller Area Network (CAN) Protocol, Sri Lankan Patent No 22424. National Intellectual Property Office

3. RMIU Rajapaksha, MPAV Gunawardhana, PLAK Piyumal, LDPS Jayasekara, TN Gurusinghe, HE Wijesooriya, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Neutral Connection-free Liquid-petroleum-gas/propane Sensitive Safety Electrical Switch, Sri Lankan Patent No 22450. National Intellectual Property Office

4. LDPS Jayasekara, TN Gurusinghe, HE Wijesooriya, MPAV Gunawardhana, RMIU Rajapaksha, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2023). Smart Battery-Less Identification Card with Location Tracking and Attendance Monitoring Capabilities, Sri Lankan Patent No 22621. National Intellectual Property Office

5. HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, RMIU Rajapaksha, MPAV Gunawardhana, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2023). Automated Stand-alone Wireless Water Quality Monitoring and Rainwater Harvesting System, Sri Lankan Patent No 22622. National Intellectual Property Office

Industrial Designs:

1. RMIU Rajapaksha, MPAV Gunawardhana, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2023). Safety Electrical Switch, Sri Lankan Industrial Design No 13787

2. HE Wijesooriya, RMIU Rajapaksha, LDPS Jayasekara, TN Gurusinghe, MPAV Gunawardhana, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali Internet Independent Wireless Real-Time Water Quality Monitoring Unit, Sri Lankan Industrial Design No 13786

3. RMIU Rajapaksha, PLAK Piyumal, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Emergency Shut Off Liquid Petroleum Gas Regulator for Domestic Use, Sri Lankan Industrial Design No 13613

4. RMIU Rajapaksha, PLAK Piyumal, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Smart Liquid Petroleum Gas Level Indicator, Sri Lankan Industrial Design No 13554

Industrial Designs (Pending):

1. RMIU Rajapaksha, MPAV Gunawardhana, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Digital Irrigation Control Unit, Sri Lankan Industrial Design No 13741

2. TN Gurusinghe, RMIU Rajapaksha, HE Wijesooriya, LDPS Jayasekara, MPAV Gunawardhana, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2023). Individually Controllable Parametric Speaker Array, Sri Lankan Industrial Design No 13785

Commercialised innovations:

1. The innovation Remotely Controllable Regulator Connected in Series with Resistive and Inductive Loads has been commercialised with Orel Corporation (Private) Limited, and the product launch was held on April 2023

2. In addition, Patent numbers 20365, 21656, 22121, 22424, and 22450 are already being commercialised with 8 License agreements and waiting for the product launches

APPARATUS AND METHOD FOR WIRELESS ENERGY SUPPLIMENT (무선에너지공급장치및방법)

Korean Patent:KR101694950B1

Inventors: Jong Wook Lee, Aruna Ranaweera, Doung Phi Thuc,
  University-Industry Cooperation Group of Kyung Hee University