1. School of Electrical Engineering, College of Engineering Universiti Teknologi MARA Dungun Malaysia
2. School of Electrical Engineering, College of Engineering Universiti Teknologi MARA Shah Alam Malaysia
3. Department of Electrical Engineering, Faculty of Engineering University of Malaya Kuala Lumpur Malaysia
4. Department of Electrical Engineering, Faculty of Advanced Technology and Multidiscipline Airlangga University Surabaya Indonesia
5. Department of Physics, Faculty of Science Airlangga University Surabaya Indonesia