1. Faculty of Applied Sciences Universiti Teknologi MARA Cawangan Sarawak, 94300 Samarahan Samarahan Malaysia
2. School of Physics Universiti Sains Malaysia, 11800 USM Penang Malaysia
3. Department of Electrical and Electronic Engineering, Lee Kong Chian Faculty of Engineering and Science Universiti Tunku Abdul Rahman Kajang Malaysia
4. Faculty of Engineering and Technology Multimedia University 75450 Melaka Malaysia