1. Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, Bangi 43600 UKM, Selangor, Malaysia
2. Institute Islam Hadhari, Universiti Kebangsaan Malaysia, Bangi 43600 UKM, Selangor, Malaysia
3. Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, Bangi 43600 UKM, Selangor, Malaysia
4. Electrical and Electronic Engineering Department, Universiti Teknologi Petronas, Seri Iskandar 32610, Perak, Malaysia