1. Universiti Teknikal Malaysia Melaka,Fakulti Kejuruteraan Elektronik dan Kejuruteraan Komputer,Centre for Telecommunication Research and Innovation (CeTRI),Durian Tunggal 76100 Melaka,Malaysia
2. Uppsala University,Microwaves in Medical Engineering Group, Ångström Laboratory,Department of Electrical Engineering,SE 75121Uppsala,Sweden