Frank Li, University of California San Diego, United States; Shailesh Pandey, Yajie Chen, Rogers Corporation, United States; John Sanford, University of California San Diego, United States
Nadir Hakem, Nahi Kandil, MUKENDI LEINGTHONE MUAMBA, Université de Québec en Abitibi-Témiscamingue and underground communications research laboratory (LRTCS),, Canada