1. Millimeter-wave Innovation Technology Research Center, Dongguk University-Seoul, Republic of Korea
2. PG & Research Department of Physics, Arul Anandar College, Madurai, India
3. Department of Physics, Faculty of Science, King Khalid University, Abha, Saudi Arabia
4. Department of Physics, Faculty of Science, Assiut University, Assiut, Egypt
5. Department of Physics, Dongguk University-Seoul, Republic of Korea
6. Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Republic of Korea