1. Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University, Yongin, Gyeonggi-do 17104, Korea
2. NCD Co. Ltd, Daejeon 34015, Korea
3. Electronics and Telecommunications Research Institute, Daejeon 34129, Korea
4. Park Systems Corp., KANC, Gwanggyo-ro 109, Suwon 16229, Korea