Firmansyah, Teguh and Herudin, Herudin and Suhendar, Suhendar and Wiryadinata, Romi and Santoso, M and Denny, Yus and Supriyanto, Toto (2017) Bandwidth and Gain Enhancement of MIMO Antenna by Using Ring and Circular Parasitic with Air-Gap Microstrip Structure. Telkomnika (Telecommunication Computing Electronics and Control), 15 (3). pp. 1155-1163. ISSN 1693-6930