Highly omnidirectional and frequency tunable multilayer graphene-based monopole patch antennas. Issue 26 (17th June 2019)

• Record Type: Journal Article
• Authors: Kim, Yun Ki; Lee, Yeri; Shin, Keun-Young; Jang, Jyongsik
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 26(2019)
• Page Start: 7915
• Page End: 7921
• Publication Date: 2019-06-17
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9tc02454a
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Highly omnidirectional and frequency tunable antennas based on multilayer graphene/multi-walled carbon nanotube electrodes were produced by a facile fabrication method. Abstract : We report a facile approach for producing highly omnidirectional and frequency tunable antennas based on multilayer graphene/multi-walled carbon nanotube (MG/MWNTs) electrodes. The MG sheets are obtained by ball milling graphite, followed by sonication. Monopole patch antennas are prepared by screen printing the MG/MWNTs paste onto a polymer substrate. The resulting antennas show excellent performance due to the bridge effect of the MWNTs between well-dispersed adjacent MG layers, which increases the contact area between MG sheets along the horizontal and vertical axes. The antennas formed from the MG/MWNTs exhibit smaller return losses than the antennas formed from pristine graphite, as well as high radiation efficiency (∼44.9%). Moreover, the MG/MWNTs antennas require a relatively small quantity, which leads to low production costs. In addition, the dimensions of the antennas can be simply adjusted by controlling the screen printing mask or cutting with scissors to achieve frequency tunability. These results demonstrate the potential of these MG/MWNTs antennas for applications in wireless communications for ubiquitous sensor networks.