Octal-Shaped Defected Ground with Multi-Slotted Nanomaterial Coated Patch for C and X-Band Wireless Applications.

In order to increase bandwidth appropriate for C and X-band applications, the paper presents a multiband antenna etched with many slots on the top patch surface with an octal defective ground structure. Utilizing the radiofrequency sputtering process, the antennas are coated with nanomaterial to improve their properties relative to uncoated antennas. For the proposed antennas (fr1 = 5.92 GHz, fr2 = 9.76 GHz, and fr3 = 12.61 GHz for MSMSADGS and fr1 = 5.95 GHz, fr2 = 9.88 GHz, and fr3 = 12.22 GHz for NC-MSMSA-DGS), three distinct independent resonances are found. Along with improved radiation and return loss characteristics, the antenna showed a 40.2% increase in bandwidth. [ABSTRACT FROM AUTHOR]