A COMPACT PRINTED UWB PACMAN-SHAPED MIMO ANTENNA WITH TWO FREQUENCY REJECTION BANDS

In this paper, the design, analysis and prototyping of a microstrip-fed, low profile, compact ultra-wideband (UWB) monopole antenna with two band notches are presented. The antenna is then used in two multiple-input multiple-output (MIMO) configurations. The antennas are mounted on a low cost FR-4 substrate of a dielectric constant of 4.4. The original shape of the single antenna element is circular with a radius of 11.5 mm, then a sector is removed from the patch (making it a Pacman-shaped antenna) to improve the impedance bandwidth. The proposed antennas provide an impedance bandwidth between 2.9-15 GHz with better than 10 dB return loss and isolation of more than 16 dB and 19 dB for the first and the second MIMO configurations, respectively. Additionally, the antennas can reject the interferences from Worldwide Interoperability for Microwave Access (WiMAX) (3.5 GHz center frequency) and Wireless Local Area Network (WLAN) (5.5 GHz center frequency).