A compact printed UWB Pacman-shaped MIMO antenna with two frequency rejection bands

In this paper, the design and analysis of microstrip-fed low-profile, compact ultra-wideband (UWB) monopole antenna with its dual diversity multiple-input multiple-output (MIMO) configuration and two band-notches characteristics are carried out. The antenna is mounted on a low cost FR-4 substrate with dimensions of 38×60×1.6 mm3, and relative permittivity of 4.4. The original shape of the single antenna element is circular with radius of 11.5 mm, and then a sector is removed from the patch (making it a Pacman-shaped antenna) to improve the impedance bandwidth. The proposed antenna provides an impedance bandwidth between 2.9-15 GHz with better than 10 dB return loss and isolation less than -17 dB. Additionally, the antenna can reject the interferences from WiMAX (3.5 GHz center frequency) and WLAN (5.5 GHz center frequency).