Hexagon Shaped Six Port DRA based MIMO Antenna with Pattern Diversity for Wireless Applications

The presented antenna contains six cylindrical dielectric resonators which are mounted on six rectangular substrates arranged in a hexagonal fashion and are placed on six edges of a hexagonal-shaped FR-4 substrate. The hexagonal substrate serves as a common ground for each of the six rectangular substrates. Feeding of this antenna is given by using a ring aperture in the rectangular ground plane. This antenna radiates in six directions such that any two consecutive radiation peaks are separated by 60° in the azimuthal plane. This unique feature allows this antenna to be used for six-direction transmission or reception. The antenna has the maximum dimensions of 59.4 × 66. 6 × 28.0 mm and the operating frequency range of 4.96 - 5.62 GHz with a resonance frequency of 5.2 GHz. The isolation between the ports is more than 19 dB for the overall operating frequency range. The MIMO parameters are within the legitimate limits. This antenna can be used for WLAN (5.15-5.35 GHz) and WiMAX (5.5 GHz) applications.