Dual-Band, Slant-Polarized MIMO Antenna Set for Vehicular Communication

Slant-polarized Multi Input Multi Output (MIMO) antennas are able to improve the performance of mobile communication systems in terms of channel capacity. Specifically, the implementation of MIMO configurations for automotive applications requires the consideration of high gain, wideband, low-profile and affordable antennas in the communication link. In this work, design, simulation and measurement of a new dual-band slant-polarized MIMO antenna with HPBW (Half Power Beam Width) of around 900 are presented. Then, four replicas of the proposed antenna set are placed at four different poles (North, South, West and East) to cover 3600 around the vehicle in an omni-directional pattern. In a real-world scenario, the proper antenna set is selected to communicate with the intended user. Each slant MIMO antenna set consists of two inclined (450) low band (LB: 700 to 900 MHz) and two inclined high band (HB: 1.7 to 2.7 GHz) log-periodic antennas. The measured gain of LB and HB antennas are 7 dBi and 8 dBi, respectively. Strong correlation between simulation and measurement results confirms the accuracy of the design and simulation procedures of the proposed antenna system, obtained using a genetic optimization algorithm. The fabricated antenna was also measured in the field for industrial applications.