Dual-Band Dual-Beam Microstrip Patch Antenna for Intelligent Transportation Systems Application

In this work, a compact dual-band and dual-beam patch antenna is reported for Intelligent Transportation Systems applications. The 5.9 GHz band is specifically allocated for the ITS purpose and enables flexible implementation of Intelligent Transportation Systems (ITS). CST Microwave Studio has been used in the full wave simulation of proposed antenna. The fabricated prototype has been characterized in an anechoic chamber. Measured and simulated reflection coefficient at desired WLAN/ITS band of this antenna is better than -20 dB at 5.3 GHz and -15 dB for 5.9 GHz while the measured gain of the antenna is 4.8 and 5.7dBi at 5.3 GHz and 5.9 GHz, respectively. The simulated far-field (3D) radiation pattern of the antenna shows dual-beam radiation pattern. The simple physical geometry of the antenna is attractive for use in intelligent transportation systems.