A compact integrated Bluetooth UWB dual-band notch antenna for automotive communications

This article presents a compact integrated Bluetooth UWB antenna with lower and upper WLAN dual-band notch characteristics for automotive communications. The proposed antenna consists of a quasi U-shape patch, four stubs and the ground plane with a stepped slot. The designed antenna operates over 2.39-2.49 GHz and 3.1-11.4 GHz bands with S11<-10 dB corresponding to Bluetooth and UWB, and has two rejected bands of 4.97-5.48 GHz (lower WLAN) and 5.69-5.99 GHz (upper WLAN). Besides, housing effects of the proposed antenna are investigated in presence of approximate in-vehicular environment and simulated results show that the stable performance is suitable for automotive communications. Finally, a simple two-port MIMO antenna is designed and its performance is appropriate for MIMO/diversity application.