Bandwidth enhancement of wide-slot antenna array for UWB applications

In this letter, a printed wide-slot antenna array for UWB applications is proposed. By connecting small rectangular structure at the bottom of the elliptical slot and rotating the elliptical patches, the impedance matching can be enhancement. The impedance bandwidth is reached 131% from 2.9 GHz to 14 GHz. In addition, the E-plane and H-plane of the array are bi-directional radiation patterns which can better serve for many point-to-point wireless applications such as microwave relays, expressway and subway. Moreover, the measured gain and group delay shown that the proposed design can better worked in UWB field.