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提出了一种具有陷波特性的超宽带分集天线,该平面天线采用两正交分布的端口分别对直角梯形辐射贴片进行馈电。接地板45°轴线上延伸的短路枝节和刻蚀的等腰三角形使端口隔离度大幅提高。辐射贴片上分别开有倒钩形槽从而获得无线局域网(WLAN)带阻特性。所设计的天线带宽覆盖了3.1~10.6 GHz,阻带为5~6 GHz。辐射方向图及信道相关系数(ECC)表明该天线能很好地满足分集系统。由于超宽带电波具有极强的穿透性,该天线可应用于室内和地下精确定位系统中。
An ultra-wideband diversity antenna with notch characteristics is proposed. The planar antenna uses two orthogonally distributed ports to respectively feed right-angle trapezoidal radiation patches. Short-circuiting stubs and etched isosceles triangles extending 45 ° to the ground plane greatly improve port isolation. The radiating patches have barbed grooves on them to obtain the wireless LAN (WLAN) band-stop characteristics. The designed antenna bandwidth covers 3.1 ~ 10.6 GHz and the stopband is 5 ~ 6 GHz. The radiation pattern and channel correlation coefficient (ECC) show that the antenna can well meet the diversity system. Due to the extremely strong penetration of ultra-wideband radio waves, the antenna can be used in precision indoor and underground positioning systems.