超宽带雷达不受雨、雪、声、风等自然环境的干扰, 可用于无线传感器网络并全天候工作; 在通信领域, 超宽带雷达可避免多径干扰问题, 解决无线传感器网络在复杂多径环境中的应用局限问题。故超宽带雷达可以与无线传感器网络形成天然的结合。为满足无线传感器网络低功耗、体积小的要求, 设计了一种微小型超宽带雷达天线。该天线为共面波导方式馈电的贴片式微带天线。仿真结果表明, 天线具有体积小、带宽广(1.78~2.38 GHz)、全向性好的优点, 满足无线传感器网络应用需求, 并可避免与已用无线通信频段的干扰, 具有广阔的应用前景。

Ultra Wide Band(UWB) radar can avoid interference from snow, sound, wind and other natural environments. So it can be used in wireless sensor networks and work all day without considering weather. Ultra-wideband radar has the ability to avoid multipath interference problems in communications. Therefore, ultra-wideband can be combined with wireless sensor networks. To meet the requirements of wireless sensor networks, a ultra-wideband radar antenna with small size is proposed. The proposed antenna is a microstrip antenna fed by a Coplanar Waveguide(CPW). The simulated results show that the antenna has many advantages, including small size, wide-bandwidth(1.78-2.38 GHz), and good omni-directivity. The antenna can avoid interference of the existing wireless communication bands, and shows broad application prospects.