中文摘要：

针对超宽带穿墙雷达的成像分辨率不高和探测运动目标等问题，设计一种大带宽、多极化的超宽带天线单元。该天线单元采用双线性极化微带贴片天线的形式，同轴线馈电，并在背面加装反射板，使天线向前半空间辐射。实际测试表明，天线单元的端口驻波比小于2的带宽为0．85～2．05GHz，极化隔离度小于-30dB，可在超宽带穿墙雷达上实现成像和探测运动目标。

英文摘要：

In view of the highless resolution and the detection of moving targets and other issues of UWB through-wall radar, an ultra wideband antenna array element is designed. The antenna element is a dual linear polarization microstrip patch an- tenna via coaxial feed. A reflection plane on the back makes the antenna foreward half-space radiation. The test results show that the bandwidth of the antenna element is 0.85-2.05 GHz when the antenna element port＇s standing-wave ratio is less than 2. Polarization isolation is less than --30 dB. And it can be used in UWB through-wall radar for imaging and detecting the moving targets.