介绍了一种新型背腔式对数周期缝隙天线单元，对其各参数特性进行了分析，并采用这种新型天线单元设计了9×7天线阵列。通过HFSS13进行天线阵列的设计。仿真结果表明，该天线阵列在1.5 GHz~6 GHz的工作带宽内，驻波比小于3，回波损耗小于-10 dB，天线阵列最大增益为29.6 dBi，在整个工作带宽内，增益均大于20 dBi。具有良好的定向辐射能力，可用于UWB雷达、探测等领域。%A Log-periodic Slot Antenna with novel cavity is introduced,various parameters are analyzed. A 9×7 log-periodic slot antenna array based on this novel element.Antenna array is designed by HFSS13.The simulated result shows that the antenna array operates in 1.5 GHz~6 GHz.Within the band,return loss is below 3,VSWR is below -10 dB,the antenna gain is upper than 20 dBi and the maxim gain is 29.6 dBi.The antenna array has good unidirectional radiation patterns,which makes the antenna array suitable for the application in UWB radar and detection.
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