为满足穿墙雷达对超宽带、高增益、小型化天线的需求,提出一种应用于穿墙雷达的新型超宽带Vivaldi天线.通过设计具有梯度分布的斜槽,优化天线表面电流,改善天线增益;加载非对称性椭圆曲率引向器耦合高频能量,改善天线高频增益.天线工作频段为1～3 GHz,增益达到7 dBi,具有定向对称辐射特性及良好的时域响应特性,天线尺寸为160 mm × 150 mm × 1.5 mm.在全波仿真软件中进行穿墙场景模拟,对天线的穿墙辐射能力和墙后目标检测能力进行验证,透射信号和目标回波信号表明天线具备穿墙雷达天线的性能.
Design of UWB Vivaldi Antenna for Through-wall Radar
In order to meet the needs of ultra-wideband(UWB),high-gain,and miniaturized antenna for through-wall radar,a new ultra-wideband Vivaldi antenna for through-wall radar is proposed.The antenna surface current is optimized and the antenna gain is improved by designing a chute with gradient distribution.An asymmetric elliptical curvature director is loaded to couple the high-frequency energy and improve the high-frequency gain of antenna.The working frequency band of the antenna is 1-3 GHz,and its gain reaches 7 dBi.The antenna has the directional symmetrical radiation characteristics and good time-domain response characteristics.The antenna size is 160 mm × 150 mm × 1.5 mm.The through-wall scene is simulated by using the full-wave simulation software to verify the antenna's through-wall radiation capability and target detection capability behind the wall.The transmission signal and target echo signal indicate that the Vivaldi antenna has the performance of a through-wall radar antenna.
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维普
