To solve the problems of low gain, narrow bandwidth, and poor radiation directivity of conventional ground penetrating radar antenna, this paper proposes an ultra-wideband and high-gain antipodal tapered slot antenna (ATSA) with planar metamaterial lens. As a constituent part of this lens, a new non-resonant metamaterial unit cell is introduced and analyzed by the full-wave simulation tool. The single-layer planar lens composed of the designed unit cells with different sizes is placed in the maximum radiation direction of the ATSA to greatly enhance its radiation capability. The proposed planar lens antenna has a wide impedance bandwidth of 107.4% (2.41–8 GHz) and −3 dB gain bandwidth of 54.5% (4–7 GHz), respectively. The gain increases averagely by 6.0 dB in the whole operating frequency band, and the peck gain reaches 15.4 dBi at 5.5 GHz. And its excellent performance shows a high application prospect in ground penetrating radar and microwave imaging system.

针对传统探地雷达天线增益低、带宽窄、辐射方向性差等问题，提出一种平面超材料透镜的超宽带高增益对跖锥形缝隙天线（ATSA）。作为该透镜的组成部分，引入了一种新的非共振超材料晶胞，并通过全波模拟工具对其进行了分析。将设计的不同尺寸的晶胞组成的单层平面透镜放置在ATSA的最大辐射方向，大大增强了其辐射能力。所提出的平面透镜天线分别具有 107.4% (2.41-8 GHz) 的宽阻抗带宽和 54.5% (4-7 GHz) 的 -3 dB 增益带宽。在整个工作频段内增益平均增加了6.0 dB，在5.5 GHz时啄增益达到15.4 dBi。