In this work, a novel compact antenna with a super-wideband (SWB) feeding (3–43 GHz) is designed. The SWB lens antenna consists of a super-wideband feeding, a parallel plate waveguide (PPW), and a dielectric lens. The flat Luneburg lens has been designed and implemented based on metasurface technology. This antenna can be employed as a sense antenna in ultrawideband (UWB) applications. Attaining a SWB antenna that also grants a high gain in the whole bandwidth is a major issue considered in this work. The introduced structure reveals a very good matching properties (VSWR < 2.15) and also acceptable gain (5–13.5dBi) and very good efficiency (typ. > 83%) in the whole ultrawide bandwidth (3–43GHz). Another important feature of the proposed structure is its capability for being used in multi-beam applications by merely adding some extra feeding ports to it. To show this, the designed lens is fed by three ports placed on its circumference with 30° angular separation. These results show three beam directions in − 30°, + 30°, and 0°, and in addition to its broad bandwidth, excellent impedance matching and close-to-ideal port isolation are achieved.

在这项工作中，设计了一种具有超宽带（SWB）馈电（3-43 GHz）的新型紧凑型天线。SWB透镜天线由超宽带馈电、平行板波导（PPW）和介质透镜组成。平面Luneburg透镜是基于超表面技术设计和实现的。该天线可用作超宽带 (UWB) 应用中的感应天线。获得在整个带宽内也能获得高增益的 SWB 天线是这项工作中考虑的一个主要问题。所引入的结构在整个超宽带宽（3-43GHz）中表现出非常好的匹配特性（VSWR < 2.15）以及可接受的增益（5-13.5dBi）和非常好的效率（典型值> 83%）。所提出的结构的另一个重要特征是其仅通过添加一些额外的馈电端口就能够用于多光束应用。为了证明这一点，设计的透镜由位于其圆周上且间隔 30° 的三个端口供电。这些结果显示了 − 30°、+ 30° 和 0° 三个波束方向，除了宽带宽之外，还实现了出色的阻抗匹配和接近理想的端口隔离。