一种半U型开槽叠层宽带微带天线的设计

A broadband stacked microstrip antenna with half U-slot coupling

为了扩展微带天线频宽,缩减微带天线尺寸,更多的在宽频带小型化的环境中应用,利用多层技术、缝隙耦合技术,根据对称性原理,在辐射贴片和寄生贴片上分别开半U型槽缝,提出了一种新颖的半U型开缝叠层宽带微带天线.这种天线增益较高,方向性较好,阻抗带宽达到20.8%,其平面尺寸相比传统的U型开缝叠层天线缩减了50%,在小型化上做出了尝试.因为天线结构紧凑,单元之间的互耦效应小,所以十分适合组阵.最后仿真并加工制作了4单元子阵,实测效果令人满意.

This paper presents a laminated broadband microstrip antenna with semi-U slots. Our objective is to increase the bandwidth of microstrip antennas, reduce their size, and encourage the application of wideband miniaturization. A semi-U slot was cut in both the radiation patch and the parasitic patch in accordance with the theory of symmetry. This antenna has high gain and good directivity. Its impedance bandwidth reaches as high as 20.8% and the planar size is 50% smaller than a conventional antenna. Therefore it is significantly miniaturized. Owing to its compact structure and small mutual coupling effect, the antenna is suitable for use in antenna arrays. A 4-element sub-array was simulated and then assembled. The results of our simulations and physical testing are presented and are in good agreement.