带CSRR结构的28 GHz微带阵列天线

28 GHz microstrip array antenna with CSRR

设计了一种应用于28 GHz的16元微带阵列天线。为了减小天线的副瓣电平,该天线阵列利用传统印刷电路板工艺,在天线地板刻蚀一系列的互补开口谐振环;与此同时,采用了串并联馈电结合的方式。由于阵列天线单元间存在耦合,为了避免互补开口谐振环对这种耦合作用的影响,将互补开口谐振环加载到串联馈线中间。该天线实测驻波带宽（VRSW≤2）为1.5 GHz（27.2～28.7 GHz）,带内增益大于17.5 dB。测试结果还表明,设计的带有互补开口谐振环的阵列天线与未带该结构的阵列天线相比,在驻波带宽与带内增益几乎不变的情况下,副瓣电平降低4～6 dB。

In this paper, we design the 16 element microstrip array antenna applied for 28 GHz band. In order to reduce the sidelobe level of the antenna, the antenna etch a series of complementary split-ring resonant on ground using printed circuit board technology; at the same time, it also combine of series and parallel feeding. In order to avoid the influence of the complementary opening resonant ring on the coupling between elements, the complementary opening resonant ring is loaded into the middle of the series feeding. The result show that the antenna arrays exhibits an impedance bandwidth（SWR≤2） of 1.5 GHz（27.2～28.7 GHz） and a gain of around 17.5 dB. And it also show that the side lobe level of the antenna with CSRR is reduced up to 4～6 dB lower than antenna without CSRR under the condition that the bandwidth and the peak gain of the traditional array antenna are similarity.