YU Sihao,YAO Zhendong,ZHANG Zhiqiang.C-band High Gain Low Sidelobe Microstrip Array Antenna Design[J].Journal of Chengdu University of Information Technology,2022,37(04):369-373.[doi:10.16836/j.cnki.jcuit.2022.04.001]
C波段高增益低副瓣微带阵列天线设计
- Title:
- C-band High Gain Low Sidelobe Microstrip Array Antenna Design
- 文章编号:
- 2096-1618(2022)04-0369-05
- Keywords:
- C-band; microstrip array antenna; impedance matching; high gain; low sidelobe
- 分类号:
- TN823+.27
- 文献标志码:
- A
- 摘要:
- 在利用雷达进行目标探测时,通常需要雷达天线具有低副瓣特性以便在杂波和目标中进行精确识别,从而改善雷达探测强度,提高信号质量。针对此要求,提出工作于C波段可应用于多普勒天气雷达探测的高增益低副瓣阵列天线,该阵列天线由64个微带单元组成。微带天线单元采用开槽嵌入式结构馈电,同时改变嵌入深度对单元进行阻抗匹配。阵列使用并联的8组天线,每组天线串联4个1/4阻抗变换线实现阻抗匹配,调控天线单元的输入功率实现阵列的泰勒加权,从而有效地将天线方向图副瓣值降低。在微带阵列天线中心设计同轴馈电结构,并对整个阵列进行参数优化。仿真结果表明,该微带阵列天线在5.51~5.67 GHz的阻抗带宽范围内增益可达到21.2~22.3 dBi,副瓣电平大于25 dB,具有高增益、低副瓣的特点。
- Abstract:
- When radar is used for target detection, Radar antennas are usually required to have low sidelobe characteristics for accurate recognition in clutter and targets, so as to improve radar detection intensity and signal quality.To meet this requirement, a high gain and low sidelobe microstrip array antenna, which can be applied to Doppler weather radar detection in C-band, is proposed in this paper. The array antenna consists of 64 elements.Firstly, the antenna element is fed by slotted embedded structure, and the impedance matching of the element is carried out by changing the embedding depth.Then, the array uses 8 antennas in parallel, and each antenna has four 1/4 impedance transform lines in series to achieve impedance matching.By adjusting the input power of each element to achieve the Taylor weighting of the array, the sidelobe value of the antenna pattern can be effectively reduced.Finally, a coaxial feed structure is designed in the center of the microstrip array antenna, and the parameters of the whole array are optimized.Simulation results show that the gain of the microstrip array antenna can reach 21.2 to 22.3 dBi in the impedance bandwidth range of 5.51-5.67 GHz.And the sidelobe level of the antenna is greater than 25 dB.So it has the characteristics of high gain and low side lobe.
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备注/Memo
收稿日期:2021-12-24
基金项目:国家自然科学基金资助项目(42075001)