In this study,the design,analysis,manufacturing,and testing of a 3D-printed conformal microstrip array antenna for high-temperature environments is presented.3D printing technology is used to fabricate a curved cerami...In this study,the design,analysis,manufacturing,and testing of a 3D-printed conformal microstrip array antenna for high-temperature environments is presented.3D printing technology is used to fabricate a curved ceramic substrate,and laser sintering and microdroplet spraying processes are used to add the conductive metal on the curved substrate.The problems of gain loss,bandwidth reduction,and frequency shift caused by high temperatures are addressed by using a proper antenna design,with parasitic patches,slots,and metal resonant cavities.The antenna prototype is characterized by the curved substrates and the conductive metals for the power dividers,the patch,and the ground plane;its performance is examined up to a temperature of 600℃in a muffle furnace and compared with the results from the numerical analysis.The results show that the antenna can effectively function at 600℃and even higher temperatures.展开更多
本文提出了一种低剖面锥形波束漏波天线,该天线实现了宽仰角扫描范围和较低的方位面不圆度水平。通过在平行板波导表面刻蚀一系列同心圆环漏波结构,实现了导波模式向锥形辐射波束的转换。为有效拓宽俯仰面内的扫描范围,对单元格的色散...本文提出了一种低剖面锥形波束漏波天线,该天线实现了宽仰角扫描范围和较低的方位面不圆度水平。通过在平行板波导表面刻蚀一系列同心圆环漏波结构,实现了导波模式向锥形辐射波束的转换。为有效拓宽俯仰面内的扫描范围,对单元格的色散特性进行了理论分析。利用漏波结构的等效电路模型,提取了对应的集总电路元件参数。同时,评估了不同探针配置对不圆度水平的影响,并最终设计了一种基于接地共面波导的八路等功分馈电网络。实测结果表明,该天线能够工作于30.0 GHz~37.0 GHz的频率范围,相对带宽达21%,仰角扫描范围为45°。该天线具有稳定的全向辐射特性,方位面不圆度低于1.6 d B,交叉极化水平优于-22 d B。所设计的天线可满足毫米波卫星通信和引信探测等领域的应用需求。展开更多
基金National Natural Science Foundation of China(No.U2241205)the Natural Science Basic Research Program of Shaanxi(Nos.2022JC-33,2023-GHZD-35,and 2024JC-ZDXM-25)+1 种基金the Fundamental Research Funds for the Central Universitiesthe National 111 Project to provide fund for conducting experiments。
文摘In this study,the design,analysis,manufacturing,and testing of a 3D-printed conformal microstrip array antenna for high-temperature environments is presented.3D printing technology is used to fabricate a curved ceramic substrate,and laser sintering and microdroplet spraying processes are used to add the conductive metal on the curved substrate.The problems of gain loss,bandwidth reduction,and frequency shift caused by high temperatures are addressed by using a proper antenna design,with parasitic patches,slots,and metal resonant cavities.The antenna prototype is characterized by the curved substrates and the conductive metals for the power dividers,the patch,and the ground plane;its performance is examined up to a temperature of 600℃in a muffle furnace and compared with the results from the numerical analysis.The results show that the antenna can effectively function at 600℃and even higher temperatures.
文摘本文提出了一种低剖面锥形波束漏波天线,该天线实现了宽仰角扫描范围和较低的方位面不圆度水平。通过在平行板波导表面刻蚀一系列同心圆环漏波结构,实现了导波模式向锥形辐射波束的转换。为有效拓宽俯仰面内的扫描范围,对单元格的色散特性进行了理论分析。利用漏波结构的等效电路模型,提取了对应的集总电路元件参数。同时,评估了不同探针配置对不圆度水平的影响,并最终设计了一种基于接地共面波导的八路等功分馈电网络。实测结果表明,该天线能够工作于30.0 GHz~37.0 GHz的频率范围,相对带宽达21%,仰角扫描范围为45°。该天线具有稳定的全向辐射特性,方位面不圆度低于1.6 d B,交叉极化水平优于-22 d B。所设计的天线可满足毫米波卫星通信和引信探测等领域的应用需求。
