小型演化线天线快速制备及评价方法研究

小型演化天线具有高增益、宽带宽、共形、体积小等优点而在航空航天领域具有广泛的应用前景.对演化天线样机进行电磁性能检测是评价其结构设计合理性的有效手段，但演化天线复杂的空间几何结构严重影响样机的成形质量和效率.针对小型演化线天线在结构设计过程中的样机性能快速评价需求，对小型演化线天线的快速成形制造工艺进行研究，并对金属快速成形和非金属快速成形复合表面化学镀铜两种工艺制备的线天线样机进行馈电特性测试.结果表明，两种快速成形工艺所制备线天线样机的馈电特性都能满足设计验证需求，采用快速成形方法来快速制造具有复杂空间几何结构的小型演化线天线样机并进行性能快速评价是完全可行的. 

Research on the Rapid Preparation and Evaluation Method of Small Evolved Wire Antenna

Possessing the advantages of high gain, wide bandwidth, conformal and small volume, the small evolved wire antenna shows a extensive application prospect in the field of aerospace. Electromagnetic property test for the prototype of evolved antenna is an effective method to evaluate the rationality of its structural design. But the complex space geometry structure of the evolved antenna can seriously affect the manufacturing quality and efficiency of the evolved antenna prototype. According to the requirements of performance evaluation for the evolved antenna prototype during the structure designing process of small evolved wire antenna, the rapid prototyping technologies were studied to make small evolved wire antenna. Then two wire antenna prototypes were tested in feed voltage characteristics, which had been made by two methods such as metal rapid prototyping and non-metallic rapid prototyping combined with surface chemical copper plating. The results show that the feed voltage characteristic of small evolved wire antenna prototypes made by both kinds of rapid prototyping technologies can meet the requirement of design verification. It is completely feasible to rapidly fabricate the small evolved antenna prototype with complex space geometry structure by rapid prototyping method and evaluate its performance quickly.