【摘要】 近年来,卫星"动中通"系统已大量应用在高速交通工具上。系统中的高增益天线是影响"动中通"系统性能的重要因素之一。针对使用机械方式扫描的抛物面天线剖面较高以及使用电扫描的平面微带阵列天线馈电网络设计比较复杂且损耗较大的问题,设计了一种双极化多层缝隙微带天线单元,并使用该单元天线设计了五个具有不同波束指向的折叠式反射阵列天线。仿真结果显示,所给出的阵元及阵列在4%的带宽内成功实现60度的最大扫描角度,充分验证了该设计方案的可行性。更多还原

【Abstract】 In recent years, high-gain low-profile antennas with wide angle of beam scanning are required for high-speed wireless communications. Traditionally, parabolic reflector antennas with mechanical scanning or planar microstrip patch array with electronic beam scanning are employed. However, parabolic reflector antennas with mechanical scanning are large and heavy while the planar microstrip patch array with electronic beam scanning has high power loss of the complicated feeding network. Novel designs of antenna element were proposed, and five reflectarray antennas with different beam angle using the antenna element as the unit cell were proposed as well. The simulated results of the unit cell and array antennas show that 60 degree scanning angle within 4% bandwidth is achieved successfully, which demonstrates the presented design is practicable.更多还原