Ka波段低剖面宽频带平板缝隙天线研究

Ka-band low-profile broadband waveguide-slot antenna research

针对传统平板缝隙天线带宽窄,以及常用宽带平板缝隙天线腔体分层数多,剖面高的缺点,设计了一种新型低剖面宽带平板缝隙天线。该设计对传统方案的辐射单元与馈电网络均进行了改进,增加了缝隙间距的同时,通过合理增加调配块达到宽带良好匹配的效果。缝隙间距的增大,使馈电网络同层化设计得以实现,从而降减少了天线分层数,降低了天线剖面。对新型平板天线进行了HFSS仿真优化,仿真结果表明,该新型平板缝隙天线相对带宽可达到15%、分层只有2层,具有宽频带、分层少、剖面低的优点,该新型平板缝隙天线可以作为未来平板缝隙天线主要方案。

In view of the shortcomings of traditional waveguide-slot antennas with narrow bandwidth,many layers of cavities and high profile,a new low-profile and wide-band waveguide-slot antenna is designed.This design improves both the radiating element and the feeding network of the traditional scheme,increases the gap spacing,as well as achieves the effect of good broadband matching by reasonably increasing the allocation block.The increase of the slot spacing enables the same-layer design of the feeding network to be realized,thereby reducing the number of layers of the antenna and reducing the antenna section.The HFSS simulation optimization of the new flat-panel antenna is carried out.The simulation results show that the relative bandwidth of the new flat-panel slot antenna can reach 15%,and there are only 2 layers,with the advantages of wide frequency band,less layers and low profile.The antenna can be used as the main solution for the future flat-panel slot antenna.