A novel antenna miniaturization technique of microstrip-fed slot antenna, using a folded slot topology, is highlighted. Antennas are designed with slits on both sides of folded slot and metallic strips on the bottom of the substrate. An unfolded radiating slot of 30.00 mm length is folded to 15.44 mm, without compromising the radiation pattern or return loss characteristics. The proposed antenna exhibits 60.27% reduction in resonant frequency for slits and strips’ loaded folded slot topology in comparison with 48.01% reduction in resonant frequency of previous works. These antennas also offer improved impedance bandwidth. The gain performances of these antennas are improved by placing a dielectric slab on the bottom of the substrate without compromising the radiation pattern characteristics.

重点介绍了一种采用折叠缝隙拓扑的微带馈电缝隙天线的新型天线小型化技术。天线设计为折叠槽两侧有狭缝，基板底部有金属条。长度为 30.00 毫米的展开辐射槽折叠至 15.44 毫米，不会影响辐射方向图或回波损耗特性。与之前作品的谐振频率降低 48.01% 相比，所提出的天线在狭缝和条带加载折叠缝隙拓扑中的谐振频率降低了 60.27%。这些天线还提供改进的阻抗带宽。通过在基板底部放置电介质板来提高这些天线的增益性能，而不会影响辐射方向图特性。