新型超宽带共面波导结构天线的设计

Design of Novel Ultra-Wideband Coplanar Waveguide Structure Antenna

摘要:

设计了一款共面波导馈电的新型超宽带平面天线,该天线印刷在介电常数为 4.4的 FR4覆铜介质基板上,尺寸为 20 mm×30 mm×1.2 mm,利用仿真软件 HFSS对天线参数进行优化仿真。调节辐射贴片上各枝节的长度与宽度,通过不同谐振点的耦合来展宽频带宽度,可实现天线频带宽度为 3~11.7 GHz(S11<-10 dB),相对带宽达到 119%。按照优化尺寸对天线进行加工,实测数据与仿真值基本吻合。结果表明,该天线不仅可以实现超宽频带, 而且结构简单,尺寸小,易于集成。

Abstract:

A CPW-fed novel ultra-wideband coplanar waveguide planar antenna was designed. The antenna was etched on a copper-cladding substrate with relative dielectric constant 4.4(20 mm×30 mm×1.2 mm). The pa. rameters of the antenna were simulated and optimized with HFSS. Adjusting the length and width of the minors on the radiating patch,the coupling of the resonance point was used to widen bandwidth. The results showed that the bandwidth(return loss≤-10 dB) was from 3~11.7 GHz that meant a relative bandwidth of 119%. The antenna was designed in accordance with the optimization of the size of the antenna,the data of software simu. lating and the measured data was consistent.The results showed that the proposed antenna could not only realize the ultra-wideband,and simple structure,small size,ease of integration.