紧凑型共面波导馈电的超宽带印刷天线设计

Design of coplanar waveguide fed printed antenna with compact size for ultra-wideband wireless applications

针对超宽带天线设计的重要性,基于微带天线和电磁散射理论,设计和分析了一种新的紧凑型共面波导反馈超宽带印刷天线。天线采用逆L型和U型非对称的辐射单元结构,以便最大程度地展宽天线带宽。与以往所提出的共面波导馈电天线相比,该天线具有尺寸小、近线性阻抗、高增益、宽频带、准全向性辐射模式和低成本等特点。并且,该天线的主要性能参数达到了一个较好的平衡。仿真和测量结果保持一致。该天线能满足多种宽带无线通信应用的要求。

For the importance of ultra-wideband antenna design,a novel coplanar waveguide（CPW） fed printed antenna with compact size is designed and analyzed for ultra-wideband wireless applications based on the theory of microstrip antenna and electromagnetic scattering.The asymmetric radiation structure with an inverted-L strip and a U-strip is adopted in the proposed antenna which broadens the bandwidth to a great extent.Compared with some CPW-fed antennas in previous researches,the proposed antenna has a small size,relatively high gain,near linear impedance,wider bandwidth,quasi-omnidirectional radiation pattern and low cost characteristics simultaneously.As a result,the proposed antenna achieves a good trade-off among some key performance parameters of the proposed antenna.The measured results agree well with the simulated prediction.The proposed antenna is suitable for a variety of broadband wireless communication applications.