宽频带小型对数周期天线的设计

对数周期天线是结构简单,性能优良的超宽频带天线。利用一副对数周期天线可以覆盖整个短波波段,广泛应用于短波通信中。在超短波和微波波段,在解决好其纵向长度后,对数周期天线实际应用也很广泛。通过分析对数周期天线的基本原理,利用矩量法（伽略金）对其分析计算,结合工程实际要求,设计出一副在超短波到微波波段符合一定技术指标的小型化对数周期天线。测试结果表明,该天线在设计频带内、增益高、尺寸小、结构简单、符合工程设计要求。

Design of miniaturized broadband log-periodic antenna

Log-periodic antenna is an ultra-wideband antenna with simple structure and excellent performance.Using one pair of log-periodic antenna can cover the entire shortwave band,which can be widely used in short-wave communication.In the VHF and microwave bands,in solving its longitudinal length,the practical application of log-periodic antenna is also very extensive.Through analysis of the basic principles of log-periodic antenna,using the method of moments(Galerkin) for its analysis and calculation,combined with the practical requirements of engineering to design a microwave in the VHF band to meet certain technical specifications of the small log-periodic antenna.Test results show that the antenna has high gain,small size,simple structure in the design band,and in line with engineering design requirements.