A method for miniaturization of shortwave antennas is proposed. A miniaturized shortwave antenna which works at the band of 3-15 MHz, based on dipole antenna, with top-lumped components compound loading structure is designed, then combined multi-heical structure is chosen for optimizing. The antenna has got a size scope of 2 m ×2 m ×2 m. Simulated by the commercial software Microwave Studio(R) of CST Corporation,the total efficiency of the antenna is above -20 dB in the whole 3-15 MHz band. This antenna has got the advantages of small size, simple structure and high efficiency and so on. It is applicable in the fields of broadcasting, environment monitoring, radar detecting and so on.%本文提出了一种工作在3-15 MHz的短波天线的小型化设计方案.该天线以偶极天线为基本结构,具有顶端-集总元件的复合加载结构,并采用多螺旋组合结构进行优化.天线尺寸在2 m×2 m×2 m范围内,采用CST公司的商业软件Microwave Studio(R)仿真研究表明,该天线在工作频段内效率均高于-20 dB,具有体积小、结构简单、效率高等优点,可广泛应用在广播通信、环境监测、雷达探测等领域.
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