一种叠双菱形天线的改进设计

摘要

在对菱形天线结构和工作原理进行分析的基础上,为缩小天线尺寸结构,提高天线的方向和增益特性,设计了一种以2.4 GHz为中心工作频率的带反射板的叠双菱形天线.设计过程中利用VB软件制作了交互式天线计算器,方便天线尺寸参数的计算和优化调整,并使用4NEC软件搭建天线的模型及仿真优化.在天线测试平台上利用PNA3621网络分析仪对制作的天线进行了测试.测量结果表明,在2.35 GHz～2.45 GHz频率范围内,天线方向图较好,与仿真结果较为吻合,天线输入端电压驻波比和回波损耗较为理想.%Based on the analysis of the structure and working principle of Rhombic antenna, a dual-stack rhombic antenna which operates at the center frequency 2.4 GHz with reflector is presented to reduce the size and increase the directivity and gain characteristics in this paper. Visual Basic software is used to design an interactive antenna calculator, facilitates the calculation and optimization of antenna size parameter. 4NEC software is used to construct, simulate and optimize the antenna model. The antenna is tested by the PNA3621 vector network meter. Simulation and measurement results show that: the antenna has good performance in 2.35 GHz-2.45 GHz frequency range, which agrees well with the simulated results, and the measured voltage standing wave ratio and the echo loss of the antenna are relatively ideal.