超宽带缝隙螺旋天线仿真与教学应用研究

Research on simulation and teaching application of UWB slot spiral antennas

改革微波技术与天线实验课程实验教学模式,采用全波电磁仿真软件,设计和仿真了超宽带缝隙结构的平面等角螺旋天线和阿基米德螺旋天线。设计的两种天线都采用同轴电缆直接馈电的方式,结构简单,易于实现。优化和仿真结果表明,在0.4~2GHz的频率范围内,这两种天线的输入电压驻波比小于2,方向图和增益等指标均达到了设计要求,适合于实际应用。仿真结果展示了全波电磁仿真软件的应用效果。

Taking the scientific research as background, this paper proposes an idea about experimental teaching mode reforming of microwave technology and antenna courses by introducing the full wave electromagnetic simulation. The new teaching means can improve the study interests and learning effects of students. As an example, this paper designs and simulates ultra wide band （UWB） slot equiangular spiral antenna （ESA） and Arehimedean spiral antenna （ARSA） employing electromagnetic simulation software to demonstrate the roles of microwave electromagnetic simulation technique in engineering and experimental teaching. The designed antennas are directly fed by the coaxial cables anct are easy to fabricate because of their simple structure. The optimization and simulation results reveal that the input voltage standing wave ratio （VSWR） is less than 2 within the frequency range from 0.4 GHz to 2 GHz for each kind of designed antenna, and the performances of patterns and gains of these two kinds of antennas can also meet the requirements, so the designed antennas are suitable for practical applications. This paper provides the specific simulation results and demonstrates the application effects of the full wave electromagnetic simulation software.