一种基于环状介质缩窄波束宽度的微带天线设计

A Design of Microstrip Antenna Based on Ring-shaped Medium to Narrow the Beam Width

针对现有的微波探测模块工作天线在不同环境中应用能力有限等问题,提出了一种基于环状介质缩窄波束宽度的微带天线。天线的工作频率为10.525 GHz,采用在天线上方一定的距离处加载高介电常数介质圆环的方式,有效缩窄了探测波束。通过灵活调整介质圆环与天线的距离,微带天线会得到不同的波束缩窄效果,仿真结果显示,微带天线E面和H面半功率波束宽度分别为26.0°和30.7°,相比初始天线缩窄了68.8%和60.9%,最高增益可提高6 dB。

Aiming at the problem of limited application capabilities of the existing microwave detection module working antennas in different environments,a microstrip antenna based on ring-shaped medium narrowed beam width is proposed.The working frequency of the antenna is 10.525 GHz,and the method of loading a high-dielectric constant dielectric ring at a certain distance above the antenna effectively narrows the detection beam.By flexibly adjusting the distance between the dielectric ring and the antenna,the microstrip antenna will get different beam narrowing effects.The simulation results show that the half-power beam widths of the E-plane and H-plane of the microstrip antenna are 26.0°and 30.7°,respectively,which is narrowed by 68.8%and 60.9%compared with the initial antenna,and the maximum gain can be increased by 6 dB.