GPS抗干扰导航系统中的微带天线研究
发布时间：2019-02-26 14:21
【摘要】：随着全球定位系统（GPS）的高速发展，对移动便携导航设备中的GPS接收天线提出更高的要求，微带天线在小型化、圆极化和宽频带特性方面具有良好的性能。 在某军事项目升级GPS抗干扰导航系统中，综合考虑原有GPS接收机的空间尺寸，设计了一款用于GPS L1频点1.57542GHz的微带天线。该天线采用在辐射贴片边上开单个槽的方法，并通过选择适当的馈电点位置，实现了微带天线的右旋圆极化和小型化。使用Ansoft HFSS对微带天线进行仿真和优化，得到了微带天线的辐射贴片尺寸为38.5mm，，60o时增益大于1.4dB，轴比为2.25dB，仿真结果表明微带天线具有良好的半球覆盖性和轴比，达到了GPS抗干扰系统的要求。将微带天线组成四单元的微带天线圆形阵列，通过对微带天线阵列仿真确定微带天线单元的布局，达到抗干扰导航系统的对微带天线阵列的回波损耗，隔离度和带宽的指标要求。 使用Agilent E8363B矢量网络分析仪和天线测试转台SWZJ-5对微带天线进行了调试，测试结果表明设计的有效性，能够满足抗干扰GPS导航系统的要求。
[Abstract]:With the rapid development of global positioning system (GPS), higher requirements for GPS receiver antenna in mobile portable navigation equipment have been put forward. Microstrip antenna has a good performance in miniaturization, circular polarization and broadband characteristics. In a military project upgrading GPS anti-jamming navigation system, a microstrip antenna for GPS L1 frequency point 1.57542GHz is designed, considering the space size of the original GPS receiver. The right-hand circular polarization and miniaturization of the microstrip antenna are achieved by selecting the proper position of the feed point and using the method of opening a single slot on the edge of the radiation patch. The microstrip antenna is simulated and optimized by Ansoft HFSS. The radiation patch size of the microstrip antenna is 38.5 mm, the gain is more than 1.4 dB and the axial ratio is 2.25 dB at 60o. The simulation results show that the microstrip antenna has good hemispherical coverage and axial ratio. Meet the requirements of GPS anti-jamming system. The microstrip antenna is formed into a four-unit circular array of microstrip antennas. By simulating the microstrip antenna array, the layout of the microstrip antenna element is determined, and the echo loss of the microstrip antenna array of the anti-jamming navigation system is achieved. Isolation and bandwidth requirements. The microstrip antenna is debugged by using Agilent E8363B vector network analyzer and antenna test turntable SWZJ-5. The test results show that the design is effective and can meet the requirements of anti-jamming GPS navigation system.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TN822;P228.4
本文编号：2430857
[Abstract]:With the rapid development of global positioning system (GPS), higher requirements for GPS receiver antenna in mobile portable navigation equipment have been put forward. Microstrip antenna has a good performance in miniaturization, circular polarization and broadband characteristics. In a military project upgrading GPS anti-jamming navigation system, a microstrip antenna for GPS L1 frequency point 1.57542GHz is designed, considering the space size of the original GPS receiver. The right-hand circular polarization and miniaturization of the microstrip antenna are achieved by selecting the proper position of the feed point and using the method of opening a single slot on the edge of the radiation patch. The microstrip antenna is simulated and optimized by Ansoft HFSS. The radiation patch size of the microstrip antenna is 38.5 mm, the gain is more than 1.4 dB and the axial ratio is 2.25 dB at 60o. The simulation results show that the microstrip antenna has good hemispherical coverage and axial ratio. Meet the requirements of GPS anti-jamming system. The microstrip antenna is formed into a four-unit circular array of microstrip antennas. By simulating the microstrip antenna array, the layout of the microstrip antenna element is determined, and the echo loss of the microstrip antenna array of the anti-jamming navigation system is achieved. Isolation and bandwidth requirements. The microstrip antenna is debugged by using Agilent E8363B vector network analyzer and antenna test turntable SWZJ-5. The test results show that the design is effective and can meet the requirements of anti-jamming GPS navigation system.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TN822;P228.4
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